Use undefined instead of null | undefined for commands

src/vs/editor/browser/controller/coreCommands.ts

@@ -301,13 +301,13 @@ export namespace CoreNavigationCommands {
 	export const MoveTo: CoreEditorCommand = registerEditorCommand(new BaseMoveToCommand({
 		id: '_moveTo',
 		inSelectionMode: false,
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const MoveToSelect: CoreEditorCommand = registerEditorCommand(new BaseMoveToCommand({
 		id: '_moveToSelect',
 		inSelectionMode: true,
-		precondition: null
+		precondition: undefined
 	}));
 
 	abstract class ColumnSelectCommand extends CoreEditorCommand {
@@ -330,7 +330,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'columnSelect',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -354,7 +354,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'cursorColumnSelectLeft',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -373,7 +373,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'cursorColumnSelectRight',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -405,7 +405,7 @@ export namespace CoreNavigationCommands {
 	export const CursorColumnSelectUp: CoreEditorCommand = registerEditorCommand(new ColumnSelectUpCommand({
 		isPaged: false,
 		id: 'cursorColumnSelectUp',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -417,7 +417,7 @@ export namespace CoreNavigationCommands {
 	export const CursorColumnSelectPageUp: CoreEditorCommand = registerEditorCommand(new ColumnSelectUpCommand({
 		isPaged: true,
 		id: 'cursorColumnSelectPageUp',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -443,7 +443,7 @@ export namespace CoreNavigationCommands {
 	export const CursorColumnSelectDown: CoreEditorCommand = registerEditorCommand(new ColumnSelectDownCommand({
 		isPaged: false,
 		id: 'cursorColumnSelectDown',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -455,7 +455,7 @@ export namespace CoreNavigationCommands {
 	export const CursorColumnSelectPageDown: CoreEditorCommand = registerEditorCommand(new ColumnSelectDownCommand({
 		isPaged: true,
 		id: 'cursorColumnSelectPageDown',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -468,7 +468,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'cursorMove',
-				precondition: null,
+				precondition: undefined,
 				description: CursorMove_.description
 			});
 		}
@@ -531,7 +531,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorLeft',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -548,7 +548,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorLeftSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -564,7 +564,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorRight',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -581,7 +581,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorRightSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -597,7 +597,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorUp',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -614,7 +614,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorUpSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -633,7 +633,7 @@ export namespace CoreNavigationCommands {
 			value: Constants.PAGE_SIZE_MARKER
 		},
 		id: 'cursorPageUp',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -649,7 +649,7 @@ export namespace CoreNavigationCommands {
 			value: Constants.PAGE_SIZE_MARKER
 		},
 		id: 'cursorPageUpSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -665,7 +665,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorDown',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -682,7 +682,7 @@ export namespace CoreNavigationCommands {
 			value: 1
 		},
 		id: 'cursorDownSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -701,7 +701,7 @@ export namespace CoreNavigationCommands {
 			value: Constants.PAGE_SIZE_MARKER
 		},
 		id: 'cursorPageDown',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -717,7 +717,7 @@ export namespace CoreNavigationCommands {
 			value: Constants.PAGE_SIZE_MARKER
 		},
 		id: 'cursorPageDownSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -729,7 +729,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'createCursor',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -790,7 +790,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: '_lastCursorMoveToSelect',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -835,7 +835,7 @@ export namespace CoreNavigationCommands {
 	export const CursorHome: CoreEditorCommand = registerEditorCommand(new HomeCommand({
 		inSelectionMode: false,
 		id: 'cursorHome',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -847,7 +847,7 @@ export namespace CoreNavigationCommands {
 	export const CursorHomeSelect: CoreEditorCommand = registerEditorCommand(new HomeCommand({
 		inSelectionMode: true,
 		id: 'cursorHomeSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -860,7 +860,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'cursorLineStart',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -914,7 +914,7 @@ export namespace CoreNavigationCommands {
 	export const CursorEnd: CoreEditorCommand = registerEditorCommand(new EndCommand({
 		inSelectionMode: false,
 		id: 'cursorEnd',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -926,7 +926,7 @@ export namespace CoreNavigationCommands {
 	export const CursorEndSelect: CoreEditorCommand = registerEditorCommand(new EndCommand({
 		inSelectionMode: true,
 		id: 'cursorEndSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -939,7 +939,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'cursorLineEnd',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -994,7 +994,7 @@ export namespace CoreNavigationCommands {
 	export const CursorTop: CoreEditorCommand = registerEditorCommand(new TopCommand({
 		inSelectionMode: false,
 		id: 'cursorTop',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -1006,7 +1006,7 @@ export namespace CoreNavigationCommands {
 	export const CursorTopSelect: CoreEditorCommand = registerEditorCommand(new TopCommand({
 		inSelectionMode: true,
 		id: 'cursorTopSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -1038,7 +1038,7 @@ export namespace CoreNavigationCommands {
 	export const CursorBottom: CoreEditorCommand = registerEditorCommand(new BottomCommand({
 		inSelectionMode: false,
 		id: 'cursorBottom',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -1050,7 +1050,7 @@ export namespace CoreNavigationCommands {
 	export const CursorBottomSelect: CoreEditorCommand = registerEditorCommand(new BottomCommand({
 		inSelectionMode: true,
 		id: 'cursorBottomSelect',
-		precondition: null,
+		precondition: undefined,
 		kbOpts: {
 			weight: CORE_WEIGHT,
 			kbExpr: EditorContextKeys.textInputFocus,
@@ -1063,7 +1063,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'editorScroll',
-				precondition: null,
+				precondition: undefined,
 				description: EditorScroll_.description
 			});
 		}
@@ -1134,7 +1134,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'scrollLineUp',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -1159,7 +1159,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'scrollPageUp',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -1185,7 +1185,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'scrollLineDown',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -1210,7 +1210,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'scrollPageDown',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -1257,20 +1257,20 @@ export namespace CoreNavigationCommands {
 	export const WordSelect: CoreEditorCommand = registerEditorCommand(new WordCommand({
 		inSelectionMode: false,
 		id: '_wordSelect',
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const WordSelectDrag: CoreEditorCommand = registerEditorCommand(new WordCommand({
 		inSelectionMode: true,
 		id: '_wordSelectDrag',
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const LastCursorWordSelect: CoreEditorCommand = registerEditorCommand(new class extends CoreEditorCommand {
 		constructor() {
 			super({
 				id: 'lastCursorWordSelect',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -1317,13 +1317,13 @@ export namespace CoreNavigationCommands {
 	export const LineSelect: CoreEditorCommand = registerEditorCommand(new LineCommand({
 		inSelectionMode: false,
 		id: '_lineSelect',
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const LineSelectDrag: CoreEditorCommand = registerEditorCommand(new LineCommand({
 		inSelectionMode: true,
 		id: '_lineSelectDrag',
-		precondition: null
+		precondition: undefined
 	}));
 
 	class LastCursorLineCommand extends CoreEditorCommand {
@@ -1353,20 +1353,20 @@ export namespace CoreNavigationCommands {
 	export const LastCursorLineSelect: CoreEditorCommand = registerEditorCommand(new LastCursorLineCommand({
 		inSelectionMode: false,
 		id: 'lastCursorLineSelect',
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const LastCursorLineSelectDrag: CoreEditorCommand = registerEditorCommand(new LastCursorLineCommand({
 		inSelectionMode: true,
 		id: 'lastCursorLineSelectDrag',
-		precondition: null
+		precondition: undefined
 	}));
 
 	export const ExpandLineSelection: CoreEditorCommand = registerEditorCommand(new class extends CoreEditorCommand {
 		constructor() {
 			super({
 				id: 'expandLineSelection',
-				precondition: null,
+				precondition: undefined,
 				kbOpts: {
 					weight: CORE_WEIGHT,
 					kbExpr: EditorContextKeys.textInputFocus,
@@ -1445,7 +1445,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'revealLine',
-				precondition: null,
+				precondition: undefined,
 				description: RevealLine_.description
 			});
 		}
@@ -1493,7 +1493,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'selectAll',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -1513,7 +1513,7 @@ export namespace CoreNavigationCommands {
 		constructor() {
 			super({
 				id: 'setSelection',
-				precondition: null
+				precondition: undefined
 			});
 		}
 
@@ -1728,7 +1728,7 @@ class EditorHandlerCommand extends Command {
 	constructor(id: string, handlerId: string, description?: ICommandHandlerDescription) {
 		super({
 			id: id,
-			precondition: null,
+			precondition: undefined,
 			description: description
 		});
 		this._handlerId = handlerId;

src/vs/editor/browser/editorExtensions.ts

@@ -40,17 +40,17 @@ export interface ICommandMenubarOptions {
 }
 export interface ICommandOptions {
 	id: string;
-	precondition: ContextKeyExpr | null;
-	kbOpts?: ICommandKeybindingsOptions | null;
+	precondition: ContextKeyExpr | undefined;
+	kbOpts?: ICommandKeybindingsOptions;
 	description?: ICommandHandlerDescription;
 	menubarOpts?: ICommandMenubarOptions;
 }
 export abstract class Command {
 	public readonly id: string;
-	public readonly precondition: ContextKeyExpr | null;
-	private readonly _kbOpts: ICommandKeybindingsOptions | null | undefined;
-	private readonly _menubarOpts: ICommandMenubarOptions | null | undefined;
-	private readonly _description: ICommandHandlerDescription | null | undefined;
+	public readonly precondition: ContextKeyExpr | undefined;
+	private readonly _kbOpts: ICommandKeybindingsOptions | undefined;
+	private readonly _menubarOpts: ICommandMenubarOptions | undefined;
+	private readonly _description: ICommandHandlerDescription | undefined;
 
 	constructor(opts: ICommandOptions) {
 		this.id = opts.id;

src/vs/editor/contrib/bracketMatching/bracketMatching.ts

@@ -31,7 +31,7 @@ class JumpToBracketAction extends EditorAction {
 			id: 'editor.action.jumpToBracket',
 			label: nls.localize('smartSelect.jumpBracket', "Go to Bracket"),
 			alias: 'Go to Bracket',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.US_BACKSLASH,
@@ -55,7 +55,7 @@ class SelectToBracketAction extends EditorAction {
 			id: 'editor.action.selectToBracket',
 			label: nls.localize('smartSelect.selectToBracket', "Select to Bracket"),
 			alias: 'Select to Bracket',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/contrib/clipboard/clipboard.ts

@@ -59,7 +59,7 @@ abstract class ExecCommandAction extends EditorAction {
 class ExecCommandCutAction extends ExecCommandAction {
 
 	constructor() {
-		let kbOpts: ICommandKeybindingsOptions | null = {
+		let kbOpts: ICommandKeybindingsOptions | undefined = {
 			kbExpr: EditorContextKeys.textInputFocus,
 			primary: KeyMod.CtrlCmd | KeyCode.KEY_X,
 			win: { primary: KeyMod.CtrlCmd | KeyCode.KEY_X, secondary: [KeyMod.Shift | KeyCode.Delete] },
@@ -68,7 +68,7 @@ class ExecCommandCutAction extends ExecCommandAction {
 		// Do not bind cut keybindings in the browser,
 		// since browsers do that for us and it avoids security prompts
 		if (!platform.isNative) {
-			kbOpts = null;
+			kbOpts = undefined;
 		}
 		super('cut', {
 			id: 'editor.action.clipboardCutAction',
@@ -107,7 +107,7 @@ class ExecCommandCutAction extends ExecCommandAction {
 class ExecCommandCopyAction extends ExecCommandAction {
 
 	constructor() {
-		let kbOpts: ICommandKeybindingsOptions | null = {
+		let kbOpts: ICommandKeybindingsOptions | undefined = {
 			kbExpr: EditorContextKeys.textInputFocus,
 			primary: KeyMod.CtrlCmd | KeyCode.KEY_C,
 			win: { primary: KeyMod.CtrlCmd | KeyCode.KEY_C, secondary: [KeyMod.CtrlCmd | KeyCode.Insert] },
@@ -116,14 +116,14 @@ class ExecCommandCopyAction extends ExecCommandAction {
 		// Do not bind copy keybindings in the browser,
 		// since browsers do that for us and it avoids security prompts
 		if (!platform.isNative) {
-			kbOpts = null;
+			kbOpts = undefined;
 		}
 
 		super('copy', {
 			id: 'editor.action.clipboardCopyAction',
 			label: nls.localize('actions.clipboard.copyLabel', "Copy"),
 			alias: 'Copy',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: kbOpts,
 			menuOpts: {
 				group: CLIPBOARD_CONTEXT_MENU_GROUP,
@@ -162,7 +162,7 @@ class ExecCommandCopyAction extends ExecCommandAction {
 class ExecCommandPasteAction extends ExecCommandAction {
 
 	constructor() {
-		let kbOpts: ICommandKeybindingsOptions | null = {
+		let kbOpts: ICommandKeybindingsOptions | undefined = {
 			kbExpr: EditorContextKeys.textInputFocus,
 			primary: KeyMod.CtrlCmd | KeyCode.KEY_V,
 			win: { primary: KeyMod.CtrlCmd | KeyCode.KEY_V, secondary: [KeyMod.Shift | KeyCode.Insert] },
@@ -171,7 +171,7 @@ class ExecCommandPasteAction extends ExecCommandAction {
 		// Do not bind paste keybindings in the browser,
 		// since browsers do that for us and it avoids security prompts
 		if (!platform.isNative) {
-			kbOpts = null;
+			kbOpts = undefined;
 		}
 
 		super('paste', {
@@ -201,7 +201,7 @@ class ExecCommandCopyWithSyntaxHighlightingAction extends ExecCommandAction {
 			id: 'editor.action.clipboardCopyWithSyntaxHighlightingAction',
 			label: nls.localize('actions.clipboard.copyWithSyntaxHighlightingLabel', "Copy With Syntax Highlighting"),
 			alias: 'Copy With Syntax Highlighting',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: 0,

src/vs/editor/contrib/contextmenu/contextmenu.ts

@@ -228,7 +228,7 @@ class ShowContextMenu extends EditorAction {
 			id: 'editor.action.showContextMenu',
 			label: nls.localize('action.showContextMenu.label', "Show Editor Context Menu"),
 			alias: 'Show Editor Context Menu',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.Shift | KeyCode.F10,

src/vs/editor/contrib/cursorUndo/cursorUndo.ts

@@ -119,7 +119,7 @@ export class CursorUndo extends EditorAction {
 			id: 'cursorUndo',
 			label: nls.localize('cursor.undo', "Soft Undo"),
 			alias: 'Soft Undo',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_U,

src/vs/editor/contrib/find/findController.ts

@@ -422,7 +422,7 @@ export class StartFindAction extends EditorAction {
 			id: FIND_IDS.StartFindAction,
 			label: nls.localize('startFindAction', "Find"),
 			alias: 'Find',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: null,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_F,
@@ -459,7 +459,7 @@ export class StartFindWithSelectionAction extends EditorAction {
 			id: FIND_IDS.StartFindWithSelection,
 			label: nls.localize('startFindWithSelectionAction', "Find With Selection"),
 			alias: 'Find With Selection',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: null,
 				primary: 0,
@@ -513,7 +513,7 @@ export class NextMatchFindAction extends MatchFindAction {
 			id: FIND_IDS.NextMatchFindAction,
 			label: nls.localize('findNextMatchAction', "Find Next"),
 			alias: 'Find Next',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyCode.F3,
@@ -535,7 +535,7 @@ export class PreviousMatchFindAction extends MatchFindAction {
 			id: FIND_IDS.PreviousMatchFindAction,
 			label: nls.localize('findPreviousMatchAction', "Find Previous"),
 			alias: 'Find Previous',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.Shift | KeyCode.F3,
@@ -583,7 +583,7 @@ export class NextSelectionMatchFindAction extends SelectionMatchFindAction {
 			id: FIND_IDS.NextSelectionMatchFindAction,
 			label: nls.localize('nextSelectionMatchFindAction', "Find Next Selection"),
 			alias: 'Find Next Selection',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.CtrlCmd | KeyCode.F3,
@@ -604,7 +604,7 @@ export class PreviousSelectionMatchFindAction extends SelectionMatchFindAction {
 			id: FIND_IDS.PreviousSelectionMatchFindAction,
 			label: nls.localize('previousSelectionMatchFindAction', "Find Previous Selection"),
 			alias: 'Find Previous Selection',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.F3,
@@ -625,7 +625,7 @@ export class StartFindReplaceAction extends EditorAction {
 			id: FIND_IDS.StartFindReplaceAction,
 			label: nls.localize('startReplace', "Replace"),
 			alias: 'Replace',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: null,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_H,
@@ -704,7 +704,7 @@ registerEditorCommand(new FindCommand({
 
 registerEditorCommand(new FindCommand({
 	id: FIND_IDS.ToggleCaseSensitiveCommand,
-	precondition: null,
+	precondition: undefined,
 	handler: x => x.toggleCaseSensitive(),
 	kbOpts: {
 		weight: KeybindingWeight.EditorContrib + 5,
@@ -718,7 +718,7 @@ registerEditorCommand(new FindCommand({
 
 registerEditorCommand(new FindCommand({
 	id: FIND_IDS.ToggleWholeWordCommand,
-	precondition: null,
+	precondition: undefined,
 	handler: x => x.toggleWholeWords(),
 	kbOpts: {
 		weight: KeybindingWeight.EditorContrib + 5,
@@ -732,7 +732,7 @@ registerEditorCommand(new FindCommand({
 
 registerEditorCommand(new FindCommand({
 	id: FIND_IDS.ToggleRegexCommand,
-	precondition: null,
+	precondition: undefined,
 	handler: x => x.toggleRegex(),
 	kbOpts: {
 		weight: KeybindingWeight.EditorContrib + 5,
@@ -746,7 +746,7 @@ registerEditorCommand(new FindCommand({
 
 registerEditorCommand(new FindCommand({
 	id: FIND_IDS.ToggleSearchScopeCommand,
-	precondition: null,
+	precondition: undefined,
 	handler: x => x.toggleSearchScope(),
 	kbOpts: {
 		weight: KeybindingWeight.EditorContrib + 5,

src/vs/editor/contrib/folding/folding.ts

@@ -503,7 +503,7 @@ class UnfoldAction extends FoldingAction<FoldingArguments> {
 			id: 'editor.unfold',
 			label: nls.localize('unfoldAction.label', "Unfold"),
 			alias: 'Unfold',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.US_CLOSE_SQUARE_BRACKET,
@@ -567,7 +567,7 @@ class UnFoldRecursivelyAction extends FoldingAction<void> {
 			id: 'editor.unfoldRecursively',
 			label: nls.localize('unFoldRecursivelyAction.label', "Unfold Recursively"),
 			alias: 'Unfold Recursively',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.US_CLOSE_SQUARE_BRACKET),
@@ -588,7 +588,7 @@ class FoldAction extends FoldingAction<FoldingArguments> {
 			id: 'editor.fold',
 			label: nls.localize('foldAction.label', "Fold"),
 			alias: 'Fold',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.US_OPEN_SQUARE_BRACKET,
@@ -652,7 +652,7 @@ class FoldRecursivelyAction extends FoldingAction<void> {
 			id: 'editor.foldRecursively',
 			label: nls.localize('foldRecursivelyAction.label', "Fold Recursively"),
 			alias: 'Fold Recursively',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.US_OPEN_SQUARE_BRACKET),
@@ -674,7 +674,7 @@ class FoldAllBlockCommentsAction extends FoldingAction<void> {
 			id: 'editor.foldAllBlockComments',
 			label: nls.localize('foldAllBlockComments.label', "Fold All Block Comments"),
 			alias: 'Fold All Block Comments',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.US_SLASH),
@@ -707,7 +707,7 @@ class FoldAllRegionsAction extends FoldingAction<void> {
 			id: 'editor.foldAllMarkerRegions',
 			label: nls.localize('foldAllMarkerRegions.label', "Fold All Regions"),
 			alias: 'Fold All Regions',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_8),
@@ -740,7 +740,7 @@ class UnfoldAllRegionsAction extends FoldingAction<void> {
 			id: 'editor.unfoldAllMarkerRegions',
 			label: nls.localize('unfoldAllMarkerRegions.label', "Unfold All Regions"),
 			alias: 'Unfold All Regions',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_9),
@@ -773,7 +773,7 @@ class FoldAllAction extends FoldingAction<void> {
 			id: 'editor.foldAll',
 			label: nls.localize('foldAllAction.label', "Fold All"),
 			alias: 'Fold All',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_0),
@@ -794,7 +794,7 @@ class UnfoldAllAction extends FoldingAction<void> {
 			id: 'editor.unfoldAll',
 			label: nls.localize('unfoldAllAction.label', "Unfold All"),
 			alias: 'Unfold All',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_J),
@@ -838,7 +838,7 @@ for (let i = 1; i <= 7; i++) {
 			id: FoldLevelAction.ID(i),
 			label: nls.localize('foldLevelAction.label', "Fold Level {0}", i),
 			alias: `Fold Level ${i}`,
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | (KeyCode.KEY_0 + i)),

src/vs/editor/contrib/fontZoom/fontZoom.ts

@@ -15,7 +15,7 @@ class EditorFontZoomIn extends EditorAction {
 			id: 'editor.action.fontZoomIn',
 			label: nls.localize('EditorFontZoomIn.label', "Editor Font Zoom In"),
 			alias: 'Editor Font Zoom In',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -31,7 +31,7 @@ class EditorFontZoomOut extends EditorAction {
 			id: 'editor.action.fontZoomOut',
 			label: nls.localize('EditorFontZoomOut.label', "Editor Font Zoom Out"),
 			alias: 'Editor Font Zoom Out',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -47,7 +47,7 @@ class EditorFontZoomReset extends EditorAction {
 			id: 'editor.action.fontZoomReset',
 			label: nls.localize('EditorFontZoomReset.label', "Editor Font Zoom Reset"),
 			alias: 'Editor Font Zoom Reset',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/contrib/goToDefinition/goToDefinitionMouse.ts

@@ -294,7 +294,7 @@ class GotoDefinitionWithMouseEditorContribution implements editorCommon.IEditorC
 
 	private gotoDefinition(target: IMouseTarget, sideBySide: boolean): Promise<any> {
 		this.editor.setPosition(target.position!);
-		const action = new DefinitionAction(new DefinitionActionConfig(sideBySide, false, true, false), { alias: '', label: '', id: '', precondition: null });
+		const action = new DefinitionAction(new DefinitionActionConfig(sideBySide, false, true, false), { alias: '', label: '', id: '', precondition: undefined });
 		return this.editor.invokeWithinContext(accessor => action.run(accessor, this.editor));
 	}
 

src/vs/editor/contrib/hover/hover.ts

@@ -251,7 +251,7 @@ class ShowHoverAction extends EditorAction {
 				]
 			}, "Show Hover"),
 			alias: 'Show Hover',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_I),

src/vs/editor/contrib/indentation/indentation.ts

@@ -253,7 +253,7 @@ export class IndentUsingTabs extends ChangeIndentationSizeAction {
 			id: IndentUsingTabs.ID,
 			label: nls.localize('indentUsingTabs', "Indent Using Tabs"),
 			alias: 'Indent Using Tabs',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -267,7 +267,7 @@ export class IndentUsingSpaces extends ChangeIndentationSizeAction {
 			id: IndentUsingSpaces.ID,
 			label: nls.localize('indentUsingSpaces', "Indent Using Spaces"),
 			alias: 'Indent Using Spaces',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -281,7 +281,7 @@ export class DetectIndentation extends EditorAction {
 			id: DetectIndentation.ID,
 			label: nls.localize('detectIndentation', "Detect Indentation from Content"),
 			alias: 'Detect Indentation from Content',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/contrib/links/links.ts

@@ -410,7 +410,7 @@ class OpenLinkAction extends EditorAction {
 			id: 'editor.action.openLink',
 			label: nls.localize('label', "Open Link"),
 			alias: 'Open Link',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/contrib/multicursor/multicursor.ts

@@ -34,7 +34,7 @@ export class InsertCursorAbove extends EditorAction {
 			id: 'editor.action.insertCursorAbove',
 			label: nls.localize('mutlicursor.insertAbove', "Add Cursor Above"),
 			alias: 'Add Cursor Above',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Alt | KeyCode.UpArrow,
@@ -83,7 +83,7 @@ export class InsertCursorBelow extends EditorAction {
 			id: 'editor.action.insertCursorBelow',
 			label: nls.localize('mutlicursor.insertBelow', "Add Cursor Below"),
 			alias: 'Add Cursor Below',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Alt | KeyCode.DownArrow,
@@ -132,7 +132,7 @@ class InsertCursorAtEndOfEachLineSelected extends EditorAction {
 			id: 'editor.action.insertCursorAtEndOfEachLineSelected',
 			label: nls.localize('mutlicursor.insertAtEndOfEachLineSelected', "Add Cursors to Line Ends"),
 			alias: 'Add Cursors to Line Ends',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.Shift | KeyMod.Alt | KeyCode.KEY_I,
@@ -184,7 +184,7 @@ class InsertCursorAtEndOfLineSelected extends EditorAction {
 			id: 'editor.action.addCursorsToBottom',
 			label: nls.localize('mutlicursor.addCursorsToBottom', "Add Cursors To Bottom"),
 			alias: 'Add Cursors To Bottom',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -214,7 +214,7 @@ class InsertCursorAtTopOfLineSelected extends EditorAction {
 			id: 'editor.action.addCursorsToTop',
 			label: nls.localize('mutlicursor.addCursorsToTop', "Add Cursors To Top"),
 			alias: 'Add Cursors To Top',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -650,7 +650,7 @@ export class AddSelectionToNextFindMatchAction extends MultiCursorSelectionContr
 			id: 'editor.action.addSelectionToNextFindMatch',
 			label: nls.localize('addSelectionToNextFindMatch', "Add Selection To Next Find Match"),
 			alias: 'Add Selection To Next Find Match',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_D,
@@ -675,7 +675,7 @@ export class AddSelectionToPreviousFindMatchAction extends MultiCursorSelectionC
 			id: 'editor.action.addSelectionToPreviousFindMatch',
 			label: nls.localize('addSelectionToPreviousFindMatch', "Add Selection To Previous Find Match"),
 			alias: 'Add Selection To Previous Find Match',
-			precondition: null,
+			precondition: undefined,
 			menubarOpts: {
 				menuId: MenuId.MenubarSelectionMenu,
 				group: '3_multi',
@@ -695,7 +695,7 @@ export class MoveSelectionToNextFindMatchAction extends MultiCursorSelectionCont
 			id: 'editor.action.moveSelectionToNextFindMatch',
 			label: nls.localize('moveSelectionToNextFindMatch', "Move Last Selection To Next Find Match"),
 			alias: 'Move Last Selection To Next Find Match',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyChord(KeyMod.CtrlCmd | KeyCode.KEY_K, KeyMod.CtrlCmd | KeyCode.KEY_D),
@@ -714,7 +714,7 @@ export class MoveSelectionToPreviousFindMatchAction extends MultiCursorSelection
 			id: 'editor.action.moveSelectionToPreviousFindMatch',
 			label: nls.localize('moveSelectionToPreviousFindMatch', "Move Last Selection To Previous Find Match"),
 			alias: 'Move Last Selection To Previous Find Match',
-			precondition: null
+			precondition: undefined
 		});
 	}
 	protected _run(multiCursorController: MultiCursorSelectionController, findController: CommonFindController): void {
@@ -728,7 +728,7 @@ export class SelectHighlightsAction extends MultiCursorSelectionControllerAction
 			id: 'editor.action.selectHighlights',
 			label: nls.localize('selectAllOccurrencesOfFindMatch', "Select All Occurrences of Find Match"),
 			alias: 'Select All Occurrences of Find Match',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.KEY_L,

src/vs/editor/contrib/smartSelect/smartSelect.ts

@@ -161,7 +161,7 @@ class GrowSelectionAction extends AbstractSmartSelect {
 			id: 'editor.action.smartSelect.expand',
 			label: nls.localize('smartSelect.expand', "Expand Selection"),
 			alias: 'Expand Selection',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.Shift | KeyMod.Alt | KeyCode.RightArrow,
@@ -187,7 +187,7 @@ class ShrinkSelectionAction extends AbstractSmartSelect {
 			id: 'editor.action.smartSelect.shrink',
 			label: nls.localize('smartSelect.shrink', "Shrink Selection"),
 			alias: 'Shrink Selection',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyMod.Shift | KeyMod.Alt | KeyCode.LeftArrow,

src/vs/editor/contrib/toggleTabFocusMode/toggleTabFocusMode.ts

@@ -20,7 +20,7 @@ export class ToggleTabFocusModeAction extends EditorAction {
 			id: ToggleTabFocusModeAction.ID,
 			label: nls.localize({ key: 'toggle.tabMovesFocus', comment: ['Turn on/off use of tab key for moving focus around VS Code'] }, "Toggle Tab Key Moves Focus"),
 			alias: 'Toggle Tab Key Moves Focus',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: null,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_M,

src/vs/editor/contrib/tokenization/tokenization.ts

@@ -14,7 +14,7 @@ class ForceRetokenizeAction extends EditorAction {
 			id: 'editor.action.forceRetokenize',
 			label: nls.localize('forceRetokenize', "Developer: Force Retokenize"),
 			alias: 'Developer: Force Retokenize',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/contrib/wordOperations/wordOperations.ts

@@ -98,7 +98,7 @@ export class CursorWordStartLeft extends WordLeftCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordStartLeft',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.CtrlCmd | KeyCode.LeftArrow,
@@ -115,7 +115,7 @@ export class CursorWordEndLeft extends WordLeftCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordEndLeft',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -126,7 +126,7 @@ export class CursorWordLeft extends WordLeftCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordStartFast,
 			id: 'cursorWordLeft',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -137,7 +137,7 @@ export class CursorWordStartLeftSelect extends WordLeftCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordStartLeftSelect',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.LeftArrow,
@@ -154,7 +154,7 @@ export class CursorWordEndLeftSelect extends WordLeftCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordEndLeftSelect',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -165,7 +165,7 @@ export class CursorWordLeftSelect extends WordLeftCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordLeftSelect',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -176,7 +176,7 @@ export class CursorWordStartRight extends WordRightCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordStartRight',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -187,7 +187,7 @@ export class CursorWordEndRight extends WordRightCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordEndRight',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.CtrlCmd | KeyCode.RightArrow,
@@ -204,7 +204,7 @@ export class CursorWordRight extends WordRightCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordRight',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -215,7 +215,7 @@ export class CursorWordStartRightSelect extends WordRightCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordStartRightSelect',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -226,7 +226,7 @@ export class CursorWordEndRightSelect extends WordRightCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordEndRightSelect',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: KeyMod.CtrlCmd | KeyMod.Shift | KeyCode.RightArrow,
@@ -243,7 +243,7 @@ export class CursorWordRightSelect extends WordRightCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordRightSelect',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }

src/vs/editor/contrib/wordPartOperations/wordPartOperations.ts

@@ -79,7 +79,7 @@ export class CursorWordPartLeft extends WordPartLeftCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordPartLeft',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: 0,
@@ -98,7 +98,7 @@ export class CursorWordPartLeftSelect extends WordPartLeftCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordStart,
 			id: 'cursorWordPartLeftSelect',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: 0,
@@ -122,7 +122,7 @@ export class CursorWordPartRight extends WordPartRightCommand {
 			inSelectionMode: false,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordPartRight',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: 0,
@@ -138,7 +138,7 @@ export class CursorWordPartRightSelect extends WordPartRightCommand {
 			inSelectionMode: true,
 			wordNavigationType: WordNavigationType.WordEnd,
 			id: 'cursorWordPartRightSelect',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.textInputFocus,
 				primary: 0,

src/vs/editor/standalone/browser/accessibilityHelp/accessibilityHelp.ts

@@ -330,7 +330,7 @@ class ShowAccessibilityHelpAction extends EditorAction {
 			id: 'editor.action.showAccessibilityHelp',
 			label: AccessibilityHelpNLS.showAccessibilityHelpAction,
 			alias: 'Show Accessibility Help',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: (browser.isIE ? KeyMod.CtrlCmd | KeyCode.F1 : KeyMod.Alt | KeyCode.F1),

src/vs/editor/standalone/browser/inspectTokens/inspectTokens.ts

@@ -84,7 +84,7 @@ class InspectTokens extends EditorAction {
 			id: 'editor.action.inspectTokens',
 			label: InspectTokensNLS.inspectTokensAction,
 			alias: 'Developer: Inspect Tokens',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/editor/standalone/browser/quickOpen/gotoLine.ts

@@ -149,7 +149,7 @@ export class GotoLineAction extends BaseEditorQuickOpenAction {
 			id: 'editor.action.gotoLine',
 			label: GoToLineNLS.gotoLineActionLabel,
 			alias: 'Go to Line...',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.CtrlCmd | KeyCode.KEY_G,

src/vs/editor/standalone/browser/quickOpen/quickCommand.ts

@@ -82,7 +82,7 @@ export class QuickCommandAction extends BaseEditorQuickOpenAction {
 			id: 'editor.action.quickCommand',
 			label: QuickCommandNLS.quickCommandActionLabel,
 			alias: 'Command Palette',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: (browser.isIE ? KeyMod.Alt | KeyCode.F1 : KeyCode.F1),

src/vs/editor/standalone/browser/toggleHighContrast/toggleHighContrast.ts

@@ -17,7 +17,7 @@ class ToggleHighContrast extends EditorAction {
 			id: 'editor.action.toggleHighContrast',
 			label: ToggleHighContrastNLS.toggleHighContrast,
 			alias: 'Toggle High Contrast Theme',
-			precondition: null
+			precondition: undefined
 		});
 		this._originalThemeName = null;
 	}

src/vs/workbench/contrib/codeEditor/browser/accessibility/accessibility.ts

@@ -282,7 +282,7 @@ class ShowAccessibilityHelpAction extends EditorAction {
 			id: 'editor.action.showAccessibilityHelp',
 			label: nls.localize('ShowAccessibilityHelpAction', "Show Accessibility Help"),
 			alias: 'Show Accessibility Help',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.focus,
 				primary: KeyMod.Alt | KeyCode.F1,

src/vs/workbench/contrib/codeEditor/browser/inspectKeybindings.ts

@@ -17,7 +17,7 @@ class InspectKeyMap extends EditorAction {
 			id: 'workbench.action.inspectKeyMappings',
 			label: nls.localize('workbench.action.inspectKeyMap', "Developer: Inspect Key Mappings"),
 			alias: 'Developer: Inspect Key Mappings',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/workbench/contrib/codeEditor/browser/inspectTMScopes/inspectTMScopes.ts

@@ -102,7 +102,7 @@ class InspectTMScopes extends EditorAction {
 			id: 'editor.action.inspectTMScopes',
 			label: nls.localize('inspectTMScopes', "Developer: Inspect TM Scopes"),
 			alias: 'Developer: Inspect TM Scopes',
-			precondition: null
+			precondition: undefined
 		});
 	}
 

src/vs/workbench/contrib/codeEditor/browser/toggleWordWrap.ts

@@ -121,7 +121,7 @@ class ToggleWordWrapAction extends EditorAction {
 			id: TOGGLE_WORD_WRAP_ID,
 			label: nls.localize('toggle.wordwrap', "View: Toggle Word Wrap"),
 			alias: 'View: Toggle Word Wrap',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: null,
 				primary: KeyMod.Alt | KeyCode.KEY_Z,

src/vs/workbench/contrib/comments/browser/commentsEditorContribution.ts

@@ -840,7 +840,7 @@ export class NextCommentThreadAction extends EditorAction {
 			id: 'editor.action.nextCommentThreadAction',
 			label: nls.localize('nextCommentThreadAction', "Go to Next Comment Thread"),
 			alias: 'Go to Next Comment Thread',
-			precondition: null,
+			precondition: undefined,
 		});
 	}
 

src/vs/workbench/contrib/debug/browser/debugEditorActions.ts

@@ -26,7 +26,7 @@ class ToggleBreakpointAction extends EditorAction {
 			id: TOGGLE_BREAKPOINT_ID,
 			label: nls.localize('toggleBreakpointAction', "Debug: Toggle Breakpoint"),
 			alias: 'Debug: Toggle Breakpoint',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: {
 				kbExpr: EditorContextKeys.editorTextFocus,
 				primary: KeyCode.F9,
@@ -63,7 +63,7 @@ class ConditionalBreakpointAction extends EditorAction {
 			id: TOGGLE_CONDITIONAL_BREAKPOINT_ID,
 			label: nls.localize('conditionalBreakpointEditorAction', "Debug: Add Conditional Breakpoint..."),
 			alias: 'Debug: Add Conditional Breakpoint...',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -85,7 +85,7 @@ class LogPointAction extends EditorAction {
 			id: TOGGLE_LOG_POINT_ID,
 			label: nls.localize('logPointEditorAction', "Debug: Add Logpoint..."),
 			alias: 'Debug: Add Logpoint...',
-			precondition: null
+			precondition: undefined
 		});
 	}
 
@@ -288,7 +288,7 @@ class GoToNextBreakpointAction extends GoToBreakpointAction {
 			id: 'editor.debug.action.goToNextBreakpoint',
 			label: nls.localize('goToNextBreakpoint', "Debug: Go To Next Breakpoint"),
 			alias: 'Debug: Go To Next Breakpoint',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }
@@ -299,7 +299,7 @@ class GoToPreviousBreakpointAction extends GoToBreakpointAction {
 			id: 'editor.debug.action.goToPreviousBreakpoint',
 			label: nls.localize('goToPreviousBreakpoint', "Debug: Go To Previous Breakpoint"),
 			alias: 'Debug: Go To Previous Breakpoint',
-			precondition: null
+			precondition: undefined
 		});
 	}
 }

src/vs/workbench/contrib/quickopen/browser/commandsHandler.ts

@@ -192,7 +192,7 @@ class CommandPaletteEditorAction extends EditorAction {
 			id: ShowAllCommandsAction.ID,
 			label: nls.localize('showCommands.label', "Command Palette..."),
 			alias: 'Command Palette',
-			precondition: null,
+			precondition: undefined,
 			menuOpts: {
 				group: 'z_commands',
 				order: 1

src/vs/workbench/contrib/scm/browser/dirtydiffDecorator.ts

@@ -367,7 +367,7 @@ export class ShowPreviousChangeAction extends EditorAction {
 			id: 'editor.action.dirtydiff.previous',
 			label: nls.localize('show previous change', "Show Previous Change"),
 			alias: 'Show Previous Change',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: { kbExpr: EditorContextKeys.editorTextFocus, primary: KeyMod.Shift | KeyMod.Alt | KeyCode.F3, weight: KeybindingWeight.EditorContrib }
 		});
 	}
@@ -401,7 +401,7 @@ export class ShowNextChangeAction extends EditorAction {
 			id: 'editor.action.dirtydiff.next',
 			label: nls.localize('show next change', "Show Next Change"),
 			alias: 'Show Next Change',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: { kbExpr: EditorContextKeys.editorTextFocus, primary: KeyMod.Alt | KeyCode.F3, weight: KeybindingWeight.EditorContrib }
 		});
 	}
@@ -454,7 +454,7 @@ export class MoveToPreviousChangeAction extends EditorAction {
 			id: 'workbench.action.editor.previousChange',
 			label: nls.localize('move to previous change', "Move to Previous Change"),
 			alias: 'Move to Previous Change',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: { kbExpr: EditorContextKeys.editorTextFocus, primary: KeyMod.Shift | KeyMod.Alt | KeyCode.F5, weight: KeybindingWeight.EditorContrib }
 		});
 	}
@@ -496,7 +496,7 @@ export class MoveToNextChangeAction extends EditorAction {
 			id: 'workbench.action.editor.nextChange',
 			label: nls.localize('move to next change', "Move to Next Change"),
 			alias: 'Move to Next Change',
-			precondition: null,
+			precondition: undefined,
 			kbOpts: { kbExpr: EditorContextKeys.editorTextFocus, primary: KeyMod.Alt | KeyCode.F5, weight: KeybindingWeight.EditorContrib }
 		});
 	}

src/vs/workbench/contrib/terminal/browser/terminal.contribution.ts

@@ -502,7 +502,7 @@ actionRegistry.registerWorkbenchAction(new SyncActionDescriptor(FindPrevious, Fi
 
 const sendSequenceTerminalCommand = new SendSequenceTerminalCommand({
 	id: SendSequenceTerminalCommand.ID,
-	precondition: null,
+	precondition: undefined,
 	description: {
 		description: `Send Custom Sequence To Terminal`,
 		args: [{