mirror of
https://github.com/H3ALY/CollapsibleNavMenu.git
synced 2025-12-19 18:08:42 +00:00
Blazor Web Assembly Collapsible Nav Menu with Sub Menus and JS fix positioning when page width is altered.
This commit is contained in:
@@ -1,13 +1,13 @@
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@inherits LayoutComponentBase
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<div class="page">
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<div class="sidebar">
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<NavMenu />
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<div class="sidebar" style="@IconMenuCssClass">
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<NavMenu ShowIconMenu="ToggleIconMenu" />
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</div>
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<main>
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<div class="top-row px-4">
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<a href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a>
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<a href="https://docs.microsoft.com/aspnet/" target="_blank">About</a>
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</div>
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<article class="content px-4">
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@@ -16,8 +16,13 @@
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</main>
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</div>
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<div id="blazor-error-ui">
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An unhandled error has occurred.
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<a href="" class="reload">Reload</a>
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<a class="dismiss">🗙</a>
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</div>
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@code
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{
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private bool IconMenuActive { get; set; } = false;
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private string? IconMenuCssClass => IconMenuActive ? "width: 80px;" : null;
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protected void ToggleIconMenu(bool iconMenuActive)
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{
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IconMenuActive = iconMenuActive;
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}
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}
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@@ -1,29 +1,184 @@
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<div class="top-row ps-3 navbar navbar-dark">
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@inject IJSRuntime JSRuntime
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<div class="top-row ps-3 navbar navbar-dark">
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<div class="container-fluid">
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<a class="navbar-brand" href="">Blazor_WebAssembly</a>
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@if (!IconMenuActive)
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{
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<a class="navbar-brand" href="">Blazor Server</a>
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}
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<button title="Navigation menu" class="navbar-toggler" @onclick="ToggleNavMenu">
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<span class="navbar-toggler-icon"></span>
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</button>
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</div>
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</div>
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<input type="checkbox" title="Navigation menu" class="navbar-toggler" />
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<div class="nav-scrollable" onclick="document.querySelector('.navbar-toggler').click()">
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<div class="@NavMenuCssClass">
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<nav class="flex-column">
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<div class="nav-item px-3">
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<NavLink class="nav-link" href="" Match="NavLinkMatch.All">
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<span class="bi bi-house-door-fill-nav-menu" aria-hidden="true"></span> Home
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<span class="bi bi-house" aria-hidden="true"></span>
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@if (!IconMenuActive)
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{
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<span><label>Home</label></span>
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}
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</NavLink>
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</div>
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<div class="nav-item px-3">
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<NavLink class="nav-link" href="counter">
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<span class="bi bi-plus-square-fill-nav-menu" aria-hidden="true"></span> Counter
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<span class="bi bi-plus-circle" aria-hidden="true"></span>
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@if (!IconMenuActive)
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{
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<span><label>Counter</label></span>
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}
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</NavLink>
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</div>
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<div class="nav-item px-3">
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<NavLink class="nav-link" href="weather">
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<span class="bi bi-list-nested-nav-menu" aria-hidden="true"></span> Weather
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<span class="bi bi-brightness-high" aria-hidden="true"></span>
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@if (!IconMenuActive)
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{
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<span><label>Fetch data</label></span>
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}
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</NavLink>
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</div>
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<div class="nav-item px-3" @onclick='@(() => ToggleSubMenu("subMenu1"))'>
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<NavLink class="nav-link flex-container" Match="NavLinkMatch.All">
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<span class="bi bi-folder" aria-hidden="true" title="subMenu"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 1</label></span>
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<span class="oi chevron-icon @(IsSubMenuOpen("subMenu1") ? "bi bi-arrow-up-short" : "bi bi-arrow-down-short")" aria-hidden="true"></span>
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}
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</NavLink>
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<div class="sub-menu" style="display: @(IsSubMenuOpen("subMenu1") ? "block" : "none")">
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<NavLink class="nav-link" href="subitem1">
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<span class="bi bi-arrow-right-circle" aria-hidden="true" title="Sub Item 1"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 1 Item 1</label></span>
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}
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</NavLink>
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<NavLink class="nav-link" href="subitem2">
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<span class="bi bi-arrow-right-circle" aria-hidden="true" title="Sub Item 2"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 1 Item 2</label></span>
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}
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</NavLink>
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</div>
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</div>
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<div class="nav-item px-3" @onclick='@(() => ToggleSubMenu("subMenu2"))'>
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<NavLink class="nav-link flex-container" Match="NavLinkMatch.All">
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<span class="bi bi-folder" aria-hidden="true" title="subMenu"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 2</label></span>
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<span class="oi chevron-icon @(IsSubMenuOpen("subMenu2") ? "bi bi-arrow-up-short" : "bi bi-arrow-down-short")" aria-hidden="true"></span>
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}
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</NavLink>
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<div class="sub-menu" style="display: @(IsSubMenuOpen("subMenu2") ? "block" : "none")">
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<NavLink class="nav-link" href="subitem1">
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<span class="bi bi-arrow-right-circle" aria-hidden="true" title="Sub Item 1"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 2 Item 1</label></span>
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}
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</NavLink>
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<NavLink class="nav-link" href="subitem2">
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<span class="bi bi-arrow-right-circle" aria-hidden="true" title="Sub Item 2"></span>
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@if (!IconMenuActive)
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{
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<span><label>Sub Menu 2 Item 2</label></span>
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}
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</NavLink>
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</div>
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</div>
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</nav>
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</div>
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</div>
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<div class="bottom-row">
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<div class="icon-menu-arrow">
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@if (!IconMenuActive)
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{
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<span class="bi bi-arrow-bar-left" style="color: white;" @onclick="ToggleIconMenu"></span>
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}
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else
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{
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<span class="bi bi-arrow-bar-right" style="color: white;" @onclick="ToggleIconMenu"></span>
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}
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</div>
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</div>
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@code
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{
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[Parameter]
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public EventCallback<bool> ShowIconMenu { get; set; }
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private bool IconMenuActive { get; set; } = false;
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private bool collapseNavMenu = true;
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private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;
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private Dictionary<string, bool> subMenuStates = new Dictionary<string, bool>();
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protected override async Task OnAfterRenderAsync(bool firstRender)
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{
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if (firstRender)
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{
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await JSRuntime.InvokeVoidAsync("setResizeCallback", DotNetObjectReference.Create(this));
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}
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}
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[JSInvokable]
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public async Task OnResize(bool isBelowThreshold)
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{
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if (isBelowThreshold && IconMenuActive)
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{
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collapseNavMenu = true;
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await ToggleIconMenu();
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await ShowIconMenu.InvokeAsync(IconMenuActive);
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await InvokeAsync(StateHasChanged);
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}
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}
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private void ToggleNavMenu()
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{
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collapseNavMenu = !collapseNavMenu;
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}
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private async Task ToggleIconMenu()
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{
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IconMenuActive = !IconMenuActive;
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await ShowIconMenu.InvokeAsync(IconMenuActive);
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}
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private void ToggleSubMenu(string subMenuKey)
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{
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if (subMenuStates.ContainsKey(subMenuKey) && subMenuStates[subMenuKey])
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{
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subMenuStates[subMenuKey] = false;
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}
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else
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{
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foreach (var key in subMenuStates.Keys.ToList())
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{
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subMenuStates[key] = false;
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}
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if (subMenuStates.ContainsKey(subMenuKey))
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{
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subMenuStates[subMenuKey] = !subMenuStates[subMenuKey];
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}
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else
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{
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subMenuStates[subMenuKey] = true;
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}
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}
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}
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private bool IsSubMenuOpen(string subMenuKey)
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{
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return subMenuStates.ContainsKey(subMenuKey) && subMenuStates[subMenuKey];
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}
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}
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@@ -1,49 +1,34 @@
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.navbar-toggler {
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appearance: none;
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cursor: pointer;
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width: 3.5rem;
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height: 2.5rem;
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color: white;
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position: absolute;
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top: 0.5rem;
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right: 1rem;
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border: 1px solid rgba(255, 255, 255, 0.1);
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background: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.55%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") no-repeat center/1.75rem rgba(255, 255, 255, 0.1);
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}
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.navbar-toggler:checked {
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background-color: rgba(255, 255, 255, 0.5);
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background-color: rgba(255, 255, 255, 0.1);
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}
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.top-row {
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height: 3.5rem;
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background-color: rgba(0,0,0,0.4);
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background-color: rgba(0, 0, 0, 0.4);
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}
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.bottom-row {
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position: absolute;
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bottom: 0;
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padding-bottom: 10px;
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text-align: right;
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width: 100%;
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padding-right: 28px;
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}
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.icon-menu-arrow {
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text-align: right;
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}
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.navbar-brand {
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font-size: 1.1rem;
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}
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.bi {
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display: inline-block;
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position: relative;
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width: 1.25rem;
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height: 1.25rem;
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margin-right: 0.75rem;
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top: -1px;
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background-size: cover;
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}
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.bi-house-door-fill-nav-menu {
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background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='white' class='bi bi-house-door-fill' viewBox='0 0 16 16'%3E%3Cpath d='M6.5 14.5v-3.505c0-.245.25-.495.5-.495h2c.25 0 .5.25.5.5v3.5a.5.5 0 0 0 .5.5h4a.5.5 0 0 0 .5-.5v-7a.5.5 0 0 0-.146-.354L13 5.793V2.5a.5.5 0 0 0-.5-.5h-1a.5.5 0 0 0-.5.5v1.293L8.354 1.146a.5.5 0 0 0-.708 0l-6 6A.5.5 0 0 0 1.5 7.5v7a.5.5 0 0 0 .5.5h4a.5.5 0 0 0 .5-.5Z'/%3E%3C/svg%3E");
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}
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.bi-plus-square-fill-nav-menu {
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background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='white' class='bi bi-plus-square-fill' viewBox='0 0 16 16'%3E%3Cpath d='M2 0a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V2a2 2 0 0 0-2-2H2zm6.5 4.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3a.5.5 0 0 1 1 0z'/%3E%3C/svg%3E");
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}
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.bi-list-nested-nav-menu {
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background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='white' class='bi bi-list-nested' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M4.5 11.5A.5.5 0 0 1 5 11h10a.5.5 0 0 1 0 1H5a.5.5 0 0 1-.5-.5zm-2-4A.5.5 0 0 1 3 7h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm-2-4A.5.5 0 0 1 1 3h10a.5.5 0 0 1 0 1H1a.5.5 0 0 1-.5-.5z'/%3E%3C/svg%3E");
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.oi {
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width: 2rem;
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font-size: 1.1rem;
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vertical-align: text-top;
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top: -2px;
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}
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.nav-item {
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@@ -59,47 +44,40 @@
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padding-bottom: 1rem;
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}
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.nav-item ::deep .nav-link {
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.nav-item ::deep a {
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color: #d7d7d7;
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background: none;
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border: none;
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border-radius: 4px;
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height: 3rem;
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display: flex;
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align-items: center;
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line-height: 3rem;
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width: 100%;
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}
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.nav-item ::deep a.active {
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background-color: rgba(255,255,255,0.37);
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color: white;
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}
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.nav-item ::deep a.active {
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background-color: rgba(255, 255, 255, 0.25);
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color: white;
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}
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.nav-item ::deep .nav-link:hover {
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background-color: rgba(255,255,255,0.1);
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color: white;
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}
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.nav-scrollable {
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display: none;
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}
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.navbar-toggler:checked ~ .nav-scrollable {
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display: block;
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}
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.nav-item ::deep a:hover {
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background-color: rgba(255, 255, 255, 0.1);
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color: white;
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}
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@media (min-width: 641px) {
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.navbar-toggler {
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display: none;
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}
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.nav-scrollable {
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/* Never collapse the sidebar for wide screens */
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.collapse {
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display: block;
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/* Allow sidebar to scroll for tall menus */
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height: calc(100vh - 3.5rem);
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overflow-y: auto;
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}
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}
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.nav-item label,
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.sub-menu label {
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margin-left: 8px;
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}
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.nav-item .chevron-icon {
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padding-left: 8px;
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}
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