Blade模板中@section和@yield用于構(gòu)建可重用的HTML結(jié)構(gòu)。①@section('name')定義內(nèi)容塊，②@yield('name')在布局中顯示該內(nèi)容。例如，在布局文件中使用@extends并結(jié)合@section填充動(dòng)態(tài)內(nèi)容，實(shí)現(xiàn)頁(yè)面結(jié)構(gòu)復(fù)用。默認(rèn)情況下@section會(huì)覆蓋內(nèi)容，若需追加則使用@parent。此外可通過(guò)@hasSection判斷內(nèi)容是否存在以控制輸出。合理使用這些指令能提升Laravel視圖的整潔性與維護(hù)性。
When you're working with Blade templates in Laravel, sections are a powerful way to structure and reuse parts of your HTML. They let you define blocks of content in one file (like a view) and then fill them in another (like a layout), which makes it easy to build consistent page structures without repeating code.
What Are @section and @yield?
At the core of Blade's layout system are two directives: @section and @yield.
-
@section('name')...@endsectiondefines a block of content. -
@yield('name')is used in a layout to display the content defined by a section from another file.
For example, if you have a main layout (app.blade.php) that uses @yield('content'), any child view can define what goes into that section using @section('content')...@endsection.
This setup helps keep your layouts clean and modular while allowing flexibility across different pages.
How to Use Layouts with Sections
Blade makes it easy to extend a layout using the @extends directive at the top of your child view.
Here’s how it works:
- Create a layout file, like
resources/views/layouts/app.blade.php. - In that layout, use
@yield()for dynamic content areas. - In your child view, add
@extends('layouts.app'). - Then use
@section('section-name')...@endsectionto fill in each area.
Example layout (app.blade.php):
<html>
<head>
<title>@yield('title')</title>
</head>
<body>
<div class="container">
@yield('content')
</div>
</body>
</html>Child view (home.blade.php):
@extends('layouts.app')
@section('title', 'Home Page')
@section('content')
<h1>Welcome to the Home Page</h1>
<p>This is the main content.</p>
@endsectionThis way, you get a full HTML page where the title and content come from the child view.
Overwriting vs Appending to Sections
One thing to watch out for: sometimes you don’t want to replace a section entirely—you might want to add to it instead.
By default, @section() replaces whatever was there. But if you want to append content, use @parent inside your section.
Let’s say your layout has this:
@section('scripts')
<script src="main.js"></script>
@endsectionAnd in your child view:
@section('scripts')
@parent
<script src="custom.js"></script>
@endsectionThe result will include both main.js and custom.js. Without @parent, only custom.js would show up.
This pattern is useful when including page-specific scripts or styles while keeping global ones intact.
Another common case is defining optional sections. You can check if a section exists using @hasSection():
@if(View::hasSection('sidebar'))
<div class="sidebar">@yield('sidebar')</div>
@endifThat way, the sidebar only shows up if a child view actually defines it.
Using Blade sections well can make your Laravel views much cleaner and easier to maintain. It’s not complicated once you get the flow down, but it does require paying attention to how sections are named and whether they’re being replaced or appended to.
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