Laravel，将JavaScript导入Blade模板的正确方法 [英] Laravel, right way to import javascript into Blade Templates

问题描述

我正在使用Laravel 5.6.此页面不适用于我.

pizza/index.blade.php看起来像这样:

  @extends('layouts.app')@section('内容')<！-样式->< link href ="{{asset('css/pizza.css')}}" rel ="stylesheet"><！-脚本->< script src ="{{asset('js/components/pizza.js')}}"></script>< div class ="container">< div class ="row justify-content-center">< div class ="card">< div class ="card-header"> Pizza</div>< div class ="card-body">< form action ="/pizzas" method ="post">@if($ errors-> any())< div class ="alert alert-danger" role ="alert">请修正以下错误</div>@万一@include('pizza.table')</form></div></div></div></div>@endsection 

pizza/table.blade.php:

 < div class ="pizza-selection">< b>感谢上帝披萨节！选择当天的披萨！</b>< table id ="pizzas" class ="md-box">< tr>...</tr>@foreach($ pizzas as $ pizza)...@endforeach< tr>...< input type ="button" class ="md-box btn btn-default"id ="add_new_pizza" onClick ="addPizza()" value =添加比萨！"></td></tr></table>... 

当我单击"add_new_pizza"按钮时，出现参考错误，onClick ="addPizza()"，未定义addPizza().但是，我尝试将index.blade.php

中的pizza.js导入

 < script src ="{{asset('js/components/pizza.js')}}"></script> 

打印出资产('js/components/pizza.js')返回 http://localhost:8080/js/components/pizza.js 这对我来说很合适.

public/js/components/pizza.js如下所示:

 从'../services/PizzaService.js'导入PizzaService；异步函数addPizza(){//一些功能} 

当我在.blade.php的脚本中具有函数addPizza()时，它也起作用.

此外，如果需要任何其他代码审查，请在GitHub上找到存储库: https://github.com/andrelandgraf/laravel-docker

当我在< script>< script> 中复制pizza.js时，它可以正常工作，但是我收到一个SyntaxError: import声明可能只出现在一个模块.当我通过src导入脚本时，此SyntaxError消失了，就像您在我的代码示例中看到的那样.对我来说，这表明该脚本根本没有加载.

EDIT2&解决方案:我使用了@kerbholz解决方案.我在 app.blade.php 中的 body 底部和 @section中添加了 @stack('scripts')我知道 pizza.js 文件的 @push('stack').

我现在又走了一步，但我仍然收到EDIT中所述的SyntaxError.是否有解决方法?还是我只需要删除 PizzaService.js 的导入并为此文件添加< scipt> -Tag ?

好的，此问题无关.看来浏览器尚不支持ES6模块.

解决方案

@section 块之外的任何内容都不会呈现.

您可以编辑 layouts/app.blade.php 并在要显示样式/javascript的位置添加 @stack('head')(最好在HTML的< head> 部分.

在任何 @extends('layouts.app')的刀片文件中，您都可以使用

  @push('head')<！-样式->< link href ="{{asset('css/pizza.css')}}" rel ="stylesheet"><！-脚本->< script src ="{{asset('js/components/pizza.js')}}"></script>@endpush 

将内容推送到该堆栈中.

有关更多信息，请访问 https://laravel.com/docs/5.6/blade#stacks

I am using Laravel 5.6. This page did not work for me.

pizza/index.blade.php looks like this:

@extends('layouts.app')


@section('content')
    <!-- Styles -->
    <link href="{{ asset('css/pizza.css') }}" rel="stylesheet">
    <!-- Scripts -->
    <script src="{{ asset('js/components/pizza.js')}}"></script>
    <div class="container">
        <div class="row justify-content-center">
            <div class="card">
                <div class="card-header">Pizza</div>
                <div class="card-body">
                    <form action="/pizzas" method="post">
                        @if ($errors->any())
                            <div class="alert alert-danger" role="alert">
                                Please fix the following errors
                            </div>
                        @endif
                        @include('pizza.table')
                    </form>
                </div>
            </div>
        </div>
    </div>
@endsection

pizza/table.blade.php:

<div class="pizza-selection">
    <b>Thanks god its pizza day! Select your pizza of the day!</b>
    <table id="pizzas" class="md-box">
        <tr>
            ...
        </tr>
        @foreach ($pizzas as $pizza)
            ...
        @endforeach
        <tr>
            ...
            <input type="button" class="md-box btn btn-default" 
             id="add_new_pizza" onClick="addPizza()" value="Add Pizza!">
            </td>
        </tr>
    </table>
    ...

I get a reference error when I click on the "add_new_pizza" button, onClick="addPizza()", addPizza() is not defined. However, I try to import pizza.js in index.blade.php

<script src="{{ asset('js/components/pizza.js')}}"></script>

printing out asset('js/components/pizza.js') returns http://localhost:8080/js/components/pizza.js which looks right to me.

public/js/components/pizza.js looks like follows:

import PizzaService from '../services/PizzaService.js';

async function addPizza(){
    // some functionality
}

It also worked when I had the function addPizza() inside the script at .blade.php.

Also, find the repository on GitHub if you need any further code reviews: https://github.com/andrelandgraf/laravel-docker

EDIT: When I copy the pizza.js inside <script><script> it works fine, but I receive a SyntaxError: import declarations may only appear at top level of a module. This SyntaxError dissapears when I import the script via src like you can see in my code examples. For me, this indicates that the script is not loaded at all.

EDIT2 & Solution: I used @kerbholz solution. I added @stack('scripts') to the bottom of the body in app.blade.php and inside @section('content') of index.blade.php I know @push('stack') the pizza.js file.

I am now one step further but I still receive the SyntaxError stated in EDIT. Is there a workaround for that or do I just have to remove the import of PizzaService.js and add a <scipt>-Tag for this file as well?

EDIT3: Okay this issue is not related. It looks like ES6 modules are not yet supported by browsers.

解决方案

Anything outside of your @section block will not be rendered.

You could edit your layouts/app.blade.php and add a @stack('head') where you want your styles/javascript to appear (preferably in the <head> section of your HTML).

In any blade file that @extends('layouts.app') you can then use

@push('head')
<!-- Styles -->
<link href="{{ asset('css/pizza.css') }}" rel="stylesheet">
<!-- Scripts -->
<script src="{{ asset('js/components/pizza.js')}}"></script>
@endpush

to push content into that stack.

For more information visit https://laravel.com/docs/5.6/blade#stacks

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