Laravel 5.4 脚本加载问题

Question

I'm working on my first Laravel project (5.4), actually I don't understand why my js script doesn't work like I expected.我正在做我的第一个 Laravel 项目（5.4），实际上我不明白为什么我的 js 脚本不能像我预期的那样工作。 I use Mix and Blade :我使用 Mix 和 Blade ：

// webpack.mix.js
let { mix } = require('laravel-mix').mix;

    // copy fonts and patterns
mix .copy('resources/assets/vendor/bootstrap/fonts', 'public/fonts')
    .copy('resources/assets/vendor/font-awesome/fonts', 'public/fonts')
    .copy('resources/assets/patterns', 'public/css/patterns')

    // compile scss and concatenate css files
    .sass('resources/assets/sass/app.scss', 'public/css')
    .styles([
        'resources/assets/vendor/bootstrap/css/bootstrap.css',
        'resources/assets/vendor/animate/animate.css'
        // ...
    ], 'public/css/vendor.css')

    // concatenate js files
    .js([
        'resources/assets/vendor/jquery/jquery-3.1.1.min.js',
        'resources/assets/vendor/bootstrap/js/bootstrap.js',
        'resources/assets/js/app.js'
        // ...
    ], 'public/js/app.js')
    .options({ processCssUrls: false }); // fix for path issue : https://github.com/almasaeed2010/AdminLTE/issues/1360

After npm run dev compliation looks good : npm run dev编译后看起来不错：

DONE  Compiled successfully in 6497ms                                                     4:20:57 PM

                                   Asset      Size  Chunks                    Chunk Names
  fonts/glyphicons-halflings-regular.ttf   45.4 kB          [emitted]         
                              /js/app.js    1.2 MB       0  [emitted]  [big]  /js/app
                       mix-manifest.json  66 bytes          [emitted]         
  fonts/glyphicons-halflings-regular.eot   20.1 kB          [emitted]         
fonts/glyphicons-halflings-regular.woff2     18 kB          [emitted]         
  fonts/glyphicons-halflings-regular.svg    109 kB          [emitted]         
 fonts/glyphicons-halflings-regular.woff   23.4 kB          [emitted]         
                            /css/app.css    178 kB       0  [emitted]         /js/app
           fonts/fontawesome-webfont.ttf    166 kB          [emitted]         
           fonts/fontawesome-webfont.svg    444 kB          [emitted]  [big]  
           fonts/fontawesome-webfont.eot    166 kB          [emitted]         
          fonts/fontawesome-webfont.woff     98 kB          [emitted]         
         fonts/fontawesome-webfont.woff2   77.2 kB          [emitted]         
                   fonts/FontAwesome.otf    135 kB          [emitted]         
         css/patterns/header-profile.png   5.88 kB          [emitted]

CSS works fine, bootstrap.js also works and when I check inside /js/app.js it seems like everything is inside. CSS 工作正常，bootstrap.js 也可以工作，当我检查/js/app.js ，似乎一切都在里面。

An here is my tempate :这是我的模板：

{{-- app.blade.php--}}
<!DOCTYPE html>
<html lang="{{ config('app.locale', 'en') }}">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>@yield('title')</title>
    <link rel="stylesheet" href="{!! asset('css/vendor.css') !!}" />
    <link rel="stylesheet" href="{!! asset('css/app.css') !!}" />
</head>
<body>
    <!-- Main view  -->
    @yield('content')

    <script src="{!! asset('js/app.js') !!}" type="text/javascript"></script>

    @section('scripts')
    @show
</body>
</html>

My troubles began when I want to add a script inside the script section from a child.当我想在孩子的脚本部分中添加脚本时，我的麻烦就开始了。

@extends('layouts.app')

@section('scripts')
    <script type="text/javascript">
        $(document).ready(function () {
            alert('test');
        });
    </script>
@endsection

I got Uncaught ReferenceError: $ is not defined like if jquery wasn't loaded.我得到了Uncaught ReferenceError: $ is not defined就像没有加载 jquery 一样。

I have no clue why, any idea ?我不知道为什么，知道吗？

[note] [笔记]
It works if I replace inside app.blade.php :如果我在app.blade.php 中替换它，它会起作用：

<script src="{!! asset('js/app.js') !!}" type="text/javascript"></script>

with :和：

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

Answer 1

I finally figure who was guilty : Mix (or the way I used Mix)我终于弄清楚谁有罪：Mix（或我使用 Mix 的方式）

I wrongly believed that mix.js and mix.scripts was the same function.我错误地认为mix.js和mix.scripts是同一个函数。 But mix.scripts only combine and minify files while mix.js also do compiling ECMAScript 2015 and module bundling.但是mix.scripts只合并和缩小文件，而mix.js也编译 ECMAScript 2015 和模块捆绑。 I don't really know why but it was a problem in my case.我真的不知道为什么，但这对我来说是个问题。

mix.js(['public/js/admin.js',
    'public/js/dashboard.js'], 'public/js');

replaced by :取而代之：

mix.scripts(['public/js/admin.js',
    'public/js/dashboard.js'], 'public/js/all.js');

See more : Laravel doc查看更多： Laravel 文档

Answer 2

I had a similar issue, and the problem was that at the moment I was using jQuery for the first time, the app.js file generated by webpack wasn't loaded yet.我遇到了类似的问题，问题是我第一次使用jQuery的时候，webpack生成的app.js文件还没有加载。

You can do a simple test to see if you have the same issue.你可以做一个简单的测试，看看你是否有同样的问题。 In your first chunk of code where you use jQuery (the line of code that throws you the $ error), wrap that code in this:在您使用 jQuery 的第一段代码（抛出 $ 错误的代码行）中，将该代码包装为：

document.addEventListener("DOMContentLoaded", function(event) { 
 // Your jQuery code
});

One workaround is to load app.js earlier in your blade main layout file, but I am sure it can be done in a better way.一种解决方法是在您的刀片主布局文件中更早地加载app.js ，但我相信它可以以更好的方式完成。 I am fairly new to Laravel, so I am still figuring out these kinds of things...我对 Laravel 相当陌生，所以我仍在弄清楚这些事情......

Edit:编辑：

Ok, I think I understood now how to do it properly:好的，我想我现在明白如何正确地做到这一点：

In your main blade layout (in my case app.blade.php ), at the bottom right before the </body> tag, load your webpack script, all other external scripts you might load, and finally add a yield scripts section.在你的主要刀片布局（在我的例子中app.blade.php ）中，在</body>标签前的右下角，加载你的 webpack 脚本，你可能加载的所有其他外部脚本，最后添加一个 yield 脚本部分。

Example:例子：

<script src="/js/app.js"></script>
<script src="other/scripts/that/you/need.js"></script>
@yield('scripts')

In the blade template where you need jQuery code, instead of adding it directly in the content section, you create a new section called scripts .在需要 jQuery 代码的刀片模板中，不是直接在内容部分中添加它，而是创建一个名为scripts的新部分。

Example:例子：

@section('content')
//Your view code
@endsection

@section('scripts')
//Your jQuery code
@endsection

That way, your jQuery code is loaded after the main layout has already loaded the webpack javascript file (which loads jQuery).这样，您的 jQuery 代码在主布局已经加载 webpack javascript 文件（加载 jQuery）之后加载。

Answer 3

Simply include js file as shown below in your blade files as in my case I'm including add-section.js which is placed inside public/js只需在您的刀片文件中包含如下所示的 js 文件，就我而言，我将包含放置在 public/js 中的 add-section.js

<script src="{{ asset('/js/add-section.js') }}"></script>
@yield('scripts')

Laravel 5.4 脚本加载问题

问题描述

3 个解决方案

解决方案1
3 已采纳 2017-03-31 21:32:13

解决方案2
2 2017-03-31 07:54:17

解决方案3
0 2017-05-22 09:11:43

Laravel 5.4 脚本加载问题

问题描述

3 个解决方案

解决方案1 3 已采纳 2017-03-31 21:32:13

解决方案2 2 2017-03-31 07:54:17

解决方案3 0 2017-05-22 09:11:43

解决方案1
3 已采纳 2017-03-31 21:32:13

解决方案2
2 2017-03-31 07:54:17

解决方案3
0 2017-05-22 09:11:43