javascript 使用未捕获的引用错误:未定义$

gc0ot86w  于 2023-03-28  发布在  Java
关注(0)|答案(1)|浏览(203)

在我的Rails 6项目中,我一直在尝试使用资产管道来让application.js使用jQuery和app/assets/javascript/event_index.js处的JavaScript文件,但两者都不起作用。当我加载网页时,我得到了一个Uncaught ReferenceError: $ is not defined,当我点击东西时,我的JavaScript代码没有做任何事情。
我尝试过的事情:

  • this StackOverflow question的最佳答案表明,我可以编写//=require events_index来获取events_index. js,但这并没有做任何事情
  • 我没有意识到我的//= require行必须在header中。当我改变它时,它仍然没有帮助
  • 我跑了gem 'jquery-rails'
  • 我以前使用的是$(document).ready(),但显然因为Rails 6使用TurboLinks,所以它不再起作用,所以我更改了它

以下是我的application.js文件的全文:

// This file is automatically compiled by Webpack, along with any other files
// present in this directory. You're encouraged to place your actual application logic in
// a relevant structure within app/javascript and only use these pack files to reference
// that code so it'll be compiled.

//= require jquery
//= require jquery_ujs
//= require bootstrap
//= require events_index

require("@rails/ujs").start()
require("turbolinks").start()
require("@rails/activestorage").start()
require("channels")

// Uncomment to copy all static images under ../images to the output folder and reference
// them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
// or the `imagePath` JavaScript helper below.
//
// const images = require.context('../images', true)
// const imagePath = (name) => images(name, true)

$( document ).on('turbolinks:load', function() {
    console.log( "ready!" );
});

谢谢你的帮助!

zpgglvta

zpgglvta1#

Rails 6默认自带webpacker,你应该通过yarn安装jquery并通过webpacker加载它。

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