Rails 6 + Webpacker: Uncaught TypeError: $(...).select2 is not a function

Question

我试图让 select2 在我的应用程序中工作，但无法做到。我已经通过 yarn add select2 添加了它。下面是我的代码

javascript/packs/application.js

// 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("@rails/ujs").start()
require("turbolinks").start()
require("@rails/activestorage").start()
require("channels")
require("jquery")
require("bootstrap")
require("tempusdominus-bootstrap-4")
require("moment/locale/ja")
require('select2')


// stylesheets
require("../stylesheets/application.scss")

import "@fortawesome/fontawesome-free/css/all.css";
import "./owl.carousel.min.js";
import 'select2';
import 'select2/dist/css/select2.css';

$(document).ready(function(){ 
    $('.customers-dropdown').select2();
    $("select").change(function(event) {
        $("#extra_price").html(formatCurrency($("#extra_" + $(".select").val()).html()));
        computetotal(event); 
    });

    $('#inlineDatepicker').datetimepicker({
        inline: true,
        sideBySide: false,
        format: 'L',
        useCurrent: false,
        defaultDate: $('#weekStardate').val(),
    
    });

    $("#inlineDatepicker").on("change.datetimepicker", ({date, oldDate}) => {   
        var fdate = moment(date)        
        $('#weekStardate').val(fdate.format("D/M/YYYY")) 
     })
        
});

package.json

{
  "name": "rails_6_devise_example",
  "private": true,
  "dependencies": {
    "@fortawesome/fontawesome-free": "^5.14.0",
    "@rails/actioncable": "^6.0.0-alpha",
    "@rails/activestorage": "^6.0.0-alpha",
    "@rails/ujs": "^6.0.0-alpha",
    "@rails/webpacker": "^5.2.1",
    "bootstrap": "^4.5.2",
    "bootstrap-datepicker": "^1.9.0",
    "jquery": "^3.5.1",
    "moment": "^2.27.0",
    "node-sass": "^4.12",
    "popper.js": "^1.16.1",
    "rails-ujs": "^5.2.4-3",
    "select2": "^4.1.0-rc.0",
    "tempusdominus-bootstrap-4": "^5.1.2",
    "turbolinks": "^5.2.0"
  },
  "version": "0.1.0",
  "devDependencies": {
    "webpack-dev-server": "^3.8.1"
  }
}

我得到 Uncaught TypeError: $(...).select2 is not a function。我查看了很多帖子，按照建议，我尝试在 import 'select2'; 上方添加 import $ from 'jquery'; 这有效，但会破坏 datetimepicker 导致 Uncaught TypeError: jquery__WEBPACK_IMPORTED_MODULE_2___default(...)(...).datetimepicker is not a function 我不知道发生了什么。

非常感谢任何帮助，谢谢！

Answer 1

我很快就准备好了代码，它运行良好。我刚刚将其添加到插件中：

new webpack.ProvidePlugin({
  $: 'jquery',
  jQuery: 'jquery',
  'window.jQuery': 'jquery',
  moment: 'moment'
})

我也更改了顺序，因为那是 turbolink 想要的 ;)

require("jquery")
require("bootstrap")
require("tempusdominus-bootstrap-4")
require("moment/locale/ja")
require("turbolinks").start()
require('select2')

当然有一些错误，但我想念 formatCurrency 但最重要的事情是有效的:)

Rails 6 + Webpacker: Uncaught TypeError: $(...).select2 is not a function

Rails 6 + Webpacker: Uncaught TypeError: $(...).select2 is not a function

javascript

ruby-on-rails

webpack

ruby-on-rails-6