javascript 将 JQuery 与 Node.js “ReferenceError: $ is not defined”一起使用

Using JQuery with Node.js "ReferenceError: $ is not defined"

提问by Exuviax

I am trying to build a simple IRC bot for Twitch in Node.js with this framework https://github.com/Schmoopiie/twitch-ircthat can connect to the API and check certain things, in this reference I will be checking the followers on the current channel the bot is located in. Except I am running into an error, I keep getting this error logged below.

我正在尝试使用此框架在 Node.js 中为 Twitch 构建一个简单的 IRC 机器人https://github.com/Schmoopiie/twitch-irc可以连接到 API 并检查某些事情，在本参考中我将检查机器人所在的当前频道上的关注者。除了我遇到错误之外，我一直在下面记录此错误。

[31mcrash[39m: ReferenceError: $ is not defined
    at client.<anonymous> (C:\Users\Exuviax\Desktop\node.js\bot.js:157:9)
    at client.emit (events.js:117:20)
    at C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\library\client.js:657:30
    at Object.createChannelUserData (C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\library\data.js:56:2)
    at client._handleMessage (C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\library\client.js:651:22)
    at Stream.emit (events.js:95:17)
    at drain (C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\node_modules\irc-message-stream\node_modules\through\index.js:36:16)
    at Stream.stream.queue.stream.push (C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\node_modules\irc-message-stream\node_modules\through\index.js:45:5)
    at LineStream.<anonymous> (C:\Users\Exuviax\Desktop\node.js\node_modules\twitch-irc\node_modules\irc-message-stream\index.js:22:16)
    at LineStream.emit (events.js:95:17)

This is the code that I am using to run, in order to check the API

这是我用来运行的代码，以检查 API

var irc = require('twitch-irc');
var colors = require('colors');
var jQuery = require('jQuery')
var jsdom = require("jsdom");
var window = jsdom.jsdom().parentWindow;

jsdom.jQueryify(window, "http://code.jquery.com/jquery-2.1.3.min.js", function () {
  var $ = window.$;
  $("body").prepend("<h1>The title</h1>");
  console.log($("h1").html());
});

// Calling a new client..
var client = new irc.client({
    options: {
        debug: true,
        debugIgnore: ['ping', 'chat', 'action'],
        logging: true,
        tc: 3
    },
    identity: {
        username: 'BotName',
        password: 'oauth:Code'
    },
    channels: ['#my', '#first', '#connect', '#channels']
});

// Connect the client to server..
client.connect();

client.addListener('chat', function(channel, user, message) {
    if (message.indexOf('!followers') === 0) {
        var channels = channel
        channels = channels.replace('#', '');
        $.getJSON('https://api.twitch.tv/kraken/channels/' + channels + '.json?callback=?', function(data) {
            var followers = data.followers
            client.say(channel, "Current Followers: " + followers);
            console.log("Followers for " + channel + " " + followers);
        });
    }

});

I have been attempting to get this refferenceerror to go away for hours, but I am just not familiar enough with using JS and JQ outside of the browser environment to produce any results, any insight would be much appreciated.

我一直试图让这个引用错误消失几个小时，但我对在浏览器环境之外使用 JS 和 JQ 来产生任何结果还不够熟悉，任何见解都将不胜感激。

回答by d13

Juhana Jan provided the correct answer in the comments to the original question:

Juhana Jan 在对原始问题的评论中提供了正确答案：

When you say var jQuery = require('jQuery') you're assigning jQuery to a variable called jQuery. If you want to use $ instead you'll have to do var $ = require('jQuery'). – Juhana Jan

当您说 var jQuery = require('jQuery') 时，您将 jQuery 分配给名为 jQuery 的变量。如果你想使用 $ 代替你必须做 var $ = require('jQuery')。— 朱哈娜·扬

回答by Konkret

Be sure to use the $symbol equals require('jquery')insideeach module you will be using jQuery.

请确保在您将使用 jQuery 的每个模块中使用$符号 equals 。require('jquery')

The proper syntax is:

正确的语法是：

var $ = require("jquery");

For more information visit package.

欲了解更多信息，请访问包。