如何使用npm jquery模块？

Question

How should I require the jquery in node if I use it in multiple modules? Should I define it as a global or should I just use the require('jquery )` in every module I need it?

I am getting an error when trying to use the package.

TypeError: Object function ( w ) {
            if ( !w.document ) {
                throw new Error( "jQuery requires a window with a document" );
            }
            return factory( w );
        } has no method 'isArray'

It looks like a bug in the current release as it should not check if I am running it in a browser according to the official documentation. This issue is also mentioned in another post . It works with version 1.8.3 as mentioned in one of the answers.

Answer 1

To use jquery in node, you need to have two separate node package installations.

1. jquery
2. jsdom to create a dummy window object which jquery can use.

Installation:

npm install jquery
npm install jsdom

In code:

var jsdom = require("jsdom").jsdom;
global.$ = require('jquery/dist/jquery')(jsdom().createWindow());

Or, with newer versions of jsdom:

require("jsdom").env("", function(err, window) {
    if (err) {
        console.error(err);
        return;
    }

    var $ = require("jquery")(window);
});

Using global.$ will make the jquery object($) available globally in your project.

Answer 2

You can use as below to handle as usual:

var $;
$ = require('jquery');
$('.tag').click(function() {
  return console.log('clicked');
});

Answer 3

If you are using jQuery for client purposes this is how I did it and I am on MEAN stack using jade templating engine.

For example; Let's say I have simple layout.jade like this

I will be using all jquery functionality on a single page app via index.jade and I will be loading like this.

```

extends layout

block content
    script(type='text/javascript', src="http://code.jquery.com/jquery-1.9.1.min.js")

    div#container(style="min-width: 500px; height: 500px; margin: 0 auto")
    script.
        if (jQuery) {
            console.log("jQuery library is loaded!");
        } else {
            console.log("jQuery library is not found!");
        }

        $(function () {

        });


    h1= title
    p Welcome to #{title}

```