通过命令行在无浏览器的jQuery中使用node.js

Question

I am trying to run this script below via the command line

var argv = require('optimist').argv,
$ = require('jquery'),
fs = require('fs');
var file = argv._[0];
var html = fs.readFileSync(file, 'UTF-8');
$(html).find('p').each(function(index) {
var content = $(this).html();
console.log('Paragraph ' + (index + 1) + ': ' + content);
}); //script.js

The command is $ node script.js page.html where page.html is the argument

The error I get is:

./node_modules/jquery/dist/jquery.js:29
                throw new Error( "jQuery requires a window with a document" );
Error: jQuery requires a window with a document
at module.exports (./node_modules/jquery/dist/jquery.js:29:12)
...

I am using jquery-2.1.3. I know that this used to work, once upon a time, but it looks like something has changed.

Also I did follow the instructions at http://rkulla.blogspot.com/2014/04/using-browserify-with-jquery-backbonejs.html but I am still getting the same error.

Any help to fix this error would be greatly appreciated. Thank you very much!

Answer 1

See this answer . The npm package for jQuery no longer includes jsdom , which provides the DOM environment needed to work with jQuery on the server.

On the other hand, you could just use cheerio , an implementation of jQuery for the server, to parse the html and use jQuery's selectors.

Answer 2

var argv = require('optimist').argv,
$ = require('cheerio'),
fs = require('fs');

var file = argv._[0];
...

I could not install jsdom for the life of me so I gave up on that, but cheerio ( npm install worked very smoothly after editing package.json ) solved the problem (see code modification above). Thank you!