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Note: This question is not a duplicate of other existing questions because this question does not use jsdom.env() function call which older version of JSDOM use.
File bar.js:
console.log('bar says: hello')
File foo.js:
var jsdom = require('jsdom')
var html = '<!DOCTYPE html><head><script src="bar.js"></script></head><body><div>Foo</div></body>'
var window = new jsdom.JSDOM(html).window
window.onload = function () {
console.log('window loaded')
}
When I run foo.js, I get this output.
$ node foo.js
window loaded
Why did bar says: hello output did not come? It looks like bar.js was not loaded. How can I make jsdom load the file in the script tag?
[EDIT/SOLUTION]: Problem solved after following a suggestion in the answer by Quentin. This code works:
var jsdom = require('jsdom')
var html = '<!DOCTYPE html><head><script src="bar.js"></script></head><body><div>Foo</div></body>'
var window = new jsdom.JSDOM(html, { runScripts: "dangerously", resources: "usable" }).window
window.onload = function () {
console.log('window loaded')
}
311
Go to the JSDOM homepage.
Skim the headings until you find one marked Executing scripts
To enable executing scripts inside the page, you can use the
runScripts: "dangerously"option:const dom = new JSDOM(`<body> <script>document.body.appendChild(document.createElement("hr"));</script> </body>`, { runScripts: "dangerously" }); // The script will be executed and modify the DOM: dom.window.document.body.children.length === 2;Again we emphasize to only use this when feeding jsdom code you know is safe. If you use it on arbitrary user-supplied code, or code from the Internet, you are effectively running untrusted Node.js code, and your machine could be compromised.
If you want to execute external scripts, included via
<script src="">, you'll also need to ensure that they load them. To do this, add the optionresources: "usable"as described below.
58
answered Oct 14 '22 15:10
Given I was unable to reproduce the url-based solution from the code above...
Read the various .js files, inject them as string into the html page. Then wait the page to load as in a normal navigator.
These libraries are loaded into _window = new JSDOM(html, { options }).window; and therefor available to your node script.
This is likely to prevent you from doing xhr calls and therefore only partially solve the issue.
say-hello.js
// fired when loaded
console.log("say-hello.js says: hello!")
// defined and needing a call
var sayBye = function(name) {
var name = name ||'Hero!';
console.log("say-hello.js says: Good bye! "+name)
}
main.js:
const fs = require("fs");
const jsdom = require("jsdom");
const { JSDOM } = jsdom;
var NAME = process.env.NAME; // variable from terminal
var html = '<!DOCTYPE html><head></head><body><div>Foo</div></body>'
var _window = new JSDOM(html, {
runScripts: "dangerously",
resources: "usable" }).window;
/* ************************************************************************* */
/* Add scripts to head ***************************************************** */
var jsFiles = [
'say-hello.js'
];
var scriptsContent = ``;
for(var i =0; i< jsFiles.length;i++){
console.log(__dirname + '/'+ jsFiles[i])
let scriptContent = fs.readFileSync( jsFiles[i], 'utf8');
scriptsContent = scriptsContent + `
/* ******************************************************************************************* */
/* `+jsFiles[i]+` **************************************************************************** */
`+scriptContent;
};
let scriptElement = _window.document.createElement('script');
scriptElement.textContent = scriptsContent;
_window.document.head.appendChild(scriptElement);
/* ************************************************************************* */
/* Run page **************************************************************** */
_window.document.addEventListener('DOMContentLoaded', () => {
console.log('main says: DOMContentLoaded')
// We need to delay one extra turn because we are the first DOMContentLoaded listener,
// but we want to execute this code only after the second DOMContentLoaded listener
// (added by external.js) fires.
_window.sayBye(NAME); // prints "say-hello.js says: Good bye!"
});
Run it:
NAME=John node main.js # expects hello and good bye to john messages
Source:
28
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