Is there a way to create and run javascript in Chrome?

Question

Is there a way, like an extension or application, in Chrome to create and run .js files in Chrome?

Answer 1

Try this:
1. Install Node.js from https://nodejs.org/
2. Place your JavaScript code into a .js file (e.g. someCode.js)
3. Open a cmd shell (or Terminal on Mac) and use Node's Read-Eval-Print-Loop (REPL) to execute someCode.js like this:
> node someCode.js

Hope this helps!

Answer 2

You don't necessarily need to have an HTML page. Open Chrome, press Ctrl+Shift+j and it opens the JavaScript console where you can write and test your code.

- Chrome JavaScript Console

Answer 3

You need an HTML page to load a JS file.

Answer 4

You can also open your js file path in the chrome browser which will only display text.

However you can dynamically create the page by including:

var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'myjs.js';
document.head.appendChild(script);

Now you can have access to the js variables and functions in the console.

Now when you explore the elements it should have included.

So not i guess you dont need a html file.

Answer 5

How to create a Javascript Bookmark in Chrome:

You can use a Javascript bookmark: https://helloacm.com/how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example/. Just create a bookmark to look like this:

Ex:

Name:

Test javascript bookmark in Chrome

URL:

javascript:alert('Hello world!');

Just precede the URL with javascript:, followed by your Javascript code. No space after the colon is required.

Here's how it looks as I'm typing it in:

Now save and then click on your newly-created Javascript bookmark, and you'll see this:

You can do multi-line scripts too. If you include any comments, however, be sure to use the C-style multi-line comments ONLY (/* comment */), and NOT the C++-style single-line comments (// comment), as they will interfere. Here's an example:

URL:

javascript:

/* This is my javascript demo */

function multiply(a, b) 
{
    return a * b;
}

var a = 1.4108;
var b = 3.7654;
var result = multiply(a, b);
alert('The result of ' + a + ' x ' + b + ' = ' + result.toFixed(4));

And here's what it looks like as you edit the bookmark, after copying and pasting the above multi-line script into the URL field for the bookmark:

.

And here's the output when you click on it:

References:

1. https://superuser.com/questions/192437/case-sensitive-searches-in-google-chrome/582280#582280
2. https://gist.github.com/borisdiakur/9f9d751b4c9cf5acafa2
3. Google search for "chrome javascript() in bookmark"
4. https://helloacm.com/how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example/
5. https://helloacm.com/how-to-write-chrome-bookmark-scripts-step-by-step-tutorial-with-a-steemit-example/
6. https://javascript.info/hello-world
7. JavaScript equivalent to printf/String.Format

Answer 6

Open a basic text editor and type out your html. Save it as .html If you type in file:///C:/ into the address bar you can then navigate to your chosen file and run it. If you want to open a file that is on a server type in file:/// and instead of C:/ the first letter of the server followed by :/.