How to trim a file extension from a String in JavaScript?

Question

For example, assuming that x = filename.jpg, I want to get filename, where filename could be any file name (Let\'s assume the file nam

Answer 1

var fileName = "something.extension";
fileName.slice(0, -path.extname(fileName).length) // === "something"

Answer 2

In node.js, the name of the file without the extension can be obtained as follows.

const path = require('path');
const filename = 'hello.html';

path.parse(filename).name; // hello
path.parse(filename).ext;  // .html

Further explanation at Node.js documentation page.

Answer 3

Another one-liner:

x.split(".").slice(0, -1).join(".")

Answer 4

x.slice(0, -(x.split('.').pop().length + 1));

Answer 5

Not sure what would perform faster but this would be more reliable when it comes to extension like .jpeg or .html

x.replace(/\.[^/.]+$/, "")

Answer 6

x.length-4 only accounts for extensions of 3 characters. What if you have filename.jpegor filename.pl?

EDIT:

To answer... sure, if you always have an extension of .jpg, x.length-4 would work just fine.

However, if you don't know the length of your extension, any of a number of solutions are better/more robust.

x = x.replace(/\..+$/, '');

OR

x = x.substring(0, x.lastIndexOf('.'));

OR

x = x.replace(/(.*)\.(.*?)$/, "$1");

OR (with the assumption filename only has one dot)

parts = x.match(/[^\.]+/);
x = parts[0];

OR (also with only one dot)

parts = x.split(".");
x = parts[0];