javascript: Detect and remove invisible characters when pasting text

Question

I copied a text from a source and pasted it in a textarea.
In the textarea, the text looks OK, but when I paste the text in a text editor like Sublime Text, here's what I see : the string contains some invisible characters in place of 2 spaces (<0x03>).

What are these characters ? Where do they come from ?
With Javascript, how can I detect these and replace with "real" spaces

Thank you.

Answer 1

The most easy way to do this just use replace method

let inputString = "Lorem ipsum <0x03> dolor <0x03>";

let modifiedString = inputString.replace(/<0x03>/g, ' ');

console.log(modifiedString);

UPDATE:

For finding character with code we can use regular expression:

let inputString = "Lorem ipsum <0x03> dolor <0x03>";

let modifiedString = inputString.replace(/\x03/g, ' ');


console.log(modifiedString);