JSFiddle - React, Tailwind, and code Playground

by flackend

HTML

<p></p>

CSS

body {
    font-family: sans-serif;
    
}

JavaScript

var category_id = 4;
var src         = 'http://localhost/images/4-6-.png';
var regexp      = new RegExp('[^\\D]'+ category_id +'\\-')

$('p').append('regexp: '+ regexp +'<br>');
$('p').append(src +'<br>');

src = src.replace(regexp, '');

$('p').append(src);