JSFiddle - React, Tailwind, and code Playground

HTML

<img src="/uploads/lorem_m_1-375x349.png">
<img src="/uploads/ipsum_m_1-248x378.png">
<img src="/uploads/dolor_m_1-392x298.png">

JavaScript

$('img').each(function() {
    var src = $(this).attr('src');
   
    $(this).attr('src',replaceNumbers(src));
    
    console.log($(this).attr('src'));
    
});

function replaceNumbers(str) {
     var regex = /-\d+x\d+/;

    return str.replace(regex,'');     
}