JSFiddle - React, Tailwind, and code Playground

HTML

<textarea></textarea>

JavaScript

$('textarea').keydown(keyDown);


function keyDown(e) {
    
    // press tab.
    if (e.keyCode == 9) {
        e.preventDefault();
        
        // Insert a space.
        var txt = $('textarea').val();
        $('textarea').val(txt + ' ');
        
        return;
    }
}