JSFiddle - React, Tailwind, and code Playground

by Trufa

HTML

<textarea name="" id="" cols="100" rows="50"></textarea>

JavaScript

var txtArea = $('textarea'),
    newLines = [];
txtArea.on("input",function(){
    var lines = txtArea.val().split('\n');
        
    for(var i = 0;i < lines.length;i++){
        newLines[i] = lines[i].replace(/\>\>\> /, "");
        newLines[i] = newLines[i].replace(/\.\.\.\s?/, "");
        console.log(newLines[i]);
    }
    txtArea.val("");
    newLines.forEach(function(line) {
      txtArea.val(txtArea.val() + line + "\n");
    });
    txtArea.select();
});