JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="testContent"> <img src="..." alt="value"> My text.... </textarea>

JavaScript

var text = document.getElementById("testContent").innerHTML;
var tmp = text.split("alt=\"")[1];
var value = tmp.split("\"")[0];
var myText = tmp.split("\"&gt;")[1];
alert(value+" "+myText);