JSFiddle - React, Tailwind, and code Playground
by btevfik
HTML
<span id="span1">This is Outside Text.
<span id="span2">This is Inside Text</span>
Some other text.
</span>
JavaScript
var element = document.getElementById("span1");
var element2 = document.getElementById("span2");
var text = element.textContent.replace(element2.textContent, "");
//if you want to remove new line
text = text.replace(/(\r\n|\n|\r)/gm,"");
alert(text);