JSFiddle - React, Tailwind, and code Playground

HTML

<p id="text1" class="changeme">
Before Change
</p>
<p id="text2" class="changeme">
Before Change
</p>
<p id="text3" class="changeme">
Before Change
</p>

JavaScript

const textValues = {
	"text1": "text1 new text",
  "text2": "text2 new text",
  "text3": "text3 new text",
}

window.addEventListener('load', () => {
	var texts = Array.from(document.getElementsByClassName("changeme"));
  
  texts.forEach(text => {
  	text.innerHTML = textValues[text.id];
  });
});