how to override text in css code example

Example 1: css change text

IDENTIFIER {
	visibility: hidden;
	position: relative;
}
IDENTIFIER::after {
	visibility: visible;
	position: absolute;
	top: 0;
	left: 0;
	content: "NEW_CONTENT";
}

Example 2: css change the button text value

document.getElementById("myButton").innerHTML="new button text";