how to write function for edit element in javascript code example

Example 1: javascript element edit value

// example:
document.querySelector(`.guess`).value = 42;

// syntax:
// <element-select>.value = <new-value>;

Example 2: change html element

element.innerHTML =  "<p>read this</p>"	Change the inner HTML of an element
element.style.color = "blue";			Change the style of an HTML element
element.setAttribute(important, "true")	Change the attribute value of an HTML element
element.important = "true"				Change the attribute value of an HTML element