how to set the id of an element in javascript code example

Example 1: javascript change element id

var element = document.getElementById("oldID");
element.id = "newID";

Example 2: js get id value

var element = document.getElementById("YourElementId");
var value_element = document.getElementById("YourElementId").value;

Example 3: how do i set an id for a div in js

All currently used browsers:
element.id=id;
myElement.id=newId;

element.className=class;
myElement.className=newClassName;

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Html Example