element id javascript code example

Example 1: javascript get element by id

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

Example 2: javascript change element id

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

Example 3: id in css

#id{
    color:red;
}

Example 4: get id of element javascript

var element = document.getElementsByTagName("div")[0];
var id = element.id;

Example 5: js get id value

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