getElementsByTagName

method returns all of the elements of the specified tag name as an array. The following example gets all paragraph elements of the page and changes their content. JS

let arr = document.getElementsByTagName("p");
for (let x = 0; x < arr.length; x++) {
  arr[x].innerHTML = "Hi there";
}

HTML of the example

<p>Hi</p>
<p>Hey</p>
<p>Hello</p>
<div>Hello there</div>

Note: We used the

length

property of the

array

to loop through all the selected elements in the above example