The HTML DOM querySelectorAll() method returns all elements that matches a specific CSS selector specified in its parameter in an HTML document.
Syntax
Following is the syntax −
document.querySelectorAll(“CSS Selector”);
Example
Let us see an example of querySelectorAll() method −
<!DOCTYPE html> <html> <head> <style> html{ height:100%; } body{ text-align:center; color:#fff; background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat; height:100%; } .drop-down{ width:35%; border:2px solid #fff; font-weight:bold; padding:8px; } .btn{ background:#0197F6; border:none; height:2rem; border-radius:2px; width:35%; margin:2rem auto; display:block; color:#fff; outline:none; cursor:pointer; } .show{ font-size:1.5rem; font-weight:bold; } </style> </head> <body> <h1>DOM querySelectorAll() Method Demo</h1> <p class="para">Hi! I'm a paragraph with some random text.</p> <p class="para">This is a awesome paragraph.</p> <p class="para">I'm a <p> element in HTML</p> <button onclick="changeColor()" class="btn">Change all para styles</button> <script> function changeColor() { var paraElements = document.querySelectorAll(".para"); paraElements.forEach((paraElement)=>{ paraElement.style.color="#db133a"; paraElement.style.fontSize="1.2rem"; }); } </script> </body> </html>
Output
This will produce the following output −
Click on “blue” button to change styles of all paragraph elements.