Use the document.body property in JavaScript to get the body of the document i.e. <body> tag.
Example
You can try to run the following code to implement document.body property in JavaScript.
<!DOCTYPE html> <html> <head> <title>JavaScript Example</title> </head> <body> <p>Demo Text</p> <script> document.body.style.backgroundColor = "blue"; </script> </body> </html>