JavaScript document.getElementById() Method: Retrieve Elements by ID

The document.getElementById() method is a JavaScript method used to retrieve an element from the HTML document using its unique identifier (ID). It searches the document for an element with the specified ID and returns a reference to that element. This method is commonly used to manipulate the HTML elements on a web page dynamically using JavaScript. The syntax for the method is as follows:

document.getElementById('elementID');

Where 'elementID' is the unique identifier of the HTML element that you want to retrieve.