How to get all the elements in a page?
You used getElementById () to retrieve an element with a specific ID, getElementsByTagName () to get all the elements of a certain type, and getElementsByName () to find all elements with a particular name attribute. However, simply getting these element objects doesn’t really help much.
How to find all elements in a document?
One way is to find all the elements of certain type, such as all h1 elements or all p elements. You can do this using document.getElementsByTagName (): document.getElementsByTagName () returns a collection of all the elements with that particular tag name. For example, this code retrieves the two paragraph elements in the Web page:
How do I get the ID of an element in HTML?
The easiest way to access an element is via its id attribute, because an element’s id is unique in the page. Here’s how it’s done: So, document.getElementById () returns an object representing the element (in this case an HTMLLIElement, or “HTML list item element”, object).
How to retrieve elements from a web page?
In this tutorial you learned how to retrieve any HTML element within a Web page. You used getElementById () to retrieve an element with a specific ID, getElementsByTagName () to get all the elements of a certain type, and getElementsByName () to find all elements with a particular name attribute.
How to add code to a DOM element?
Find out in my next tutorial, Looking inside DOM page elements. To include a block of code in your comment, surround it with tags. You can include smaller code snippets inside some normal text by surrounding them with tags.
How does the DOM represent the content of a page?
In the last DOM article, you learned that the DOM represents the contents of a Web page as a “tree” of JavaScript objects. By accessing the parts of the tree, called the nodes, you can read existing page content, alter content, and even add new content from scratch.