This video on getElementsByTagName() method in JavaScript will let you know the more profound concept of accessing any element in JavaScript with the help tag name. In addition, you'll also understand How tag name() method from the getElementById() method in JavaScript.

Below are the points we are going to discuss in this JavaScript tutorial for beginners.
00:00:00 Introduction
00:03:17 Adding functionality using JavaScript.
00:05:14 Changing style of an element.
00:12:34 Uniqueness of Id attribute.

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What is a GetElementsByTagName() method in JavaScript?
This method is used to access a bunch of elements with the same name present in HTML document. You can use it for different purposes like if you want to make changes in all the div tags present in an HTML document, you have two options One is to use the id attribute but it's not possible to assign id to each element separately. That's where the TagName() method comes into play and it can be used to access all the elements with the same name present in the HTML file. This method returns an HTML collection in the form of an Array and one can access any one or all the elements present in the Array.

Introduction to JavaScript:
JavaScript is a scripting language that is used to create and manage dynamic web pages, basically anything that moves on your screen without requiring you to refresh your browser. It can be anything from animated graphics to an automatically generated Facebook timeline. When most people get interested in web development, they start with good old HTML and CSS. From there, they move on to JavaScript, which makes sense, because, these three elements together form the backbone of web development. HTML is the structure of your page like the headers, the body text, any images you want to include. It basically defines the contents of a web page. CSS controls how that page looks (it’s what you’ll use to customize fonts, background colors, etc.). JavaScript is the third element. Once you’ve created your structure (HTML) and your aesthetic vibe (CSS), JavaScript makes your site dynamic (automatically updateable).

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