What is the difference between GetElementByID and GetElementsByTagName?

What is the difference between GetElementByID and GetElementsByTagName?

The difference is that GetElementByID() will retrieve a single element object based on the unique id specified, whereas GetElementsByTagName() will retrieve an array of all element objects with the specified tag name. Then you can obtain the value using GetElementById from your C++ code.

How do I get DOM element?

The easiest way to access a single element in the DOM is by its unique ID. You can get an element by ID with the getElementById() method of the document object.

What is document getElementsByTagName in JavaScript?

The getElementsByTagName() method returns a collection of all elements with a specified tag name. The getElementsByTagName() method returns an HTMLCollection. The getElementsByTagName() property is read-only.

Does getElementsByTagName return an array?

getElementsByTagName – the method name itself implies that it will return multiple elements – i.e. an array. The method always returns an array, with the length equal to the number of matching elements. As such you must always access the elements by the index of the element in the array.

What is the difference between document getElementById?

Definition and Usage The getElementById() method returns an element with a specified value. The getElementById() method returns null if the element does not exist. The getElementById() method is one of the most common methods in the HTML DOM. It is used almost every time you want to read or edit an HTML element.

Why we use get element by ID?

getElementById() The Document method getElementById() returns an Element object representing the element whose id property matches the specified string. Since element IDs are required to be unique if specified, they’re a useful way to get access to a specific element quickly.

How do I access DOM value?

One of the most common methods to access an element in HTML DOM is getElementById() which accesses an element based on the value of its ID attribute. The value of the ID attributes are supposed to be unique and no two elements on a single HTML page should have similar IDs.

What is DOM function in JavaScript?

The DOM defines a standard for accessing documents: “The W3C Document Object Model (DOM) is a platform and language-neutral interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document.”

What is HTML page element?

An HTML element is a component of an HTML document that tells a web browser how to structure and interpret a part of the HTML document. HTML elements can contain formatting instructions, semantic meaning, and content.

Does GetElementsByTagName return an array?

What does the innerText give you?

The innerText property of the HTMLElement interface represents the rendered text content of a node and its descendants. As a getter, it approximates the text the user would get if they highlighted the contents of the element with the cursor and then copied it to the clipboard.

What can I use instead of document getElementById?

A commonly-used alternative to document. getElementById is using a jQuery selector which you read about more here.

Is it better to use querySelector or getElementById?

You should opt to use the querySelector method if you need to select elements using more complex rules that are easily represented using a CSS selector. If you want to select an element by its ID, using getElementById is a good choice.