What does getElementsByTagName return?

What does getElementsByTagName return?

getElementsByTagName() method returns a live HTMLCollection of elements with the given tag name. All descendants of the specified element are searched, but not the element itself. The returned list is live, which means it updates itself with the DOM tree automatically. Therefore, there is no need to call Element.

Does getElementsByTagName return a NodeList?

3 Answers. getElementsByTagName returns a NodeList object, which is Array -like in the sense that it prototypes arbitrary numeric indices onto it. You should not use a for..in loop to enumerate through a NodeList .

Does getElementsByTagName return an array?

getElementsByTagName – the method name itself implies that it will return multiple elements – i.e. an array.

What is the syntax of getElementsByTagName ()?

The getElementsByTagName() method in HTML returns the collection of all the elements in the document with the given tag name. To extract any info just iterate through all the elements using the length property. Syntax: var elements = document.

Can getElementsByTagName return null?

GetElementsByTagName returns null. Message=Object reference not set to an instance of an object.

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.

What is the difference between querySelector and getElementsByTagName?

getElementsByTagName only selects elements based on their tag name. querySelectorAll can use any selector which gives it much more flexibility and power.

What is the difference between GetElementByID and getElementsByTagName?

Can GetElementsByTagName return null?

What is the difference between GetElementByID and GetElementsByTagName?

What is NodeList in Java?

The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live. The items in the NodeList are accessible via an integral index, starting from 0.

How does the getelements bytagname ( ) method work?

The getElementsByTagName() method returns a collection of all elements in the document with the specified tag name, as a NodeList object. The NodeList object represents a collection of nodes. The nodes can be accessed by index numbers. The index starts at 0. Tip: The parametervalue “*” returns all elements in the document.

How to get the tag name of an element?

Instead, use Element.getElementsByTagNameNS () , which preserves the capitalization of the tag name. Element.getElementsByTagName is similar to Document.getElementsByTagName (), except that it only searches for elements that are descendants of the specified element.

How to find number of elements in HTML collection?

The elements in the returned collection are sorted as they appear in the source code. Find out how many elements there are in the document (using the length property of the HTMLCollection object): document.getElementsByTagName(“P”) [0].innerHTML = “Hello World!”; Using the “*” parameter.