Is a node list an array?
Note: Although NodeList is not an Array , it is possible to iterate over it with forEach() . It can also be converted to a real Array using Array.
What is the difference between a node list and an array?
The biggest takeaway from the NodeList vs. an array discussion: a NodeList is a collection of nodes that can be used to access and manipulate DOM elements, while an array is a JavaScript object which can hold more than one value at a time. Both NodeLists and arrays have their own prototypes, methods, and properties.
How do I traverse NodeList?
Loop over a nodelist
- Use the ES6 spread operator. [… elements]. forEach(function(ele) { …
- Use the Array methods. // `Array.from` is not supported on IE. Array. from(elements).
- Use the forEach method. If you don’t have to support Internet Explorer, then use the forEach method: elements. forEach(function(ele) {
Is querySelectorAll an array?
The querySelectorAll method returns an array-like object called a node list. These data structures are referred to as “Array-like”, because they appear as an array, but can not be used with array methods like map and forEach .
What is a node list?
A NodeList is a collection of document nodes. A NodeList and an HTML collection is very much the same thing. Both an HTMLCollection object and a NodeList object is an array-like list (collection) of objects. Both have a length property defining the number of items in the list (collection).
Is HTMLCollection an array?
An HTMLCollection object is an array-like list of HTML elements. Methods like the getElementsByTagName() returns an HTMLCollection.
Why is NodeList not an array?
You only use a NodeList when one is returned by the DOM. Why doesn’t the DOM return an Array or at least a type that has Array in its prototype chain? Because the DOM is designed to not depend on anything language specific. All types returned by the DOM API will be host types rather than native types.
Can you map a NodeList?
To filter or map nodelists with JavaScript, we can use the spread operator to convert the nodelist to an array. Then we use the spread operator to spread the items in the nodes nodelist into an array. And then we call map to map the node array to an array of text.
What is the difference between NodeList and HTMLCollection?
What is the difference between a HTMLCollection and a NodeList? A HTMLCollection contains only element nodes (tags) and a NodeList contains all nodes. Whitespace inside elements is considered as text, and text is considered as nodes.
What is the difference between querySelector and getElementsByClassName?
querySelectorAll() retrieves a list of elements from the document based on your given selector, and returns a static NodeList object. getElementsByClassName() retrieves a list of elements from the document based on an element’s class name, and returns a live HTML collection of elements.
What is the difference between querySelector and querySelectorAll?
Differences: As seen above, querySelector() methodcan only be used to access a single element while querySelectorAll() method can be used to access all elements which match with a specified CSS selector. To return all matches, querySelectorAll has to be used, while to return a single match, querySelector is used.
How do I access a node list?
NodeList items can only be accessed by their index number. Only the NodeList object can contain attribute nodes and text nodes. A node list is not an array! A node list may look like an array, but it is not.