Table of Contents
What is createContextualFragment?
createContextualFragment() method returns a DocumentFragment by invoking the HTML fragment parsing algorithm or the XML fragment parsing algorithm with the start of the range (the parent of the selected node) as the context node.
What is fragmentation in JS?
A common pattern in React is for a component to return multiple elements. Fragments let you group a list of children without adding extra nodes to the DOM.
What is the purpose of the method createDocumentFragment?
The createDocumentFragment() method creates an offscreen node. The offscreen node can be used to build a new document fragment that can be insert into any document.
What is fragment HTML?
For HTML, the fragment ID is an SGML ID of an element within the HTML object. For XML, if it is just a word, then it is the XML ID of an element in the document.
How do you use a document fragment?
A common use for DocumentFragment is to create one, assemble a DOM subtree within it, then append or insert the fragment into the DOM using Node interface methods such as appendChild() or insertBefore() . Doing this moves the fragment’s nodes into the DOM, leaving behind an empty DocumentFragment .
When should I use react fragment?
React Fragments allow you to wrap or group multiple elements without adding an extra node to the DOM. This can be useful when rendering multiple child elements/components in a single parent component.
How do I create a DocumentFragment?
First, select the
- element by its id using the querySelector() method. Second, create a new document fragment. Third, for each element in the languages array, create a list item element, assign the list item’s innerHTML to the language , and append all the newly created list items to the document fragment.
What is the difference between append and appendChild?
append() can append several nodes and strings, whereas Node. appendChild() can only append one node.
What is a React portal?
React portals provide a first-class way to render and allow child components, which are typically present outside the DOM, to live within a Document Object Model (DOM) node. This React portal component exists outside the DOM hierarchy of the parent component.
What is DOM fragment?
A document fragment is a fragment of a Document Object Model (DOM) tree, a chunk of tree that’s separated from the rest of the DOM. Before going further, let’s talk about browser reflow and how it affects performance.