Data Science
What are fragments in React JS
React Fragments
React Fragments is introduced from the 16.2 and above version, to facilitate the grouping off a list of children without adding extra nodes to the DOM.
Syntax:
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Example:
class App extends React.Component {
render() {
return (
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Importance of React Fragments:
- The execution of code is faster with the use of React fragments as compared to the div tag.
- Less memory is utilised with the use of React fragments as compared to the div tag.
Fragments Short Syntax:
For declaring fragments, there is another shorthand exists.
Example:
class Columns extends React.Component {
render() {
return (
<>
WelcomeYou are in the world of ReactJS. ); } } |
Keyed Fragments:
In ReactJS, Key is the only attribute that can be passed with the Fragments, as it is needed for mapping a
collection to an array of fragments.
Example:
Function = (props) {
return (
{props.items.data.map(item => (
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