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Tabs react Code Snippet in 2024

componentsstatechildrenintermediate

Last Updated: 16 June 2024

Renders a tabbed menu and view component.

  • Define a Tabs component. Use the useState() hook to initialize the value of the bindIndex state variable to defaultIndex.
  • Define a TabItem component and filter children passed to the Tabs component to remove unnecessary nodes except for TabItem by identifying the function's name.
  • Define changeTab, which will be executed when clicking a <button> from the menu.
  • changeTab executes the passed callback, onTabClick, and updates bindIndex based on the clicked element.
  • Use Array.prototype.map() on the collected nodes to render the menu and view of the tabs.
  • Use the value of bindIndex to determine the active tab and apply the correct className.
.tab-menu > button { cursor: pointer; padding: 8px 16px; border: 0; border-bottom: 2px solid transparent; background: none; } .tab-menu > button.focus { border-bottom: 2px solid #007bef; } .tab-menu > button:hover { border-bottom: 2px solid #007bef; } .tab-content { display: none; } .tab-content.selected { display: block; }
const TabItem = props => <div {...props} />; const Tabs = ({ defaultIndex = 0, onTabClick, children }) => { const [bindIndex, setBindIndex] = React.useState(defaultIndex); const changeTab = newIndex => { if (typeof onTabClick === 'function') onTabClick(newIndex); setBindIndex(newIndex); }; const items = children.filter(item => item.type.name === 'TabItem'); return ( <div className="wrapper"> <div className="tab-menu"> {items.map(({ props: { index, label } }) => ( <button key={`tab-btn-${index}`} onClick={() => changeTab(index)} className={bindIndex === index ? 'focus' : ''} > {label} </button> ))} </div> <div className="tab-view"> {items.map(({ props }) => ( <div {...props} className={`tab-content ${ bindIndex === props.index ? 'selected' : '' }`} key={`tab-content-${props.index}`} /> ))} </div> </div> ); };
ReactDOM.render( <Tabs defaultIndex="1" onTabClick={console.log}> <TabItem label="A" index="1"> Lorem ipsum </TabItem> <TabItem label="B" index="2"> Dolor sit amet </TabItem> </Tabs>, document.getElementById('root') );

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