getElementById('root')); root.render(<Garage cars={cars} />); Run Example » Ternary OperatorAnother way to conditionally render elements is by using a ternary operator.condition ? true : false We will go back to the goal example....
If they are logged in, you show some information about the user like here at The Odin Project dashboard page. Otherwise, they are redirected to the sign-in page (this could be any page). While there are many ways to do so, one of the easiest ways is to conditionally create a config...
you re-render it with new props. However, there are a few cases where you need to imperatively modify a child outside of the typical dataflow. The child to be modified could be an instance of a React component, or it could be a DOM element. For ...
This is expected, because you may // conditionally render the ref-ed element, or you may forget to assign it if (!divRef.current) throw Error("divRef is not assigned"); // Now divRef.current is sure to be HTMLDivElement doSomethingWith(divRef.current); }); // Give the ref to ...
props; return <>{showHideDemo1 && This is Demo1 component}</>; } } export default Demo1; In this example, we have used props from the parent component and will show or hide the div conditionally using the same props. This is another approach to hide or show different elements based ...
You can also read context with use, allowing you to read Context conditionally such as after early returns: import {use} from 'react'; import ThemeContext from './ThemeContext' function Heading({children}) { if (children == null) { return null; } // This would not work with useContext...
Save the code and exit the file. Your browser will refresh and show the updated page with the paragraph element. In addition, when the code is converted the empty tags are stripped out: You’ve now added some basic JSX to your component and learned how all JSX needs to be nested in a...
React allows you to hide and show components conditionally. Whether a component renders or not will depend on the value of the state variable, which can be changed in response to the user’s actions. You can store a state variable of the boolean type. In JSX, you can use a ternary oper...
As you can see, the hovering effect activates even if your mouse is on the element’s border. If you liked this guide, SimpleFrontEnd blog has many similarReact guideswith examples. onHover to Conditionally Style Elements in React Similar to conditional rendering, you canuseonMouseEnterandonMou...
You can use logical&&operator to conditionally render an element. Here an element is rendered only if the condition evaluates to true otherwise it is ignored. If you want to notify a user of the number of notifications they have only when they have one or more notifications, you can use th...