This example renders a different greeting depending on the value of isLoggedIn prop. JSX is a powerful extension to JavaScript that allows us to define UI components. When a component has conditional rendering, the instance of the rendered component can have different looks.
Be it a user interaction, the . You can use the traditional if statement or the switch statement.
Sometimes, you want to render a UI component only if a certain condition is true. To do this, you will use the conditional statements. Our requirement is to display helloMessage if this. In other words: How to use an “ if ” in JSX? If you prefer to use a class name, by all means use a class name.
You may also find the classnames package helpful. Más resultados de stackoverflow. ReactJS 7 respuestas feb.
En caché Traducir esta página sept. Rendering elements based on certain conditions is a common task we need to accomplish when building react screens. For simple conditional rendering, we take advantage of the short-circuit evaluation of.
Dealing with CSS classes and the proper markup of your component (or classNames from now on) can be sometimes frustrating, especially if.