In React, you can create distinct components that encapsulate behavior you need. Then, you can render only some of them, depending on the state of your application.
Conditional rendering in React works the same way conditions work in JavaScript. Use JavaScript operators like if or the conditional operator to create elements representing the current state, and let React update the UI to match them.
You can use variables to store elements. This can help you conditionally render a part of the component while the rest of the output doesn’t change.
While declaring a variable and using an if statement is a fine way to conditionally render a component, sometimes you might want to use a shorter syntax. There are a few ways to inline conditions in JSX.
You may embed expressions in JSX by wrapping them in curly braces({}). This includes the JavaScript logical && operator. It can be handy for conditionally including an element.
It works because in JavaScript, true && expression always evaluates to expression, and false && expression always evaluates to false.
Therefore, if the condition is true, the element right after && will appear in the output. If it is false, React will ignore and skip it.
Note that returning a falsy expression will still cause the element after && to be skipped but will return the falsy expression.
Another method for conditionally rendering elements inline is to use the JavaScript conditional operator condition ? true : false.