Practices for conditional rendering in React

Conditional Rendering in React works the same way conditions work in JavaScript, allowing developers to create distinct components that encapsulate the behavior they need. This can be done using JavaScript operators like if or the conditional operator to create elements representing the current state and let React update the UI to match them. There are several useful methods for conditional Rendering in React, such as using the if JavaScript operator to decide which component should be rendered.

This can be achieved using conditional statements, ternary operators, or logical operators. Here are some examples of conditional rendering in React:

1. If/Else statements

   One of the most straightforward ways to conditionally render components in React is to use if/else statements. Here's an example:

    import React from 'react';
   
    function MyComponent(props) {
      if (props.condition) {
        return <p>This component is rendered conditionally!</p>;
      } else {
        return null;
      }
    }
   
    export default MyComponent;
   

   In this example, the MyComponent function uses an if/else statement to conditionally render a paragraph element based on the value of the condition prop.

2. Ternary operator

   Another popular technique for conditional rendering in React is to use a ternary operator. Here's an example:

    import React from 'react';
   
    function MyComponent(props) {
      return (
        <div>
          {props.condition ? (
            <p>This component is rendered conditionally!</p>
          ) : (
            <p>This component is always rendered!</p>
          )}
        </div>
      );
    }
   
    export default MyComponent;
   

   In this example, the MyComponent function uses a ternary operator to conditionally render a paragraph element based on the value of the condition prop. If condition is true, the first paragraph is rendered; otherwise, the second paragraph is rendered.

3. && operator

   The && operator can also be used for conditional rendering in React. Here's an example:

    import React from 'react';
   
    function MyComponent(props) {
      return (
        <div>
          {props.condition && (
            <p>This component is rendered conditionally!</p>
          )}
        </div>
      );
    }
   
    export default MyComponent;
   

   In this example, the MyComponent function uses the && operator to conditionally render a paragraph element based on the value of the condition prop. If condition is true, the paragraph is rendered; otherwise, nothing is rendered.

4. Switch statement

   For more complex conditional rendering, a switch statement can be used. Here's an example:

    import React from 'react';
   
    function MyComponent(props) {
      switch (props.condition) {
        case 'A':
          return <p>Render component A</p>;
        case 'B':
          return <p>Render component B</p>;
        case 'C':
          return <p>Render component C</p>;
        default:
          return <p>Render component D</p>;
      }
    }
   
    export default MyComponent;
   

   In this example, the MyComponent function uses a switch statement to conditionally render different components based on the value of the condition prop.

These are just a few examples of the many techniques for conditional rendering in React. The choice of technique depends on the specific use case and personal preference.