Example Wiki

Class: MatchMedia

Description: This class provides a polyfill for the window.matchMedia API, which is used to detect media queries and handle media changes. It's specifically designed to address the "matchMedia not present, legacy browsers require a polyfill jest" error in Jest testing environments.

Methods

Method: addListener

Description: This method is a placeholder for the addListener function of the window.matchMedia API. It does nothing in this polyfill implementation.

Parameters:

• None

Returns:

• void

Example:

const mediaQuery = window.matchMedia('(min-width: 768px)'); 
mediaQuery.addListener(() => { 
  // This callback won't be executed in this polyfill.
});

Method: removeListener

Description: This method is a placeholder for the removeListener function of the window.matchMedia API. It does nothing in this polyfill implementation.

Parameters:

• None

Returns:

• void

Example:

const mediaQuery = window.matchMedia('(min-width: 768px)'); 
const listener = () => {
  // This callback won't be executed in this polyfill.
};
mediaQuery.addListener(listener); 
mediaQuery.removeListener(listener); 

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