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Window matchMedia()

Esempio 1

La larghezza dello schermo/della finestra è maggiore di 700 pixel:

if (window.matchMedia("(max-width: 700px)").matches) {
  // Viewport is less or equal to 700 pixels wide
} else {
  // Viewport is greater than 700 pixels wide
}

Definizione e utilizzo

Il matchMedia()metodo restituisce un MediaQueryList con i risultati della query.

Guarda anche:

L'oggetto MediaQueryList


Query sui media

Le media query del matchMedia()metodo possono essere una qualsiasi delle funzionalità multimediali della regola CSS @media , come min-height, min-width, orientamento, ecc.

Esempi

matchMedia("(max-height: 480px)").matches);
matchMedia("(max-width: 640px)").matches);

Sintassi

window.matchMedia(mediaQuery)

Parametri

Parameter Description
mediaQuery Required.
A string representing a media query.

Valore di ritorno

Tipo Descrizione
Un oggettoUn oggetto MediaQueryList con i risultati della media query.


Esempi spiegati

Il primo esempio in questa pagina esegue una query multimediale e la confronta con lo stato corrente della finestra.

Per eseguire query multimediali reattive ogni volta che lo stato della finestra cambia, aggiungi un listener di eventi all'oggetto MediaQueryList (vedi "Altri esempi" di seguito):


Altri esempi

Se la finestra ha una larghezza inferiore o uguale a 500 pixel, imposta il colore di sfondo su giallo, altrimenti su rosa:

// Create a match function
function myFunction(x) {
  if (x.matches) {
    document.body.style.backgroundColor = "yellow";
  } else {
    document.body.style.backgroundColor = "pink";
  }
}

// // Create a MediaQueryList object
const mmObj = window.matchMedia("(max-width: 700px)")

// Call the match function at run time:
myFunction(mmObj);

// Add the match function as a listener for state changes:
mmObj.addListener(myFunction);

Supporto browser

matchMedia()è supportato in tutti i browser moderni:

Chrome IE Edge Firefox Safari Opera
Yes 11 Yes Yes Yes Yes