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Document.queryCommandSupported() - Les API Web | MDN
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Document.queryCommandSupported()
La méthode Document.queryCommandSupported() indique si la commande d'éditeur spécifiée est prise en charge par le navigateur.
Syntaxe
js
isSupported = document.queryCommandSupported(command);
Paramètres
command-
La commande pour laquelle on veut déterminer si elle est prise en charge.
Valeur de retour
Renvoie un Boolean qui est true (vrai) si la commande est prise en charge et false (faux) sinon.
Notes
La commande 'paste' (coller) renvoie false (faux), pas seulement si la fonctionnalité n'est pas disponible, mais également si le script l'appelant a des privilèges insuffisants pour réaliser l'action [1].
Exemple
js
var flg = document.queryCommandSupported("SelectAll");
if (flg) {
// ...Faire quelque chose
}
Spécifications
This feature does not appear to be defined in any specification.Compatibilité des navigateurs
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