https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/add
DOMTokenList: add() method - Web APIs | MDN
The add() method of the DOMTokenList interface adds the given tokens to the list, omitting any that are already present.
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https://developer.mozilla.org/fr/docs/Web/API/DOMTokenList/add
DOMTokenList.add() - Les API Web | MDN
La méthode add() de l'interface DOMTokenList ajoute le token (marque) à la liste.
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https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/length
DOMTokenList: length property - Web APIs | MDN
The read-only length property of the DOMTokenList interface is an integer representing the number of objects stored in the object.
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https://www.w3schools.com:443/jsref/met_domtokenlist_contains.asp
HTML DOMTokenList contains() Method
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https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/value
DOMTokenList: value property - Web APIs | MDN
The value property of the DOMTokenList interface is a stringifier that returns the value of the list serialized as a string, or clears and sets the list to the...
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https://developer.mozilla.org/fr/docs/Web/API/DOMTokenList/contains
DOMTokenList.contains() - Les API Web | MDN
La méthode contains() de l'interface DOMTokenList renvoie un Boolean (booléen) — true (vrai) si la liste sous-jacente contient le symbole donné, sinon false...
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https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/item
DOMTokenList: item() method - Web APIs | MDN
The item() method of the DOMTokenList interface returns an item in the list, determined by its position in the list, its index.
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https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/contains
DOMTokenList: contains() method - Web APIs | MDN
The contains() method of the DOMTokenList interface returns a boolean value — true if the underlying list contains the given token, otherwise false.
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https://www.w3schools.com:443/jsref/met_domtokenlist_keys.asp
HTML DOMTokenList keys() Method
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