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Méthode d'obtention des propriétés de l'objet JS (.Et [] méthodes)
2022-07-06 07:21:00 【éléphants et fourmis】
jsIl y a deux façons pour les objets d'obtenir des propriétés:1.Adoption.De la façon dont 2. Adoption[]Comment
// Adoption.Comment obtenir la valeur de l'attribut,keyC'est statique
var aa = {
name: "zhang", age: 18};
console.log(aa.name);
// Adoption[]Obtenir la valeur de l'attribut, keyEst dynamique,Ça peut être une chaîne,Ou sous forme numérique
var bb = {
"apple": 3, "pear": 2}
var cc = {
1: "number1", 2: "number2"}
console.log(bb["apple"]);
console.log(cc[1]); // Notez que l'écriture ici est facilement confondue avec le tableau,ccToujours objet,Pas un tableau
// Obtenir tous les objetskeyMéthode
console.log(Object.keys(bb)); // Produits[ 'apple', 'pear' ]
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