最基本點(diǎn)運(yùn)算

let person = { ?name: 'henry', ?age: 18, ?run: function() { ? ?console.log('running'); ?} } person.run();


屬性的讀?。?br>let person = { ?name: 'henry', ?age: 18 }console.log(person.name);console.log(person['name']);
//二者輸出均為henry

其中方括號里的值可以是個(gè)變量：
let person = { ?name: 'henry', ?age: 18 }let variable = 'name';console.log(person[variable]); variable = 'age';console.log(person[variable]);



讀取對象中的對象屬性--點(diǎn)運(yùn)算：
let person = { ?name: 'henry', ?age: 18, ?parents: { ? ?papa: 'jack', ? ?mama: 'mary' ?} }console.log(person.parents.papa);console.log(person['parents']['mama']);
//輸出jack
　　　mary



屬性的賦值和讀取：let person = { ?name: 'henry', ?age: 18 } person.name = 'tom'; person['age'] = 10console.log(person.name);console.log(person.age);
//輸出tom
　　　10



屬性的查看（使用Object.keys方法）let person = { ?name: 'henry', ?age: 18 }console.log(Object.keys(person))；
//輸出一個(gè)數(shù)組['name','age']

屬性的刪除（delete）：
let person = { ?name: 'henry', ?age: 18 }delete person.name;console.log(person);
增加：
let person = { ?name: 'henry', ?age: 18 } person.gender = 'male'

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