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47 lines
1.2 KiB
47 lines
1.2 KiB
<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<meta charset="UTF-8"> |
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<title>回顾Object.defineProperty方法</title> |
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<script type="text/javascript" src="../vue.js"></script> |
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</head> |
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<body> |
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<div id="root"> |
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</div> |
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<script type="text/javascript"> |
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Vue.config.productionTip = false |
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let number = 18 |
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let person = { |
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name: 'Roger', |
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sex: 'male', |
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// age: '18' |
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} |
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Object.defineProperty(person, 'age', { |
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// value: '18', |
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// enumerable: true, // 控制是否可迭代遍历 |
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// writable: true, // 控制是否可以修改 |
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// configurable: true //控制是否可以删除 |
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// get: function () 用于当调用的时候再获取值，可以简写为 get() {} |
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get: function () { |
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console.log('获取age') |
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return number |
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}, |
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// set function() 用于修改数据是调用 可以简写 set() |
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set(value) { |
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console.log('新的值为', value) |
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number = value |
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} |
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}) |
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console.log(Object.keys(person)) |
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console.log(Object.keys(person).length) |
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for (let key in person) { |
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console.log(key) |
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console.log('@', person[key]) |
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} |
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console.log(person) |
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</script> |
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</body> |
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</html> |