js map keys
时间: 2023-11-18 12:53:10 浏览: 40
在JavaScript中的Map对象中,可以使用`keys()`方法来获取所有的键值。通过使用`for...of`循环以及`map.keys()`方法,可以遍历并输出Map对象中的所有键值。下面是一个使用示例:
```javascript
let map = new Map([
['F', 'no'],
['T', 'yes'],
]);
for (let key of map.keys()) {
console.log(key);
}
```
输出结果为:
```
F
T
```
在上述示例中,`map.keys()`方法返回一个可迭代对象,通过`for...of`循环遍历该对象,即可获取Map对象中的所有键值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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