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问题修改

阮老师你好,在747行这个例子中,filter 返回的是属性的数组集合,所以,使用for...of 得到的key应该是对应的属性 "prop" 而不是您之后备注的 "baz" 可能是我理解有误,耽误了老师宝贵的时间,还望老师见谅

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Original file line number	Diff line number	Diff line change
`@@ -745,21 +745,21 @@ Object.keys(proxy)`
`745`	`745`	`下面的例子是拦截第一个字符为下划线的属性名。`
`746`	`746`
`747`	`747`	```javascript
`748`		`-var target = {`
	`748`	`+let target = {`
`749`	`749`	`_bar: 'foo',`
`750`	`750`	`_prop: 'bar',`
`751`	`751`	`prop: 'baz'`
`752`	`752`	`};`
`753`	`753`
`754`		`-var handler = {`
	`754`	`+let handler = {`
`755`	`755`	`ownKeys (target) {`
`756`	`756`	`return Reflect.ownKeys(target).filter(key => key[0] !== '_');`
`757`	`757`	`}`
`758`	`758`	`};`
`759`	`759`
`760`		`-var proxy = new Proxy(target, handler);`
	`760`	`+let proxy = new Proxy(target, handler);`
`761`	`761`	`for (let key of Object.keys(proxy)) {`
`762`		`- console.log(key)`
	`762`	`+ console.log(target[key]);`
`763`	`763`	`}`
`764`	`764`	`// "baz"`
`765`	`765`	```

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