小程序里面不能使用delete操作符，提示：
unknown: Deleting local variable in strict mode
但是我查了一下，严格模式下，对于configuration为true（通过Object.create或者Object.defineProperty定义）的属性 是可以delete的，
var o = Object.create(null, {'x': {
value: 1,
configurable: true
}});所以这块儿希望改进一下
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delete操作符是允许的，请提供一下代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）？
应该是我用法错了，发现是这样的:
var foo = {bar: {}};
delete foo.bar // 没问题
var other = foo.bar
delete other // 会报上面的错