Comments (1)
不能删除不可删除的属性,否则报错
"use strict";
delete Object.prototype; // 报错
Uncaught TypeError: Cannot delete property 'prototype' of function Object() { [native code] }
不能删除变量 delete prop,会报错,只能删除属性 delete global[prop]
eval 不会在它的外层作用域引入变量 && eval 和 arguments 不能被重新赋值
由于eval()函数过于强大,严格模式对其进行了严格的限制
不能通过eval()函数来创建变量或函数,但可以查询和更改其值
arguments 不会自动反映函数参数的变化
不能使用 arguments.callee
当一个函数必须调用自身的时候, 避免使用 arguments.callee(), 通过要么给函数表达式一个名字,要么使用一个函数声明.
不能使用 arguments.caller
本属性已被移除且不再有用。
禁止 this 指向全局对象
字面意思。
不能使用 fn.caller 和 fn.arguments 获取函数调用的堆栈
fn.caller 非标准,fn.arguments已弃用
增加了保留字(比如 protected、static 和 interface)
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