caller - JavaScript 编辑

废弃的 arguments.caller 属性原先用在函数执行的时候调用自身。本属性已被移除且不再有用。

描述

arguments.caller 已经不可使用了，但是你还可以使用 Function.caller。

function whoCalled() {
   if (whoCalled.caller == null)
      console.log('I was called from the global scope.');
   else
      console.log(whoCalled.caller + ' called me!');
}

示例

下例演示了arguments.caller属性的作用.

function whoCalled() {
   if (arguments.caller == null)
      console.log('该函数在全局作用域内被调用.');
   else
      console.log(arguments.caller + '调用了我!');
}

规范

无相关标准。JavaScript 1.1 实现，bug 7224 移除 caller，因为潜在的不安全性。

浏览器支持

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相关链接

• Function