Javascript：如何不断监视变量值 [英] Javascript: How do constantly monitor variables value

问题描述

如何不断检查变量值。例如：

How do I constantly check a variables value. For example:

if(variable == 'value'){
    dosomething();
}

如果我经常使用它或其他东西，这会有效，但有效吗一旦变量设置为该值就触发的方式？

This would work if I constantly looped it or something, but is there an efficient way of triggering that as soon as the variable is set to that value?

推荐答案

Object.watch ：

监视为属性赋值并在发生时运行函数。

Watches for a property to be assigned a value and runs a function when that occurs.

适用于所有浏览器的

Object.watch（）？讨论跨浏览器在本地不支持它的浏览器上执行 Object.watch 的方法。

Object.watch() for all browsers? talks about cross-browser ways to do Object.watch on browsers that don't support it natively.

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