在JavaScript中，this指向是函数调用时动态决定的，这带来了极大的灵活性，也常常引发回调中this丢失、对象方法被拆解后指向错误等令人头疼的问题。为了人为干预这一绑定过程，Function原型上提供了call、apply、bind三个方法。call和apply会立即执行函数并显式指定this，区别在于参数传递方式：call展开 ...

本内容遵循CC 4.0 BY-SA版权协议 刚接触JavaScript函数调用的开发者，经常会困惑于这三个方法的区别。记得我最初在实现一个事件处理器时，发现回调函数中的this莫名其妙变成了window对象，直到同事提醒我用bind绑定上下文才解决问题。这三个方法本质上都是为了 ...

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