javascript - 访问 parent 的属性(property)

Question

您好，我需要更改 onMouseMove 的 mousemove 属性，但我无法访问 myfunc 对象，因为 this 引用了 el 不是父级!!

function myfunc (el) {
  this.el  = el;
  this.mousemove = false;

  el.onmousemove = function(){
      this.mousemove = true;
  };
}

Answer 1

只需存储对 this 的引用，您可以随意命名它。通常使用 that 或 self:

function myfunc(el) {
  var that;
  that = this;
  this.el = el;
  this.mousemove = false;
  el.mousemove = function () {
    that.mousemove = true;
  };
}