js

监听多个事件

// 可同时监听多个事件
// 返回事件的执行方法，用于移除监听事件
 
export function addEvent(obj, type, fn) {
  if (obj.attachEvent) { // ie
    obj.attachEvent(`on${type}`, () => {
      fn.call(obj);
    })
  } else {
    obj.addEventListener(type, fn, false);
  }
  return fn;
}
 
// call
const scrollFn = addEvent(window, 'scroll', () => {
    // do something
});
 
// remove event
window.removeEventListener('scroll', scrollFn, false);