使用Ember,mixin检测视图/组件外部的单击

Question

我正在编写一个Mixin来处理用户在视图/组件外部点击的时间.

这是混合:

App.ClickElsewhereMixin = Ember.Mixin.create({

  onClickElsewhere: Ember.K,

  didRender: function() {
    this._super.apply(this, arguments);
    return $(document).on('click', this.get('onClickElsewhere'));
  },

  willDestroyElement: function() {
    this._super.apply(this, arguments);
    $(document).off('click', this.get('onClickElsewhere'));
  },
});

我在我的组件中使用它:

onClickElsewhere: function() {
    this.send('exitEditMode');
},

但是当我运行它时,我得到:

TypeError: this.send is not a function

我怎样才能保持this背景？

---

解:

只是为了让读者更容易,在这里工作的Mixin:

App.ClickElsewhereMixin = Ember.Mixin.create({

  onClickElsewhere: Ember.K,

  setupListener: Ember.on('didRender', function() {
    // Set an event that will be fired when user clicks outside of the component/view
    return $(document).on('click', $.proxy(this.get('onClickElsewhere'), this));
  }),

  removeListener: Ember.on('willDestroyElement', function() {
    // Clean the previously defined event to keep events stack clean
    return $(document).off('click', $.proxy(this.get('onClickElsewhere'), this));
  }),
});

Answer 1

当前答案不会检查点击是否实际位于元素之外 - 单击组件​​也会触发回调.

这是一个更新版本:

export default Ember.Mixin.create({
  onOutsideClick: Ember.K,

  handleOutsideClick: function(event) {
    let $element = this.$();
    let $target = $(event.target);

    if (!$target.closest($element).length) {
      this.onOutsideClick();
    }
  },

  setupOutsideClickListener: Ember.on('didInsertElement', function() {
    let clickHandler = this.get('handleOutsideClick').bind(this);

    return Ember.$(document).on('click', clickHandler);
  }),

  removeOutsideClickListener: Ember.on('willDestroyElement', function() {
    let clickHandler = this.get('handleOutsideClick').bind(this);

    return Ember.$(document).off('click', clickHandler);
  })
});

Answer 2

Greg回答有一个错误,这使得删除clickHandler事件不起作用.这意味着即使您销毁组件,您的clickevent也会触发.

这是正确的版本

import Ember from 'ember';

export default Ember.Mixin.create({
    onOutsideClick: Ember.K,

  handleOutsideClick: function(event) {
    let $element = this.$();
    let $target = $(event.target);

    if (!$target.closest($element).length) {
      this.onOutsideClick();
    }
  },

  setupOutsideClickListener: Ember.on('didInsertElement', function() {

    let clickHandler = this.get('handleOutsideClick').bind(this);

    return Ember.$(document).on('click', clickHandler);
  }),

  removeOutsideClickListener: Ember.on('willDestroyElement', function() {

    let clickHandler = this.get('handleOutsideClick').bind(this);

    return Ember.$(document).off('click', Ember.run.cancel(this, clickHandler));
  })
});