bind context to fix error

[Jbcampbe]

Fix error that was missed in #171

[dgavey]

Thanks, I'll do a release later tonight

[boris-petrov]

@Jbcampbe, @dgavey - I don't believe this works as intended. this.handleMouseEnter.bind(this) returns a new function every time it is called. So the call to removeEventListener won't remove the added listener because the function is different. The result from the binding in addEventListener should be saved as an instance variable or, better yet, this change to be reverted to be just this.handleMouseEnter and the handleMouseEnter to be marked as action from '@ember/object':

import { action } from '@ember/object';

...
  handleMouseEnter: action(function (e) {
    let mouseEnter = this.get('onMouseEnter');
    if (mouseEnter) {
      mouseEnter(e);
    }
  }),

[Jbcampbe]

@Jbcampbe, @dgavey - I don't believe this works as intended. this.handleMouseEnter.bind(this) returns a new function every time it is called. So the call to removeEventListener won't remove the added listener because the function is different. The result from the binding in addEventListener should be saved as an instance variable or, better yet, this change to be reverted to be just this.handleMouseEnter and the handleMouseEnter to be marked as action from '@ember/object':

import { action } from '@ember/object';

...
  handleMouseEnter: action(function (e) {
    let mouseEnter = this.get('onMouseEnter');
    if (mouseEnter) {
      mouseEnter(e);
    }
  }),

Thanks for pointing out! I can get that fix in a PR