vimo-dt/lib/util/register-listener.js

A Vue2.x UI Project For Mobile & HyBrid

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = registerListener;

function isPassive() {
  var supportsPassiveOption = false;
  try {
    window.addEventListener('test', null, Object.defineProperty({}, 'passive', {
      get: function get() {
        supportsPassiveOption = true;
      }
    }));
  } catch (e) {}
  return supportsPassiveOption;
}

function registerListener(ele, eventName, callback) {
  var opts = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  var unregisterListenersCollection = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : [];

  var listenerOpts = isPassive() ? {
    capture: !!opts.capture,
    passive: !!opts.passive
  } : !!opts.capture;

  ele['addEventListener'](eventName, callback, listenerOpts);

  var unReg = function unregisterListener() {
    ele['removeEventListener'](eventName, callback, listenerOpts);
  };

  if (unregisterListenersCollection && Array.isArray(unregisterListenersCollection)) {
    unregisterListenersCollection.push(unReg);
  }

  return unReg;
}