@ohu-mobile/core/lib-rem/_utils/bindEvent.js

Mobile UI Toolkit

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;
function _default(instance, event, handler) {
  var registered = false;
  var listener = function listener() {
    handler();
  };
  var register = function register() {
    window.addEventListener(event, listener);
    registered = true;
  };
  var unregister = function unregister() {
    window.removeEventListener(event, listener);
    registered = false;
  };
  register();
  instance.$once('hook:beforeDestroy', unregister);
  instance.$once('hook:activated', function () {
    if (registered) return;
    register();
  });
  instance.$once('hook:deactivated', unregister);
}