ola-toolkit/lib/components/bind/index.js

ola 开发工具套件

'use strict';

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

var _defineProperty = require('babel-runtime/core-js/object/define-property');

var _defineProperty2 = _interopRequireDefault(_defineProperty);

exports.default = function (target, key, descriptor) {
  var fn = descriptor.value;

  var definingProperty = false;

  return {
    configurable: true,
    get: function get() {
      if (definingProperty || this === target.prototype || this.hasOwnProperty(key) || typeof fn !== 'function') {
        return fn;
      }

      var boundFn = fn.bind(this);
      definingProperty = true;
      (0, _defineProperty2.default)(this, key, {
        configurable: true,
        get: function get() {
          return boundFn;
        },
        set: function set(value) {
          fn = value;
          delete this[key];
        }
      });
      definingProperty = false;
      return boundFn;
    },
    set: function set(value) {
      fn = value;
    }
  };
};

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

module.exports = exports['default']; /**
                                      * @Decorator
                                      * 绑定方法上下文到实例
                                      * @param target
                                      * @param key
                                      * @param descriptor
                                      * @returns {*}
                                      */