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Object.defineProperty Sham For IE  

A Object.defineProperty sham based on VBScript for IE. It also provides Object.defineProperties, Object.getOwnPropertyDescriptor, Object.getOwnPropertyDescriptors.

Notice

1. In IE8, program will use native method defineProperty or getOwnPropertyDescriptor for Element object, doucment and window
2. In other case, defineProperty will return a new VB object
3. For VB object, it will not create new VB object when modifying the existing descriptor
4. VB object can't add or delete properties freely
5. VB object doesn't have [[Prototype]] or __proto__
6. The property name of VB object can't contain special character ]
7. The properties of VB object are enumerable, it's unaffected by descriptor enumerable

Installation

1. Use NPM: npm install -S object-defineproperty-ie
2. Download directly: Development Version, Production Version

Usage

<script src="path/to/object-defineproperty-ie.js" type="text/javascript"></script>
<script type="text/javascript">
    var temp;
    var obj = Object.defineProperties({}, {
        prop1: {
            enumerable: true,
            get: function () {
                return temp;
            },
            set: function (value) {
                temp = value;
            }
        },
        prop2: {
            enumerable: true,
            configurable: true,
            value: 'Hello World'
        },
    });
    obj.prop = 123;
    // obj => {
    //     prop1: 123,
    //     prop2: 'Hello World'
    // }

    Object.defineProperty(obj, 'prop2', {
        value: 'Ambit-Tsai'
    });
    // obj => {
    //     prop1: 123,
    //     prop2: 'Ambit-Tsai'
    // }

    var desc = Object.getOwnPropertyDescriptor(obj, 'prop2');
    // desc => {
    //     enumerable: true,
    //     configurable: true,
    //     writable: false,
    //     value: "Ambit-Tsai"
    // }
</script>

Testing

1. Access GitHub Page online
2. Access docs/index.html locally
3. Tested in IE6, IE7, IE8

Contact Us

1. WeChat: ambit_tsai
2. QQ Group: 663286147
3. E-mail: [email protected]

Reference

1. 迷你MVVM框架avalon在兼容旧式IE做的努力