new而不是Object.create

Question

Normally I'm doing it that way:

$.fn.MYPL = function (options) {
   return this.each(function () {
      myplg = Object.create(MYPL);
      myplg.init(options, this);
   });
};

Object.create is not supported in IE6, IE7, and IE8. I just realized, that I can replace Object.create with new like:

var g = new Graph();

But I have no idea.. How to change my plugin definition?

I've tried:

var myplg = new MYPL();

But it's not working. Any help appreciated.

Answer 1

您可以填充工具Object.create ，这样就可以在IE7和IE8使用它。

Answer 2

I saw the MDN polyfill did not support anything with a properties object, so I wrote a slightly more complete implementation which will at least let you set value and warn about others if there is a console available and also throws the right kind of error messages.

if (!Object.create) {
    Object.create = (function () {
        function _Object() {}

        return function(proto, props) {
            var o, k, d;
            if (proto !== null && typeof proto !== 'object')
                throw new TypeError('Object prototype may only be an Object or null');
            _Object.prototype = proto;
            o = new _Object();
            for (k in props) {
                if (typeof props[k] !== 'object')
                    throw new TypeError('Property description must be an object: ' + props[k]);
                for (d in props[k])
                    if (d === 'value')
                        o[k] = props[k].value;
                    else
                        if (console && console.warn)
                            console.warn('Object.create implementation does not support: ' + d);
            }
            return o;
        };
    }());
}

Answer 3

Object.create(MYPL) sets object prototype. For constructor-based approach you can try the following code:

function MYPLConstructor() {}

for (var key in MYPL) {
     MYPLConstructor.prototype[key] = MYPL[key];
}

var myplg = new MYPLConstructor();