Function Data

2.0.3/Data.js:18–30

()

        rmultiDash = /([A-Z])/g;

    function Data() {
        // Support: Android < 4,
        // Old WebKit does not have Object.preventExtensions/freeze method,
        // return new empty object instead with no [[set]] accessor
        Object.defineProperty(this.cache = {}, 0, {
            get: function() {
                return {};
            }
        });

        //dom与data映射的uuid
        this.expando = jQuery.expando + Math.random();
    }

    //每次自增变量
    Data.uid = 1;