vue_computed用法

function CLASS_VUE() {
    this.start=function (selector,dataObject) {
        var gb={el: selector, data: dataObject};
        return new Vue(gb);
    };
    this.startMethod=function (selector, dataObject, methodObject) {
        var gb={el: selector, data: dataObject,methods:methodObject};
        return new Vue(gb);
    };
    this.startComputed=function (selector,dataObject,computedObject) {
        var gb={el: selector, data: dataObject,computed:computedObject};
        return new Vue(gb);
    };
}

<div id="computed">
    sum={{sum}}
</div>
<script>
var vuee=new CLASS_VUE();
var sumObject={sum:function () {
    return this.a+1;
}};
vuee.startComputed(‘#computed‘,{a:1},sumObject)
</script>