Function genCheckboxModel

vue.js:10158–10247

(
        el, //虚拟dom
        value, //v-model view的属性值
        modifiers
    )

    //为input type="checkbox" 虚拟dom添加 change 函数 ，根据v-model是否是数组，调用change函数，调用 set 去更新 checked选中数据的值
    function genCheckboxModel(
        el, //虚拟dom
        value, //v-model view的属性值
        modifiers
    ) {
        console.log(el)

        var number = modifiers && modifiers.number;
        var valueBinding = getBindingAttr(el, 'value') || 'null'; //获取 表单的 value属性值 如果 view 是 value="1"
        var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
        var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';

        /*
         view 绑定的 v-model="item.selected" 第二个参数为
         *  Array.isArray(item.selected)?_i(item.selected,"index")>-1:(item.selected)
         * */

        console.log("Array.isArray(" + value + ")" +
            "?_i(" + value + "," + valueBinding + ")>-1" +
            (
                trueValueBinding === 'true' ?
                    (":(" + value + ")")
                    : (":_q(" + value + "," + trueValueBinding + ")")
            ))

        //在虚拟dom中添加prop属性
        addProp(el,
            'checked',
            "Array.isArray(" + value + ")" +
            "?_i(" + value + "," + valueBinding + ")>-1" +
            (
                trueValueBinding === 'true' ?
                    (":(" + value + ")")
                    : (":_q(" + value + "," + trueValueBinding + ")")
            )
        );







        console.log("var $$a=" + value + "," +
            '$$el=$event.target,' +
            "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
            'if(Array.isArray($$a)){' +
            "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
            '$$i=_i($$a,$$v);' +
            "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
            "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
            "}else{" + (genAssignmentCode(value, '$$c')) + "}")
        /*
         view 绑定的 v-model="item.selected" 第二个参数为

         var $$a = item.selected,  //属性值  v-model view的属性值  item.selected是否是数组
         $$el = $event.target,  //目标dom 真实dom
         $$c = $$el.checked ? (true) : (false);  //是否有选中