Function getNormalizationType

vue.js:15171–15197

(
        children,
        maybeComponent
    )

    // 2:需要完全标准化
    //如果children.length==0 就返回0，如果如果有for属性存在或者tag等于template或者是slot 则问真就返回1，如果是组件则返回2
    function getNormalizationType(
        children,
        maybeComponent
    ) {
        var res = 0;
        for (var i = 0; i < children.length; i++) { //循环子节点
            var el = children[i];
            if (el.type !== 1) { //如果是真是dom则跳过循环
                continue
            }
            //如果有for属性存在或者tag等于template或者是slot 则问真
            if (needsNormalization(el) ||
                (el.ifConditions && el.ifConditions.some(function (c) { //判断数组中是否存在满足条件的项，只要有一项满足条件，就会返回true。
                    return needsNormalization(c.block);
                }))) {
                res = 2;
                break
            }
            if (maybeComponent(el) || //判断是否是组件
                (el.ifConditions && el.ifConditions.some(function (c) {//判断数组中是否存在满足条件的项，只要有一项满足条件，就会返回true。
                    return maybeComponent(c.block);
                }))) {
                res = 1;
            }
        }
        return res
    }

    //如果for属性存在或者tag等于template或者是slot 则问真
    function needsNormalization(el) {