Function simpleNormalizeChildren

vue.js:3291–3298

(children)

    //循环子节点children，把他连在一起，其实就是把伪数组变成真正的数组
    function simpleNormalizeChildren(children) {
        for (var i = 0; i < children.length; i++) {
            if (Array.isArray(children[i])) {
                return Array.prototype.concat.apply([], children)
            }
        }
        return children
    }

    // 2. When the children contains constructs that always generated nested Arrays, 2。当子类包含总是生成嵌套数组的结构时，
    // e.g. <template>, <slot>, v-for, or when the children is provided by user 例如，模板缝隙＞＜＞、＜V时，或当孩子由用户提供