// 移除ref的class
// ref_info 都是获取$refs对象，例如：this.$refs.class1
// 这里的 ref_info 是个数组[this.$refs.class1, this.$refs.class2]
// 是否为组件的情况需要区分的，决定是否需要使用`$el`来获取
refRemoveClass(ref_info, class_name) {
    ref_info.forEach((element) => {
        // 区分是否为组件内，使用需要用 $el
        let class_name_arr = element.$el
            ? element.$el.className.split(" ")
            : element.className.split(" ");
        let index = class_name_arr.findIndex((item) => {
            return item == class_name;
        });
        if (index !== -1) class_name_arr.splice(index, 1);
        // 区分是否为组件内，使用需要用 $el
        if (element.$el) {
            element.$el.className = class_name_arr.join(" ");
        } else {
            element.className = class_name_arr.join(" ");
        }
    });
},
// 添加ref的class
// 添加ref的class
refAddClass(ref_info, class_name) {
    if (this.hasClass(ref_info, class_name)) return;
    // 区分是否为组件内，使用需要用 $el
    let class_name_arr = [];

    if (ref_info.$el) {
        if (ref_info.$el.className === undefined) {
            // 判断是否为空
            class_name_arr = ref_info.$el.className.split(" ");
        } else {
            class_name_arr = ref_info.$el[0].className.split(" ");
        }
    } else {
        if (ref_info.className !== undefined) {
            // 判断是否为空
            class_name_arr = ref_info.className.split(" ");
        } else {
            class_name_arr = ref_info[0].className.split(" ");
        }
    }
    class_name_arr.push(class_name);
    // 区分是否为组件内，使用需要用 $el
    if (ref_info.$el) {
        if (ref_info.$el.className === undefined) {
            ref_info.$el.className = class_name_arr.join(" ");
        } else {
            ref_info.$el[0].className = class_name_arr.join(" ");
        }
    } else {
        if (ref_info.className !== undefined) {
            // 判断是否为空
            ref_info.className = class_name_arr.join(" ");
        } else {
            ref_info[0].className = class_name_arr.join(" ");
        }
    }
},
// 判断ref是否有该class
hasClass(ref_info, class_name) {
    let reg = new RegExp("(^|\\s)" + class_name + "($|\\s)");
    // 区分是否为组件内，使用需要用 $el
    if (ref_info.$el) {
        return reg.test(ref_info.$el.className);
    } else {
        return reg.test(ref_info.className);
    }
},