[Vue.js] drag로 요소의 순서 변경하기

Template

 <tr
    v-for="(diary, idx) in f_rec_diary_list"
    :key="idx"
    draggable="true"
    @dragstart="drag_area(idx, 'M')"
    @dragend="drag_end_area"
    @dragover.prevent
    @dragenter="drag_enter_area(idx)"
    @drop="drop_area(idx, f_rec_diary_list)"
>

 

Data

data() {
        return {            
            dragged_area_index: null,
            hover_area_index: null,
            dragged_item_index: null,
            hover_item_index: null,
            dragged_type: null,
        };
},

 

Methods

drag_area(index, type) {
    console.log("drag_area -> index", index, "type", type);
    this.dragged_area_index = index;
    this.dragged_type = type;
},
drag_enter_area(index) {
    this.hover_area_index = index;
},
drag_end_area() {
    this.hover_area_index = null;
},
async drop_area(drop_index, parent) {
    if (this.dragged_type !== "M") {
        return;
    }

    const dragged_item = parent.splice(this.dragged_area_index, 1)[0];
    parent.splice(drop_index, 0, dragged_item);

    console.log('parent', parent);

    // Update seq_no values after reordering
    for (let i = 0; i < parent.length; i++) {
        parent[i].seq_no = i + 1;
    }

    console.log("dragged_item", dragged_item);

    this.dragged_area_index = null;
    this.hover_area_index = null;
    this.dragged_type = null;
},
drag_item(index, type) {
    this.dragged_item_index = index;
    this.dragged_type = type;
},
drag_enter_item(index) {
    this.hover_item_index = index;
},
drag_end_item() {
    this.hover_item_index = null;
},