How to use drag replacement in Vue to achieve certain interactive purposes

Vue is a popular JavaScript framework that uses reactive programming to manage the DOM and provides a concise and powerful way to build interactive web applications. One of the great features of Vue is drag and drop functionality. This article will introduce how to use drag replacement in Vue to achieve certain interactive purposes.

Drag-and-drop is one of the key features that makes web applications more intuitive and easier to use. In many applications, users can drag data elements, such as images, text, or other types of information, and place them in another location within the application. This interactive style improves the ease of use of the application by allowing users to easily organize and manipulate information.

In Vue, many useful interactive operations can be achieved using drag-and-drop functionality. For example, you can let the user drag an element with a picture or text and drop it into a new location to change its position or ordering. Drag events include: drag start, drag end, drag process, etc.

In some scenarios, drag replacement can be used to help users quickly and intuitively operate components such as pictures or lists. In Vue, the drag-and-drop replacement function can be easily implemented using a library called dragula, which can handle the dragging and reordering of DOM elements.

Next, let us start with a simple example to demonstrate how to use the dragula library to implement the drag replacement function.

Prerequisite knowledge:

• Installation and reference of dragula library
• Implementation method of Vue component development

Example:

We are going to use Vue and the dragula library to create a list-based drag and replace function to demonstrate this process.

1. Install dragula library

npm install dragula

2. Introduce dragula library

import dragula from ‘dragula’；

3. Use dragula library

dragula([document.querySelector(‘#list1’), document.querySelector(‘#list2’)])
.on(‘dragend’, function(el){ });

4. Create Vue component

Vue.component(‘drag-and-drop’, {
    data() {
        return {
            items: [
                { name: ‘item1’ },
                { name: ‘item2’ },
                { name: ‘item3’ },
                { name: ‘item4’ },
                { name: ‘item5’ },
            ]
        }
    },
    mounted() {
        let self = this;
        let container = this.$refs.container;
        dragula([container])
            .on(‘drop’, function(el, target, source, sibling){  //拖拽成功后的逻辑
                let oldIndex = el.getAttribute(‘data-index’); // 获取拖住的元素的原来的index
                let newIndex = sibling ? sibling.getAttribute(‘data-index’) : oldIndex;  // 获取放置的位置或元素
                self.moveItem(+oldIndex, +newIndex);   // 将元素移动位置
            });
    },
    methods: {
        moveItem(oldIndex, newIndex) { //移动元素实例方法
            if (newIndex >= this.items.length) {
                let k = newIndex - this.items.length;
                while ((k--) + 1) {
                    this.items.push(undefined);
                }
            }
            this.items.splice(newIndex, 0, this.items.splice(oldIndex, 1)[0]);
        }
    }
});

5. Create HTML template

<div id="app">
    <div class="list" ref="container">
        <div v-for="(item, index) in items" :key="index" :data-index="index">{{ item.name }}</div>
    </div>
</div>

Now, we can use the Vue component we created to demonstrate dragging The effect of dynamic replacement is achieved.

Conclusion:

In this article, we learned how to use Vue and dragula libraries to implement drag-and-drop replacement. We created a list-based component that allows users to intuitively move items in a list. Of course, our solution may not be the only one, but we hope our approach can give you some ideas by simply demonstrating the core of drag replacement.

If you wish to use the Vue and dragula libraries to implement drag replacement, we encourage you to further explore their features. With a deep understanding of Vue, you can use the framework's excellent features to build efficient, interactive web applications.

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