vue实现滑块滑动校验

为了防止机器操作自动提交，我们需要添加滑动校验。

实现代码如下：

 

1.子组件slider.vue

<template>
    <div class="drag" ref="dragDiv">
        <div class="drag_bg"></div>
        <div class="drag_text">{{confirmWords}}</div>
        <div ref="moveDiv" @mousedown="mouseDownFn($event)" :class="{'handler_ok_bg':confirmSuccess}" class="handler handler_bg" style="position: absolute;top: 0px;left: 0px;"></div>
    </div>
</template>

<script>
    export default {
        data(){
            return {
                beginClientX: 0,           /*距离屏幕左端距离*/
                mouseMoveState: false,     /*触发拖动状态  判断*/
                maxWidth: '',               /*拖动最大宽度，依据滑块宽度算出来的*/
                confirmWords: '向右拖动滑块验证',   /*滑块文字*/
                confirmSuccess: false           /*验证成功判断*/
            }
        },
        methods: {
            //mousedown 事件
            mouseDownFn:function (e) {
                if(!this.confirmSuccess){
                    e.preventDefault && e.preventDefault();   //阻止文字选中等 浏览器默认事件
                    this.mouseMoveState = true;
                    this.beginClientX = e.clientX;
                }
            },
            //验证成功函数
            successFunction(){
                this.confirmSuccess = true;
                this.confirmWords = '验证通过';
                if(window.addEventListener){
                    document.getElementsByTagName('html')[0].removeEventListener('mousemove',this.mouseMoveFn);
                    document.getElementsByTagName('html')[0].removeEventListener('mouseup',this.moseUpFn);
                }else {
                    document.getElementsByTagName('html')[0].removeEventListener('mouseup',()=>{});
                }
                document.getElementsByClassName('drag_text')[0].style.color = '#fff';
                document.getElementsByClassName('handler')[0].style.left = this.maxWidth + 'px';
                document.getElementsByClassName('drag_bg')[0].style.width = this.maxWidth + 'px';
            },
            //mousemove事件
            mouseMoveFn(e){
                if(this.mouseMoveState){
                    let width = e.clientX - this.beginClientX;
                    if(width>0 && width<=this.maxWidth){
                        document.getElementsByClassName('handler')[0].style.left = width + 'px';
                        document.getElementsByClassName('drag_bg')[0].style.width = width + 'px';
                    }else if(width>this.maxWidth){
                        this.successFunction();
                    }
                }
            },
            //mouseup事件
            moseUpFn(e){
                this.mouseMoveState = false;
                var width = e.clientX - this.beginClientX;
                if(width<this.maxWidth){
                    document.getElementsByClassName('handler')[0].style.left = 0 + 'px';
                    document.getElementsByClassName('drag_bg')[0].style.width = 0 + 'px';
                }
            }
        },
        mounted(){
            this.maxWidth = this.$refs.dragDiv.clientWidth - this.$refs.moveDiv.clientWidth;
            document.getElementsByTagName('html')[0].addEventListener('mousemove',this.mouseMoveFn);
            document.getElementsByTagName('html')[0].addEventListener('mouseup',this.moseUpFn)
        }
    }
</script>
<style scoped>
    .drag{
        position: relative;
        background-color: #e8e8e8;
        width: 100%;
        height: 40px;
        line-height: 40px;
        text-align: center;
        border: 1px solid #ccc;
        border-radius: 4px;
    }
    .handler{
        width: 40px;
        height: 38px;
        border: 1px solid #ccc;
        border-radius: 4px;
        cursor: move;
    }
    .handler_bg{
        background: #fff url("data:image/png;base64,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") no-repeat center;
    }
    .handler_ok_bg{
        border-top-left-radius: 0;
        border-bottom-left-radius: 0;
        background: #fff url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA3hpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDIxIDc5LjE1NTc3MiwgMjAxNC8wMS8xMy0xOTo0NDowMCAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDo0ZDhlNWY5My05NmI0LTRlNWQtOGFjYi03ZTY4OGYyMTU2ZTYiIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6NDlBRDI3NjVGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6NDlBRDI3NjRGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIDIwMTQgKE1hY2ludG9zaCkiPiA8eG1wTU06RGVyaXZlZEZyb20gc3RSZWY6aW5zdGFuY2VJRD0ieG1wLmlpZDphNWEzMWNhMC1hYmViLTQxNWEtYTEwZS04Y2U5NzRlN2Q4YTEiIHN0UmVmOmRvY3VtZW50SUQ9InhtcC5kaWQ6NGQ4ZTVmOTMtOTZiNC00ZTVkLThhY2ItN2U2ODhmMjE1NmU2Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+k+sHwwAAASZJREFUeNpi/P//PwMyKD8uZw+kUoDYEYgloMIvgHg/EM/ptHx0EFk9I8wAoEZ+IDUPiIMY8IN1QJwENOgj3ACo5gNAbMBAHLgAxA4gQ5igAnNJ0MwAVTsX7IKyY7L2UNuJAf+AmAmJ78AEDTBiwGYg5gbifCSxFCZoaBMCy4A4GOjnH0D6DpK4IxNSVIHAfSDOAeLraJrjgJp/AwPbHMhejiQnwYRmUzNQ4VQgDQqXK0ia/0I17wJiPmQNTNBEAgMlQIWiQA2vgWw7QppBekGxsAjIiEUSBNnsBDWEAY9mEFgMMgBk00E0iZtA7AHEctDQ58MRuA6wlLgGFMoMpIG1QFeGwAIxGZo8GUhIysmwQGSAZgwHaEZhICIzOaBkJkqyM0CAAQDGx279Jf50AAAAAABJRU5ErkJggg==") no-repeat center;
    }
    .drag_bg{
        background-color: #7ac23c;
        height: 38px;
        width: 0px;
        border-radius: 4px 0 0 4px;
    }
    .drag_text{
        position: absolute;
        top: 0px;
        width: 100%;text-align: center;
        -moz-user-select: none;
        -webkit-user-select: none;
        user-select: none;
        -o-user-select:none;
        -ms-user-select:none;
    }
</style>

2.调用组件：（使用了ElementUI）

<template>
    <el-form class="form-wrapper" ref="myForm" :model="myForm" label-width="110px">
        <el-form-item label="滑块验证：">
            <div><slider ref="slider"></slider></div>
        </el-form-item>
        <el-form-item>
            <el-button type="primary" @click="toSubmit">提交</el-button>
        </el-form-item>
    </el-form>
</template>
<script type="text/ecmascript-6">
    import slider from './slider'
    export default {
        data() {
            return {
                myForm: {}
            }
        },
        components: {
            slider
        },
        methods: {
            toSubmit() {
                if(this.$refs['slider']) {
                    // 未通过验证时，提示错误信息并返回
                    if (!this.$refs['slider'].confirmSuccess) {
                        this.$message.error("请拖动滑块验证");
                        return
                    }
                }
                // 通过验证后提交
                // TO DO ...
                this.$message.success("验证成功，可提交");
            },
        }
    }
</script>
<style type="text/css" scoped>
    .form-wrapper {
        margin-top: 50px;
        width: 500px;
    }
</style>

3.效果图：