JSFiddle - React, Tailwind, and code Playground

by chen644733521

HTML

<div class="coop-list">
        <div class="topBorder-move" id="J_borTop"></div>
        <div class="leftBorder-move" id="J_borLeft"></div>
        <div> 转啊转啊转啊转</div>
        <div class="rightBorder-move" id="J_borRight"></div>
        <div class="bottomBorder-move" id="J_borBottom"></div>
    </div>

CSS

.coop-list {
            position: relative;
            width: 60%;
            overflow: hidden;
            margin: 20px;
        }

        .topBorder-move {
            position: relative;
            left: -1500px;
            width: 3000px;
            border-top: 2px dashed #DADDE1;
        }

        .bottomBorder-move {
            position: relative;
            left: -1500px;
            width: 4000px;
            border-bottom: 2px dashed #DADDE1;
        }

        .leftBorder-move {
            position: absolute;
            top: -1500px;
            width: 1px;
            height: 4000px;
            border-left: 2px dashed #DADDE1;
        }

        .rightBorder-move {
            position: absolute;
            right: 0;
            top: -1500px;
            width: 1px;
            height: 3000px;
            border-right: 2px dashed #DADDE1;
        }

JavaScript

var getStyleValue = function (ele, attr) {
            var doc = document;
            var style = ele.currentStyle || doc.defaultView.getComputedStyle(ele, null);
            return parseInt(style[attr].replace(/px/g, ""));
        };

        var $G = function (id) {
            return document.getElementById(id);
        };

        (function () {
            var borTop = $G("J_borTop"),
                 borBottom = $G("J_borBottom"),
                 borLeft = $G("J_borLeft"),
                 borRight = $G("J_borRight"),
                 left = getStyleValue(borTop, 'left'),
                 top = getStyleValue(borLeft, 'top');

            setInterval(function () {
                if (left < 0) {
                    left += 2;
                    borRight.style.top = left + "px";
                    borTop.style.left = left + "px";
                } else {
                    left = -1500
                };

                if (top > -3000) {
                    top -= 2;
                    borBottom.style.left = top + "px";
                    borLeft.style.top = top + "px";
                } else {
                    top = -1500
                };
            }, 60);
        })();