js 网格卡片交换动画

news2024/9/23 19:19:01

请添加图片描述

关键技术：animate(keyframes, options)
keyframes 关键帧对象数组，或一个关键帧对象（其属性为可迭代值的数组）
代表动画持续时间的整数（以毫秒为单位），或者一个包含一个或多个时间属性
参考传送门

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    * {
      padding: 0;
      margin: 0;
    }
    .box {
      position: relative;
    }
    .box div {
      position: absolute;
      top: 0;
      left: 0;
      width: 50px;
      height: 50px;
      border: 10px inset grey;
    }
  </style>
  <body>
    <div class="box" onclick="getTag(event)"></div>
  </body>
</html>

<script>
  //  多少个格子
  let btnArr = ["a", "b", "c", "d", "e", "f"];
   // 保存点击的两个元素及位置
  let saveArr = [];
  (function () {
    // 获取box
    const box = document.querySelectorAll(".box")[0];
    // 距离顶部有几个90px
    let topNum = 0;
    let dom = "";
    for (let i = 0; i < btnArr.length; i++) {
      if (i % 2 === 0 && i != 0) {
        ++topNum;
      }

      dom += `<div class="${btnArr[i]}" style="left:${
        i == 0 ? "0px" : i % 2 == 1 ? "90px" : "0px"
      };top:${topNum == 0 ? 0 : topNum * 90}px">${btnArr[i]}</div>`;
    }
    box.innerHTML = dom;
  })();

  function getTag(e) {
    let ele = e.target;

    console.dir(ele, "获取到当前点击的元素");
	// saveArr <2 添加当前元素
    if (saveArr.length < 2) {
      let obj = {
        ele: ele,
        left: ele.offsetLeft,
        top: ele.offsetTop,
      };
      saveArr.push(obj);
    }
    // saveArr=2 交换两者的位置
    if (saveArr.length == 2) {
      saveArr[0].ele.animate(
        [
          { left: saveArr[0].left + "px", top: saveArr[0].top + "px" },
          { left: saveArr[1].left + "px", top: saveArr[1].top + "px" },
        ],
        {
         // 交互时长
          duration: 1000,
          // 是否停留
          fill: "forwards",
          // 动画速度
          easing: "linear",
        }
      );
      saveArr[1].ele.animate(
        [
          { left: saveArr[1].left + "px", top: saveArr[1].top + "px" },
          { left: saveArr[0].left + "px", top: saveArr[0].top + "px" },
        ],
        {
          duration: 1000,
          easing: "linear",
          fill: "forwards",
        }
      );
      // 清空saveArr
      saveArr = [];
    }
  }
</script>