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js implements circular menu selector

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Release： 2020-12-07 17:54:35

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js implements circular menu selector

javascript column shares the specific code for implementing the circular menu selector in js for your reference. The specific content is as follows

js implements circular menu selector

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Code:

<head>
  <style>
    .mask{
      position: absolute;
      width: 502px;
      height: 252px;
      left:300px;
      top:350px;
      background: white;
      z-index: 999;
    }
    .con {
      width: 500px;
      height: 500px;
      overflow: hidden;
      position: absolute;
      border-radius: 100%;
      border: 1px solid black;
      user-select: none;
      cursor: pointer;
      left: 300px;
      top: 100px;
    }
 
    .con>p {
      position: absolute;
      width: 250px;
      height: 250px;
      /* border:1px solid black; */
      top: 0;
      left: 125px;
      text-align: center;
      font-size: 16px;
      transform-origin: bottom center;
    }
 
    .con1 {
      width: 400px;
      height: 400px;
      /* background: yellow; */
 
      overflow: hidden;
      position: absolute;
      border-radius: 100%;
      border: 1px solid black;
      user-select: none;
      cursor: pointer;
      left: 350px;
      top: 150px;
    }
 
    .con1>p {
      position: absolute;
      width: 200px;
      height: 200px;
      /* border:1px solid black; */
      top: 0;
      left: 100px;
      text-align: center;
      font-size: 16px;
      transform-origin: bottom center;
    }
  </style>
  <meta name="viewport"
    content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
</head>
 
<body>
  <p class="mask"></p>
  <p class="con">
  </p>
  <p class="con1">
  </p>
  <script>
    conRender();
    conRender1();
    function conRender() {
      var con = document.querySelector(".con");
      var len = 16;
      var deg = 360 / len;
      for (var i = 0; i < len; i++) {
        var dom = document.createElement("p");
        dom.style.transform = "rotate(-" + i * deg + "deg)";
        dom.innerHTML = "财务管理" + i;
        dom.setAttribute("index", i)
        con.appendChild(dom)
      }
      var mouseDown = false;
      var startX = 0;
      var startY = 0;
      var endX = 0;
      var endY = 0;
      var rotate = 0;
      con.addEventListener("mousedown", function (e) {
        mouseDown = true;
        startX = e.pageX;
        startY = e.pageY;
      }, false);
      con.addEventListener("mousemove", function (e) {
        if (mouseDown) {
          endX = e.pageX;
          endY = e.pageY;
          var distance = Math.sqrt(Math.pow((endX - startX), 2) + Math.pow((endY - startY), 2))
          if (endX - startX < 0 || endY - startY < 0) {
            distance = -distance
          }
          rotate += distance
          con.style.transform = "rotate(" + (rotate / 4) + "deg)";
          startX = e.pageX;
          startY = e.pageY;
          var index = Math.round((rotate / 4) / deg);
          var cons = document.querySelectorAll(".con>p")
          for (var i = 0, len = cons.length; i < len; i++) {
            cons[i].style.color = "black"
          }
          document.querySelector("p[index=\"" + index % len + "\"]").style.color = "red"
          document.querySelector(".con1").style.transform = "rotate(" + (rotate) + "deg)";
        }
      }, false);
      document.addEventListener("mouseup", function (e) { mouseDown = false; }, false);
 
    }
    function conRender1() {
      var con = document.querySelector(".con1");
      var len = 13;
      var deg = 360 / len;
      for (var i = 0; i < len; i++) {
        var dom = document.createElement("p");
        dom.style.transform = "rotate(-" + i * deg + "deg)";
        dom.innerHTML = "财务管理" + i;
        dom.setAttribute("index1", i)
        con.appendChild(dom)
      }
      var mouseDown = false;
      var startX = 0;
      var startY = 0;
      var endX = 0;
      var endY = 0;
      var rotate = 0;
      con.addEventListener("mousedown", function (e) {
        mouseDown = true;
        startX = e.pageX;
        startY = e.pageY;
      }, false);
      con.addEventListener("mousemove", function (e) {
        if (mouseDown) {
          endX = e.pageX;
          endY = e.pageY;
          var distance = Math.sqrt(Math.pow((endX - startX), 2) + Math.pow((endY - startY), 2))
          if (endX - startX < 0 || endY - startY < 0) {
            distance = -distance
          }
          rotate += distance
          con.style.transform = "rotate(" + (rotate / 4) + "deg)";
          startX = e.pageX;
          startY = e.pageY;
          var index = Math.round((rotate / 4) / deg);
          var cons = document.querySelectorAll(".con1>p")
          for (var i = 0, len = cons.length; i < len; i++) {
            cons[i].style.color = "black"
          }
          document.querySelector("p[index1=\"" + index % len + "\"]").style.color = "red"
        }
      }, false);
      document.addEventListener("mouseup", function (e) { mouseDown = false; }, false);
 
    }
  </script>
</body>
 
</html>

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