leader-line-vue移动svg（指示线元素）到另外一个容器中(定位基准)

leader-line-vue移动svg（指示线元素）到另外一个容器中(定位基准)

leader-line 绘制的svg指示线是利用相对于 body 的 absolute 定位。而在移动端给body的布局高度为 height:100%，页面是在body局部滚动的，所以指示线的位置相对body始终是固定的，在屏幕上看起来也就是固定不变的。leader-line 绘制的svg指示线是利用相对于 body 的 absolute 定位。而在移动端给body的布局高度为 height:100%，页面是在body局部滚动的，所以指示线的位置相对body始终是固定的，在屏幕上看起来也就是固定不变的。

点击查看代码

<template>
  <div class="HelloWorld">
    <div id="frame">
      <div id="container">
        <div id="terminal-1" class="terminal"></div>
        <div id="terminal-2" class="terminal"></div>
        <div id="terminal-3" class="terminal"></div>
      </div>
    </div>

    <svg version="1.1" id="svg-clip">
      <defs>
        <rect id="clip-rect" />
        <clipPath id="clip-1">
          <use xlink:href="#clip-rect" />
        </clipPath>
        <clipPath id="clip-2">
          <use xlink:href="#clip-rect" />
        </clipPath>
      </defs>
    </svg>
  </div>
</template>
<script>
import LeaderLine from "leader-line-vue";
import AnimEvent from "anim-event";
export default {
  name: "HelloWorld",
  data() {
    return {};
  },
  mounted() {
    this.$nextTick(() => {
      this.InitFun();
    });
  },
  beforeDestroy() {
    /**
     * 离开页面时销毁所有line
     */
    // this.ClearAllLine();
  },
  methods: {
    InitFun() {
      var elmFrame = document.getElementById("frame"),
        rectFrame = elmFrame.getBoundingClientRect(),
        elmClipRect = document.getElementById("clip-rect"),
        line1 = LeaderLine.setLine(
          document.getElementById("terminal-1"),
          document.getElementById("terminal-2")
        ),
        elmLine1 = document.querySelector(".leader-line:last-of-type"),
        elmRefClipRect1 = document.querySelector("#clip-1>use"),
        line2 = LeaderLine.setLine(
          document.getElementById("terminal-3"),
          line1.end
        ),
        elmLine2 = document.querySelector(".leader-line:last-of-type"),
        elmRefClipRect2 = document.querySelector("#clip-2>use");

      function update() {
        line1.position();
        line2.position();
        // Adjust clip position
        var rectLine = elmLine1.getBoundingClientRect();
        elmRefClipRect1.x.baseVal.value = rectFrame.left - rectLine.left;
        elmRefClipRect1.y.baseVal.value = rectFrame.top - rectLine.top;
        rectLine = elmLine2.getBoundingClientRect();
        elmRefClipRect2.x.baseVal.value = rectFrame.left - rectLine.left;
        elmRefClipRect2.y.baseVal.value = rectFrame.top - rectLine.top;
      }

      // Init clip size
      elmClipRect.width.baseVal.value = elmFrame.clientWidth;
      elmClipRect.height.baseVal.value = elmFrame.clientHeight;
      elmLine1.style.clipPath = "url(#clip-1)";
      elmLine2.style.clipPath = "url(#clip-2)";
      elmFrame.addEventListener("scroll", AnimEvent.add(update), false);
      update();
    },
    /**
     * 监听滚动条变化各部分连线跟随变化
     */
    AddEventListenerSrollFun() {
      window.addEventListener(
        "scroll",
        AnimEvent.add(() => {
          d3.selectAll(".leader-line").remove();
          this.lines1 = [];
          this.lines2 = [];
          this.lines3 = [];
          this.DrawLeaderLine1();
          this.DrawLeaderLine2();
          this.DrawLeaderLine3();
        }),
        false
      );
      let scrollableBox1 = document.getElementsByClassName("FirstContent")[0];
      scrollableBox1.addEventListener(
        "scroll",
        AnimEvent.add(() => {
          d3.selectAll(".leader-line").remove();
          this.lines1 = [];
          this.lines2 = [];
          this.lines3 = [];
          this.DrawLeaderLine1();
          this.DrawLeaderLine2();
          this.DrawLeaderLine3();
        }),
        false
      );
      let scrollableBox2 = document.getElementsByClassName("SecondContent")[0];
      scrollableBox2.addEventListener(
        "scroll",
        AnimEvent.add(() => {
          d3.selectAll(".leader-line").remove();
          this.lines1 = [];
          this.lines2 = [];
          this.lines3 = [];
          this.DrawLeaderLine1();
          this.DrawLeaderLine2();
          this.DrawLeaderLine3();
        }),
        false
      );
      let scrollableBox3 = document.getElementsByClassName("ThirdContent")[0];
      scrollableBox3.addEventListener(
        "scroll",
        AnimEvent.add(() => {
          d3.selectAll(".leader-line").remove();
          this.lines1 = [];
          this.lines2 = [];
          this.lines3 = [];
          this.DrawLeaderLine1();
          this.DrawLeaderLine2();
          this.DrawLeaderLine3();
        }),
        false
      );
      let scrollableBox4 = document.getElementsByClassName("FourContent")[0];
      scrollableBox4.addEventListener(
        "scroll",
        AnimEvent.add(() => {
          d3.selectAll(".leader-line").remove();
          this.lines1 = [];
          this.lines2 = [];
          this.lines3 = [];
          this.DrawLeaderLine1();
          this.DrawLeaderLine2();
          this.DrawLeaderLine3();
        }),
        false
      );
    },

    ClearAllLine() {
      if (this.lines1 && this.lines1.length) {
        this.lines1.forEach((line) => {
          line.remove();
        });
      }
      if (this.lines2 && this.lines2.length) {
        this.lines2.forEach((line) => {
          line.remove();
        });
      }
      if (this.lines3 && this.lines3.length) {
        this.lines3.forEach((line) => {
          line.remove();
        });
      }
    },
  },
};
</script>
<style lang="scss" scoped>
.HelloWorld {
  display: flex;
  flex-flow: row nowrap;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  background: #1f4760;
}
#frame {
  margin: 64px;
  width: 540px;
  height: 540px;
  overflow: scroll;
}

#container {
  width: 880px;
  height: 880px;
  position: relative;
  background-color: beige;
}

.terminal {
  width: 32px;
  height: 32px;
  position: absolute;
  background-color: blue;
}

#terminal-1 {
  left: 32px;
  top: 32px;
}

#terminal-2 {
  left: 416px;
  top: 320px;
}

#terminal-3 {
  left: 64px;
  top: 180px;
}

#svg-clip {
  width: 1px; /* for Gecko bug */
  height: 1px; /* for Gecko bug */
}
</style>

#### GitHub