CanvasContext.setLineJoin

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CanvasContext.setLineJoin(lineJoin)

<!-- index.ttml -->
<view>
  下列线段端点样式分别为：
  <block tt:for="{{lineGaps}}">
    <view>{{item}}</view>
  </block>
</view>
<canvas canvas-id="myCanvas"></canvas>

// index.js
Page({
  data: {
    lineGaps: ["butt", "round", "square"],
  },
  onLoad: function (options) {
    const canvasCtx = tt.createCanvasContext("myCanvas");
    canvasCtx.beginPath();
    canvasCtx.setLineCap("butt");
    canvasCtx.setLineWidth(10);
    canvasCtx.moveTo(10, 30);
    canvasCtx.lineTo(150, 30);
    canvasCtx.stroke();
    canvasCtx.beginPath();
    canvasCtx.setLineCap("round");
    canvasCtx.setLineWidth(10);
    canvasCtx.moveTo(10, 50);
    canvasCtx.lineTo(150, 50);
    canvasCtx.stroke();
    canvasCtx.beginPath();
    canvasCtx.setLineCap("square");
    canvasCtx.setLineWidth(10);
    canvasCtx.moveTo(10, 70);
    canvasCtx.lineTo(150, 70);
    canvasCtx.stroke();
    canvasCtx.draw();
  },
});