Index: node_modules/d3-shape/src/curve/bump.js
===================================================================
--- node_modules/d3-shape/src/curve/bump.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-shape/src/curve/bump.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,75 @@
+import pointRadial from "../pointRadial.js";
+
+class Bump {
+  constructor(context, x) {
+    this._context = context;
+    this._x = x;
+  }
+  areaStart() {
+    this._line = 0;
+  }
+  areaEnd() {
+    this._line = NaN;
+  }
+  lineStart() {
+    this._point = 0;
+  }
+  lineEnd() {
+    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
+    this._line = 1 - this._line;
+  }
+  point(x, y) {
+    x = +x, y = +y;
+    switch (this._point) {
+      case 0: {
+        this._point = 1;
+        if (this._line) this._context.lineTo(x, y);
+        else this._context.moveTo(x, y);
+        break;
+      }
+      case 1: this._point = 2; // falls through
+      default: {
+        if (this._x) this._context.bezierCurveTo(this._x0 = (this._x0 + x) / 2, this._y0, this._x0, y, x, y);
+        else this._context.bezierCurveTo(this._x0, this._y0 = (this._y0 + y) / 2, x, this._y0, x, y);
+        break;
+      }
+    }
+    this._x0 = x, this._y0 = y;
+  }
+}
+
+class BumpRadial {
+  constructor(context) {
+    this._context = context;
+  }
+  lineStart() {
+    this._point = 0;
+  }
+  lineEnd() {}
+  point(x, y) {
+    x = +x, y = +y;
+    if (this._point === 0) {
+      this._point = 1;
+    } else {
+      const p0 = pointRadial(this._x0, this._y0);
+      const p1 = pointRadial(this._x0, this._y0 = (this._y0 + y) / 2);
+      const p2 = pointRadial(x, this._y0);
+      const p3 = pointRadial(x, y);
+      this._context.moveTo(...p0);
+      this._context.bezierCurveTo(...p1, ...p2, ...p3);
+    }
+    this._x0 = x, this._y0 = y;
+  }
+}
+
+export function bumpX(context) {
+  return new Bump(context, true);
+}
+
+export function bumpY(context) {
+  return new Bump(context, false);
+}
+
+export function bumpRadial(context) {
+  return new BumpRadial(context);
+}