Count label clicks once in inline events

src/default.js

@@ -1143,6 +1143,7 @@
       }
     }
 
+    var lastInlineElement;
     var inlineEvent = function (event) {
       var element = event.target;
       while (
@@ -1173,6 +1174,13 @@
               .trim()
               .slice(0, 200)
           : "";
+      } else {
+        // A label click also clicks its control, count one click per task
+        if (element === lastInlineElement) return;
+        lastInlineElement = element;
+        setTimeout(function () {
+          lastInlineElement = undefinedVar;
+        });
       }
       sendEvent(name, metadata, undefinedVar, trueVar);
     };

test/unit/inline-events.test.js

@@ -42,12 +42,13 @@ describe("inline events", function () {
 
   afterEach(() => windows.splice(0).forEach((window) => window.close()));
 
-  it("tracks nested clicks and new elements with current metadata", function () {
+  it("tracks nested clicks and new elements with current metadata", async function () {
     const dom = setup();
     dom.window.document.body.innerHTML =
       '<button data-simple-event="choose" data-simple-event-plan-name="pro"><span>Choose</span></button>';
     const button = dom.window.document.querySelector("button");
     click(dom, button.firstChild);
+    await new Promise((resolve) => setTimeout(resolve, 10));
     button.setAttribute("data-simple-event", "upgrade");
     button.setAttribute("data-simple-event-plan-name", "enterprise");
     click(dom, button);
@@ -57,6 +58,24 @@ describe("inline events", function () {
     ]);
   });
 
+  it("counts a label click once, and independent clicks separately", async function () {
+    const dom = setup();
+    dom.window.document.body.innerHTML =
+      '<div data-simple-event="plan"><label for="y">Yearly</label><input id="y" type="radio"><label><input type="checkbox"> <span>Monthly</span></label></div>';
+    const [forLabel, wrapLabel] = dom.window.document.querySelectorAll("label");
+    const nextTask = () => new Promise((resolve) => setTimeout(resolve, 10));
+    click(dom, forLabel);
+    await nextTask();
+    click(dom, wrapLabel.querySelector("span"));
+    await nextTask();
+    wrapLabel.control.click();
+    await nextTask();
+    forLabel.addEventListener("click", (event) => event.preventDefault());
+    click(dom, forLabel);
+    expect(forLabel.control.checked).to.equal(true);
+    expect(events(dom)).to.have.length(4);
+  });
+
   it("leaves link behavior and modified clicks untouched", function () {
     const dom = setup();
     dom.window.document.body.innerHTML =