feat(web): add `performance.timeOrigin` (#14489)

Add support for the `performance.timeOrigin` web API.

Co-authored-by: Jovi De Croock <decroockjovi@gmail.com>

5 files changed, 22 insertions, 3 deletions

diff --git a/cli/dts/lib.deno.shared_globals.d.ts b/cli/dts/lib.deno.shared_globals.d.ts
index 5f44e2d1b..b96c56dba 100644
--- a/cli/dts/lib.deno.shared_globals.d.ts
+++ b/cli/dts/lib.deno.shared_globals.d.ts
@@ -450,6 +450,7 @@ declare class Worker extends EventTarget {
 declare type PerformanceEntryList = PerformanceEntry[];
 
 declare class Performance {
+  readonly timeOrigin: number;
   constructor();
 
   /** Removes the stored timestamp with the associated name. */
diff --git a/cli/tests/unit/performance_test.ts b/cli/tests/unit/performance_test.ts
index 4c7d08d4e..252a31fc4 100644
--- a/cli/tests/unit/performance_test.ts
+++ b/cli/tests/unit/performance_test.ts
@@ -20,6 +20,13 @@ Deno.test({ permissions: { hrtime: false } }, async function performanceNow() {
   assert(totalTime >= 10);
 });
 
+Deno.test(function timeOrigin() {
+  const origin = performance.timeOrigin;
+
+  assert(origin > 0);
+  assert(Date.now() >= origin);
+});
+
 Deno.test(function performanceMark() {
   const mark = performance.mark("test");
   assert(mark instanceof PerformanceMark);
diff --git a/ext/web/15_performance.js b/ext/web/15_performance.js
index 41b40159e..07fa2a01d 100644
--- a/ext/web/15_performance.js
+++ b/ext/web/15_performance.js
@@ -24,6 +24,7 @@
   const illegalConstructorKey = Symbol("illegalConstructorKey");
   const customInspect = SymbolFor("Deno.customInspect");
   let performanceEntries = [];
+  let timeOrigin;
 
   webidl.converters["PerformanceMarkOptions"] = webidl
     .createDictionaryConverter(
@@ -77,6 +78,10 @@
     return webidl.converters.DOMString(V, opts);
   };
 
+  function setTimeOrigin(origin) {
+    timeOrigin = origin;
+  }
+
   function findMostRecent(
     name,
     type,
@@ -327,6 +332,10 @@
       webidl.illegalConstructor();
     }
 
+    get timeOrigin() {
+      return timeOrigin;
+    }
+
     clearMarks(markName = undefined) {
       webidl.assertBranded(this, PerformancePrototype);
       if (markName !== undefined) {
@@ -566,5 +575,6 @@
     PerformanceMeasure,
     Performance,
     performance: webidl.createBranded(Performance),
+    setTimeOrigin,
   };
 })(this);
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 07a350424..d83a2e6c8 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -9,6 +9,7 @@ delete Object.prototype.__proto__;
   const core = Deno.core;
   const {
     ArrayPrototypeMap,
+    DateNow,
     Error,
     FunctionPrototypeCall,
     FunctionPrototypeBind,
@@ -530,6 +531,7 @@ delete Object.prototype.__proto__;
       throw new Error("Worker runtime already bootstrapped");
     }
 
+    performance.setTimeOrigin(DateNow());
     const consoleFromV8 = window.console;
     const wrapConsole = window.__bootstrap.console.wrapConsole;
 
@@ -622,6 +624,7 @@ delete Object.prototype.__proto__;
       throw new Error("Worker runtime already bootstrapped");
     }
 
+    performance.setTimeOrigin(DateNow());
     const consoleFromV8 = window.console;
     const wrapConsole = window.__bootstrap.console.wrapConsole;
 
diff --git a/tools/wpt/expectation.json b/tools/wpt/expectation.json
index 67e256353..1c402903e 100644
--- a/tools/wpt/expectation.json
+++ b/tools/wpt/expectation.json
@@ -1179,7 +1179,6 @@
       "Performance interface: existence and properties of interface object",
       "Performance interface: existence and properties of interface prototype object",
       "Performance interface: attribute timeOrigin",
-      "Performance interface: performance must inherit property \"timeOrigin\" with the proper type",
       "Performance interface: default toJSON operation on performance",
       "Window interface: attribute performance"
     ],
@@ -1187,12 +1186,11 @@
       "Performance interface: existence and properties of interface object",
       "Performance interface: existence and properties of interface prototype object",
       "Performance interface: attribute timeOrigin",
-      "Performance interface: performance must inherit property \"timeOrigin\" with the proper type",
       "Performance interface: default toJSON operation on performance",
       "WorkerGlobalScope interface: attribute performance",
       "WorkerGlobalScope interface: self must inherit property \"performance\" with the proper type"
     ],
-    "window-worker-timeOrigin.window.html": false,
+    "window-worker-timeOrigin.window.html": true,
     "idlharness-shadowrealm.window.html": false
   },
   "streams": {