snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

react/features/stream-effects/virtual-background/workers/TimerWorker.ts

@@ -0,0 +1,67 @@
+
+/**
+ * SET_TIMEOUT constant is used to set interval and it is set in
+ * the id property of the request.data property. TimeMs property must
+ * also be set.
+ *
+ * ```
+ * //Request.data example:
+ * {
+ *      id: SET_TIMEOUT,
+ *      timeMs: 33
+ * }
+ * ```
+ */
+export const SET_TIMEOUT = 1;
+
+/**
+ * CLEAR_TIMEOUT constant is used to clear the interval and it is set in
+ * the id property of the request.data property.
+ *
+ * ```
+ * {
+ *      id: CLEAR_TIMEOUT
+ * }
+ * ```
+ */
+export const CLEAR_TIMEOUT = 2;
+
+/**
+ * TIMEOUT_TICK constant is used as response and it is set in the id property.
+ *
+ * ```
+ * {
+ *      id: TIMEOUT_TICK
+ * }
+ * ```
+ */
+export const TIMEOUT_TICK = 3;
+
+/**
+ * The following code is needed as string to create a URL from a Blob.
+ * The URL is then passed to a WebWorker. Reason for this is to enable
+ * use of setInterval that is not throttled when tab is inactive.
+ */
+const code = `
+    var timer;
+
+    onmessage = function(request) {
+        switch (request.data.id) {
+        case ${SET_TIMEOUT}: {
+            timer = setTimeout(() => {
+                postMessage({ id: ${TIMEOUT_TICK} });
+            }, request.data.timeMs);
+            break;
+        }
+        case ${CLEAR_TIMEOUT}: {
+            if (timer) {
+                clearTimeout(timer);
+            }
+            break;
+        }
+        }
+    };
+`;
+
+// @ts-ignore
+export const timerWorkerScript = URL.createObjectURL(new Blob([ code ], { type: 'application/javascript' }));