wip: ricraf polyfill

packages/web/src/ricpolyfill.js

@@ -0,0 +1,28 @@
+const requestIdleCallback =
+  (typeof self !== 'undefined' &&
+    self.requestIdleCallback &&
+    self.requestIdleCallback.bind(window)) ||
+  function (cb) {
+    const start = Date.now();
+    return setTimeout(() => {
+      cb({
+        didTimeout: false,
+        timeRemaining: function () {
+          return Math.max(0, 50 - (Date.now() - start));
+        },
+      });
+    }, 1);
+  };
+
+const cancelIdleCallback =
+  (typeof self !== 'undefined' &&
+    self.cancelIdleCallback &&
+    self.cancelIdleCallback.bind(window)) ||
+  function (id) {
+    return clearTimeout(id);
+  };
+
+if (typeof window !== 'undefined') {
+  window.requestIdleCallback = requestIdleCallback;
+  window.cancelIdleCallback = cancelIdleCallback;
+}