first commit

frontend/node_modules/rc-picker/es/PickerInput/hooks/useDelayState.js

@@ -0,0 +1,43 @@
+import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
+import { useEvent, useMergedState } from 'rc-util';
+import raf from "rc-util/es/raf";
+import React from 'react';
+
+/**
+ * Will be `true` immediately for next effect.
+ * But will be `false` for a delay of effect.
+ */
+export default function useDelayState(value, defaultValue, onChange) {
+  var _useMergedState = useMergedState(defaultValue, {
+      value: value
+    }),
+    _useMergedState2 = _slicedToArray(_useMergedState, 2),
+    state = _useMergedState2[0],
+    setState = _useMergedState2[1];
+  var nextValueRef = React.useRef(value);
+
+  // ============================= Update =============================
+  var rafRef = React.useRef();
+  var cancelRaf = function cancelRaf() {
+    raf.cancel(rafRef.current);
+  };
+  var doUpdate = useEvent(function () {
+    setState(nextValueRef.current);
+    if (onChange && state !== nextValueRef.current) {
+      onChange(nextValueRef.current);
+    }
+  });
+  var updateValue = useEvent(function (next, immediately) {
+    cancelRaf();
+    nextValueRef.current = next;
+    if (next || immediately) {
+      doUpdate();
+    } else {
+      rafRef.current = raf(doUpdate);
+    }
+  });
+  React.useEffect(function () {
+    return cancelRaf;
+  }, []);
+  return [state, updateValue];
+}