Initial commit: 云印享后台管理系统

node_modules/rc-util/lib/hooks/useMemo.js

@@ -0,0 +1,16 @@
+"use strict";
+
+var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = useMemo;
+var React = _interopRequireWildcard(require("react"));
+function useMemo(getValue, condition, shouldUpdate) {
+  var cacheRef = React.useRef({});
+  if (!('value' in cacheRef.current) || shouldUpdate(cacheRef.current.condition, condition)) {
+    cacheRef.current.value = getValue();
+    cacheRef.current.condition = condition;
+  }
+  return cacheRef.current.value;
+}