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frontend/node_modules/antd/lib/watermark/useSingletonCache.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = useSingletonCache;
+var React = _interopRequireWildcard(require("react"));
+var _isEqual = _interopRequireDefault(require("rc-util/lib/isEqual"));
+/**
+ * Singleton cache will only take latest `cacheParams` as key
+ * and return the result for callback matching.
+ */
+function useSingletonCache() {
+  const cacheRef = React.useRef([null, null]);
+  const getCache = (cacheKeys, callback) => {
+    const filteredKeys = cacheKeys.map(item => item instanceof HTMLElement || Number.isNaN(item) ? '' : item);
+    if (!(0, _isEqual.default)(cacheRef.current[0], filteredKeys)) {
+      cacheRef.current = [filteredKeys, callback()];
+    }
+    return cacheRef.current[1];
+  };
+  return getCache;
+}