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frontend/node_modules/rc-util/lib/PureRenderMixin.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _isEqual = _interopRequireDefault(require("./isEqual"));
+/**
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule ReactComponentWithPureRenderMixin
+ */
+
+function shallowCompare(instance, nextProps, nextState) {
+  return !(0, _isEqual.default)(instance.props, nextProps, true) || !(0, _isEqual.default)(instance.state, nextState, true);
+}
+
+/**
+ * If your React component's render function is "pure", e.g. it will render the
+ * same result given the same props and state, provide this mixin for a
+ * considerable performance boost.
+ *
+ * Most React components have pure render functions.
+ *
+ * Example:
+ *
+ *   var ReactComponentWithPureRenderMixin =
+ *     require('ReactComponentWithPureRenderMixin');
+ *   React.createClass({
+ *     mixins: [ReactComponentWithPureRenderMixin],
+ *
+ *     render: function() {
+ *       return <div className={this.props.className}>foo</div>;
+ *     }
+ *   });
+ *
+ * Note: This only checks shallow equality for props and state. If these contain
+ * complex data structures this mixin may have false-negatives for deeper
+ * differences. Only mixin to components which have simple props and state, or
+ * use `forceUpdate()` when you know deep data structures have changed.
+ *
+ * See https://facebook.github.io/react/docs/pure-render-mixin.html
+ */
+var ReactComponentWithPureRenderMixin = {
+  shouldComponentUpdate: function shouldComponentUpdate(nextProps, nextState) {
+    return shallowCompare(this, nextProps, nextState);
+  }
+};
+var _default = exports.default = ReactComponentWithPureRenderMixin;