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