haveno-ts/docs/interfaces/App._internal_.DeprecatedLifecycle.html

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<!DOCTYPE html><html class="default"><head><meta charSet="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>DeprecatedLifecycle | haveno-ui-poc</title><meta name="description" content="Documentation for haveno-ui-poc"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="stylesheet" href="../assets/style.css"/><link rel="stylesheet" href="../assets/highlight.css"/><script async src="../assets/search.js" id="search-script"></script></head><body><script>document.body.classList.add(localStorage.getItem("tsd-theme") || "os")</script><header><div class="tsd-page-toolbar"><div class="container"><div class="table-wrap"><div class="table-cell" id="tsd-search" data-base=".."><div class="field"><label for="tsd-search-field" class="tsd-widget search no-caption">Search</label><input type="text" id="tsd-search-field"/></div><ul class="results"><li class="state loading">Preparing search index...</li><li class="state failure">The search index is not available</li></ul><a href="../index.html" class="title">haveno-ui-poc</a></div><div class="table-cell" id="tsd-widgets"><div id="tsd-filter"><a href="#" class="tsd-widget options no-caption" data-toggle="options">Options</a><div class="tsd-filter-group"><div class="tsd-select" id="tsd-filter-visibility"><span class="tsd-select-label">All</span><ul class="tsd-select-list"><li data-value="public">Public</li><li data-value="protected">Public/Protected</li><li data-value="private" class="selected">All</li></ul></div> <input type="checkbox" id="tsd-filter-inherited" checked/><label class="tsd-widget" for="tsd-filter-inherited">Inherited</label><input type="checkbox" id="tsd-filter-externals" checked/><label class="tsd-widget" for="tsd-filter-externals">Externals</label></div></div><a href="#" class="tsd-widget menu no-caption" data-toggle="menu">Menu</a></div></div></div></div><div class="tsd-page-title"><div class="container"><ul class="tsd-breadcrumb"><li><a href="../modules.html">haveno-ui-poc</a></li><li><a href="../modules/App.html">App</a></li><li><a href="../modules/App._internal_.html">&lt;internal&gt;</a></li><li><a href="App._internal_.DeprecatedLifecycle.html">DeprecatedLifecycle</a></li></ul><h1>Interface DeprecatedLifecycle&lt;P, S&gt; </h1></div></div></header><div class="container container-main"><div class="row"><div class="col-8 col-content"><section class="tsd-panel tsd-type-parameters"><h3>Type parameters</h3><ul class="tsd-type-parameters"><li><h4>P</h4></li><li><h4>S</h4></li></ul></section><section class="tsd-panel tsd-hierarchy"><h3>Hierarchy</h3><ul class="tsd-hierarchy"><li><span class="target">DeprecatedLifecycle</span><ul class="tsd-hierarchy"><li><a href="App._internal_.ComponentLifecycle.html" class="tsd-signature-type" data-tsd-kind="Interface">ComponentLifecycle</a></li></ul></li></ul></section><section class="tsd-panel-group tsd-index-group"><h2>Index</h2><section class="tsd-panel tsd-index-panel"><div class="tsd-index-content"><section class="tsd-index-section tsd-is-external"><h3>Methods</h3><ul class="tsd-index-list"><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#UNSAFE_componentWillMount" class="tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Mount</a></li><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#UNSAFE_componentWillReceiveProps" class="tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Receive<wbr/>Props</a></li><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#UNSAFE_componentWillUpdate" class="tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Update</a></li><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#componentWillMount" class="tsd-kind-icon">component<wbr/>Will<wbr/>Mount</a></li><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#componentWillReceiveProps" class="tsd-kind-icon">component<wbr/>Will<wbr/>Receive<wbr/>Props</a></li><li class="tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a href="App._internal_.DeprecatedLifecycle.html#componentWillUpdate" class="tsd-kind-icon">component<wbr/>Will<wbr/>Update</a></li></ul></section></div></section></section><section class="tsd-panel-group tsd-member-group tsd-is-external"><h2>Methods</h2><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="UNSAFE_componentWillMount" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> UNSAFE_<wbr/>component<wbr/>Will<wbr/>Mount<a href="#UNSAFE_componentWillMount" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Mount<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:710</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called immediately before mounting occurs, and before <code>Component#render</code>.
Avoid introducing any side-effects or subscriptions in this method.</p>
</div><div><p>This method will not stop working in React 17.</p>
<p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use componentDidMount or the constructor instead</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
</dd></dl></div><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="UNSAFE_componentWillReceiveProps" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> UNSAFE_<wbr/>component<wbr/>Will<wbr/>Receive<wbr/>Props<a href="#UNSAFE_componentWillReceiveProps" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Receive<wbr/>Props<span class="tsd-signature-symbol">(</span>nextProps<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span>, nextContext<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:742</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called when the component may be receiving new props.
React may call this even if props have not changed, so be sure to compare new and existing
props if you only want to handle changes.</p>
</div><div><p>Calling <code>Component#setState</code> generally does not trigger this method.</p>
<p>This method will not stop working in React 17.</p>
<p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use static getDerivedStateFromProps instead</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
</dd></dl></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>nextProps: <a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span></h5></li><li><h5>nextContext: <span class="tsd-signature-type">any</span></h5></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="UNSAFE_componentWillUpdate" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> UNSAFE_<wbr/>component<wbr/>Will<wbr/>Update<a href="#UNSAFE_componentWillUpdate" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">UNSAFE_<wbr/>component<wbr/>Will<wbr/>Update<span class="tsd-signature-symbol">(</span>nextProps<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span>, nextState<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">S</span><span class="tsd-signature-symbol">&gt;</span>, nextContext<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:770</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called immediately before rendering when new props or state is received. Not called for the initial render.</p>
</div><div><p>Note: You cannot call <code>Component#setState</code> here.</p>
<p>This method will not stop working in React 17.</p>
<p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use getSnapshotBeforeUpdate instead</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
</dd></dl></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>nextProps: <a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span></h5></li><li><h5>nextState: <a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">S</span><span class="tsd-signature-symbol">&gt;</span></h5></li><li><h5>nextContext: <span class="tsd-signature-type">any</span></h5></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="componentWillMount" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> component<wbr/>Will<wbr/>Mount<a href="#componentWillMount" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">component<wbr/>Will<wbr/>Mount<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:696</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called immediately before mounting occurs, and before <code>Component#render</code>.
Avoid introducing any side-effects or subscriptions in this method.</p>
</div><div><p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use componentDidMount or the constructor instead; will stop working in React 17</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#initializing-state</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
</dd></dl></div><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="componentWillReceiveProps" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> component<wbr/>Will<wbr/>Receive<wbr/>Props<a href="#componentWillReceiveProps" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">component<wbr/>Will<wbr/>Receive<wbr/>Props<span class="tsd-signature-symbol">(</span>nextProps<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span>, nextContext<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:725</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called when the component may be receiving new props.
React may call this even if props have not changed, so be sure to compare new and existing
props if you only want to handle changes.</p>
</div><div><p>Calling <code>Component#setState</code> generally does not trigger this method.</p>
<p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use static getDerivedStateFromProps instead; will stop working in React 17</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#updating-state-based-on-props</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
</dd></dl></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>nextProps: <a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span></h5></li><li><h5>nextContext: <span class="tsd-signature-type">any</span></h5></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-external"><a id="componentWillUpdate" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagOptional">Optional</span> component<wbr/>Will<wbr/>Update<a href="#componentWillUpdate" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-external"><li class="tsd-signature tsd-kind-icon">component<wbr/>Will<wbr/>Update<span class="tsd-signature-symbol">(</span>nextProps<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">P</span><span class="tsd-signature-symbol">&gt;</span>, nextState<span class="tsd-signature-symbol">: </span><a href="../modules/App._internal_.html#Readonly" class="tsd-signature-type" data-tsd-kind="Type alias">Readonly</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">S</span><span class="tsd-signature-symbol">&gt;</span>, nextContext<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in node_modules/@types/react/index.d.ts:755</li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
<p>Called immediately before rendering when new props or state is received. Not called for the initial render.</p>
</div><div><p>Note: You cannot call <code>Component#setState</code> here.</p>
<p>Note: the presence of getSnapshotBeforeUpdate or getDerivedStateFromProps
prevents this from being invoked.</p>
</div><dl class="tsd-comment-tags"><dt>deprecated</dt><dd><p>16.3, use getSnapshotBeforeUpdate instead; will stop working in React 17</p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#reading-dom-properties-before-an-update</a></p>
</dd><dt>see</dt><dd><p><a href="https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path">https://reactjs.org/blog/2018/03/27/update-on-async-rendering.html#gradual-migration-path</a></p>
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