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Paul O’Shannessy
528 lines
20 KiB
HTML
528 lines
20 KiB
HTML
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Event System
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Reconciliation
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<a href="/react/tips/children-props-type.html">Type of the Children props</a>
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<a href="/react/tips/controlled-input-null-value.html">Value of null for Controlled Input</a>
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<a href="/react/tips/componentWillReceiveProps-not-triggered-after-mounting.html">componentWillReceiveProps Not Triggered After Mounting</a>
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<a href="/react/tips/props-in-getInitialState-as-anti-pattern.html">Props in getInitialState Is an Anti-Pattern</a>
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<a href="/react/tips/dom-event-listeners.html">DOM Event Listeners in a Component</a>
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<a href="/react/tips/initial-ajax.html">Load Initial Data via AJAX</a>
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<a href="/react/tips/false-in-jsx.html">False in JSX</a>
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<a href="/react/tips/communicate-between-components.html">Communicate Between Components</a>
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<a href="/react/tips/expose-component-functions.html">Expose Component Functions</a>
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</div>
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</div>
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<div class="inner-content">
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<h1>Event System</h1>
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<div class="subHeader"></div>
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<h2><a class="anchor" name="syntheticevent"></a>SyntheticEvent <a class="hash-link" href="#syntheticevent">#</a></h2>
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<p>Your event handlers will be passed instances of <code>SyntheticEvent</code>, a cross-browser wrapper around the browser's native event. It has the same interface as the browser's native event, including <code>stopPropagation()</code> and <code>preventDefault()</code>, except the events work identically across all browsers.</p>
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<p>If you find that you need the underlying browser event for some reason, simply use the <code>nativeEvent</code> attribute to get it. Every <code>SyntheticEvent</code> object has the following attributes:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">bubbles</span>
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<span class="kr">boolean</span> <span class="nx">cancelable</span>
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<span class="nx">DOMEventTarget</span> <span class="nx">currentTarget</span>
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<span class="kr">boolean</span> <span class="nx">defaultPrevented</span>
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<span class="nb">Number</span> <span class="nx">eventPhase</span>
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<span class="kr">boolean</span> <span class="nx">isTrusted</span>
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<span class="nx">DOMEvent</span> <span class="nx">nativeEvent</span>
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<span class="k">void</span> <span class="nx">preventDefault</span><span class="p">()</span>
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<span class="k">void</span> <span class="nx">stopPropagation</span><span class="p">()</span>
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<span class="nx">DOMEventTarget</span> <span class="nx">target</span>
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<span class="nb">Date</span> <span class="nx">timeStamp</span>
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<span class="nb">String</span> <span class="nx">type</span>
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</code></pre></div><h2><a class="anchor" name="supported-events"></a>Supported Events <a class="hash-link" href="#supported-events">#</a></h2>
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<p>React normalizes events so that they have consistent properties across
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different browsers.</p>
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<h3><a class="anchor" name="clipboard-events"></a>Clipboard Events <a class="hash-link" href="#clipboard-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onCopy onCut onPaste
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="nx">DOMDataTransfer</span> <span class="nx">clipboardData</span>
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</code></pre></div><h3><a class="anchor" name="keyboard-events"></a>Keyboard Events <a class="hash-link" href="#keyboard-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onKeyDown onKeyPress onKeyUp
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">altKey</span>
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<span class="kr">boolean</span> <span class="nx">ctrlKey</span>
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<span class="nb">Number</span> <span class="nx">charCode</span>
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<span class="nb">String</span> <span class="nx">key</span>
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<span class="nb">Number</span> <span class="nx">keyCode</span>
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<span class="nb">String</span> <span class="nx">locale</span>
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<span class="nb">Number</span> <span class="nx">location</span>
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<span class="kr">boolean</span> <span class="nx">metaKey</span>
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<span class="kr">boolean</span> <span class="nx">repeat</span>
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<span class="kr">boolean</span> <span class="nx">shiftKey</span>
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<span class="nb">Number</span> <span class="nx">which</span>
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</code></pre></div><h3><a class="anchor" name="focus-events"></a>Focus Events <a class="hash-link" href="#focus-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onFocus onBlur
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="nx">DOMEventTarget</span> <span class="nx">relatedTarget</span>
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</code></pre></div><h3><a class="anchor" name="form-events"></a>Form Events <a class="hash-link" href="#form-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onChange onInput onSubmit
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</code></pre></div>
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<p>For more information about the onChange event, see <a href="/react/docs/forms.html">Forms</a>.</p>
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<h3><a class="anchor" name="mouse-events"></a>Mouse Events <a class="hash-link" href="#mouse-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onClick onDoubleClick onDrag onDragEnd onDragEnter onDragExit onDragLeave
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onDragOver onDragStart onDrop onMouseDown onMouseEnter onMouseLeave
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onMouseMove onMouseOut onMouseOver onMouseUp
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</code></pre></div>
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<p>Properties: </p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">altKey</span>
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<span class="nb">Number</span> <span class="nx">button</span>
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<span class="nb">Number</span> <span class="nx">buttons</span>
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<span class="nb">Number</span> <span class="nx">clientX</span>
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<span class="nb">Number</span> <span class="nx">clientY</span>
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<span class="kr">boolean</span> <span class="nx">ctrlKey</span>
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<span class="kr">boolean</span> <span class="nx">metaKey</span>
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<span class="nb">Number</span> <span class="nx">pageX</span>
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<span class="nb">Number</span> <span class="nx">pageY</span>
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<span class="nx">DOMEventTarget</span> <span class="nx">relatedTarget</span>
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<span class="nb">Number</span> <span class="nx">screenX</span>
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<span class="nb">Number</span> <span class="nx">screenY</span>
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<span class="kr">boolean</span> <span class="nx">shiftKey</span>
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</code></pre></div><h3><a class="anchor" name="touch-events"></a>Touch events <a class="hash-link" href="#touch-events">#</a></h3>
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<p>To enable touch events, call <code>React.initializeTouchEvents(true)</code> before
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rendering any component.</p>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onTouchCancel onTouchEnd onTouchMove onTouchStart
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">altKey</span>
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<span class="nx">DOMTouchList</span> <span class="nx">changedTouches</span>
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<span class="kr">boolean</span> <span class="nx">ctrlKey</span>
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<span class="kr">boolean</span> <span class="nx">metaKey</span>
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<span class="kr">boolean</span> <span class="nx">shiftKey</span>
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<span class="nx">DOMTouchList</span> <span class="nx">targetTouches</span>
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<span class="nx">DOMTouchList</span> <span class="nx">touches</span>
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</code></pre></div><h3><a class="anchor" name="ui-events"></a>UI Events <a class="hash-link" href="#ui-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onScroll
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="nb">Number</span> <span class="nx">detail</span>
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<span class="nx">DOMAbstractView</span> <span class="nx">view</span>
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</code></pre></div><h3><a class="anchor" name="wheel-events"></a>Wheel Events <a class="hash-link" href="#wheel-events">#</a></h3>
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<p>Event names:</p>
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<div class="highlight"><pre><code class="text language-text" data-lang="text">onWheel
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</code></pre></div>
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<p>Properties:</p>
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<div class="highlight"><pre><code class="javascript language-javascript" data-lang="javascript"><span class="nb">Number</span> <span class="nx">deltaX</span>
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<span class="nb">Number</span> <span class="nx">deltaMode</span>
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<span class="nb">Number</span> <span class="nx">deltaY</span>
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|
<span class="nb">Number</span> <span class="nx">deltaZ</span>
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|
</code></pre></div>
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