---
title: mousedown
slug: Web/API/Element/mousedown_event
translation_of: Web/API/Element/mousedown_event
---
<p>Событие <code>mousedown</code> срабатывает, когда кнопка указывающего устройства (к примеру, мыши) нажата над элементом.</p>

<h2 id="Общая_информация">Общая информация</h2>

<dl>
 <dt style="float: left; text-align: right; width: 120px;">Спецификация</dt>
 <dd style="margin: 0 0 0 120px;"><a class="external" href="http://www.w3.org/TR/DOM-Level-3-Events/#event-type-mousedown">DOM L3</a></dd>
 <dt style="float: left; text-align: right; width: 120px;">Интерфейс</dt>
 <dd style="margin: 0 0 0 120px;">{{domxref("MouseEvent")}}</dd>
 <dt style="float: left; text-align: right; width: 120px;">Всплывающее</dt>
 <dd style="margin: 0 0 0 120px;">Да</dd>
 <dt style="float: left; text-align: right; width: 120px;">Отменяемое</dt>
 <dd style="margin: 0 0 0 120px;">Да</dd>
 <dt style="float: left; text-align: right; width: 120px;">Цель</dt>
 <dd style="margin: 0 0 0 120px;">Элемент</dd>
 <dt style="float: left; text-align: right; width: 120px;">Действие по умолчанию</dt>
 <dd style="margin: 0 0 0 120px;">Различное: инициация перетаскивания, выделения текста, прокрутки или масштабирования (в сочетании с нажатием колеса при поддержке такового)</dd>
</dl>

<h2 id="Свойства">Свойства</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Property</th>
   <th scope="col">Type</th>
   <th scope="col">Description</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td><code>target</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/EventTarget" title="EventTarget is an interface implemented by objects that can receive events and may have listeners for them."><code>EventTarget</code></a></td>
   <td>The event target (the topmost target in the DOM tree).</td>
  </tr>
  <tr>
   <td><code>type</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/DOMString" title="DOMString is a UTF-16 String. As JavaScript already uses such strings, DOMString is mapped directly to a String."><code>DOMString</code></a></td>
   <td>The type of event.</td>
  </tr>
  <tr>
   <td><code>bubbles</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/Boolean" title="The Boolean object is an object wrapper for a boolean value."><code>Boolean</code></a></td>
   <td>Whether the event normally bubbles or not</td>
  </tr>
  <tr>
   <td><code>cancelable</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/Boolean" title="The Boolean object is an object wrapper for a boolean value."><code>Boolean</code></a></td>
   <td>Whether the event is cancellable or not?</td>
  </tr>
  <tr>
   <td><code>view</code> {{readonlyInline}}</td>
   <td><a class="new" href="/en-US/docs/Web/API/WindowProxy" rel="nofollow" title="The documentation about this has not yet been written; please consider contributing!"><code>WindowProxy</code></a></td>
   <td><a href="/en-US/docs/Web/API/Document/defaultView" title="In browsers, document.defaultView returns the window object associated with a document, or null if none is available."><code>document.defaultView</code></a> (<code>window</code> of the document)</td>
  </tr>
  <tr>
   <td><code>detail</code> {{readonlyInline}}</td>
   <td><code>long</code> (<code>float</code>)</td>
   <td>A count of consecutive clicks that happened in a short amount of time, incremented by one.</td>
  </tr>
  <tr>
   <td><code>currentTarget</code> {{readonlyInline}}</td>
   <td>EventTarget</td>
   <td>The node that had the event listener attached.</td>
  </tr>
  <tr>
   <td><code>relatedTarget</code> {{readonlyInline}}</td>
   <td>EventTarget</td>
   <td>For <code>mouseover</code>, <code>mouseout</code>, <code>mouseenter</code> and <code>mouseleave</code> events: the target of the complementary event (the <code>mouseleave</code> target in the case of a <code>mouseenter</code> event). <code>null</code> otherwise.</td>
  </tr>
  <tr>
   <td><code>screenX</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The X coordinate of the mouse pointer in global (screen) coordinates.</td>
  </tr>
  <tr>
   <td><code>screenY</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The Y coordinate of the mouse pointer in global (screen) coordinates.</td>
  </tr>
  <tr>
   <td><code>clientX</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The X coordinate of the mouse pointer in local (DOM content) coordinates.</td>
  </tr>
  <tr>
   <td><code>clientY</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The Y coordinate of the mouse pointer in local (DOM content) coordinates.</td>
  </tr>
  <tr>
   <td><code>button</code> {{readonlyInline}}</td>
   <td>unsigned short</td>
   <td>The button number that was pressed when the mouse event was fired: Left button=0, middle button=1 (if present), right button=2. For mice configured for left handed use in which the button actions are reversed the values are instead read from right to left.</td>
  </tr>
  <tr>
   <td><code>buttons</code> {{readonlyInline}}</td>
   <td>unsigned short</td>
   <td>The buttons being pressed when the mouse event was fired: Left button=1, Right button=2, Middle (wheel) button=4, 4th button (typically, "Browser Back" button)=8, 5th button (typically, "Browser Forward" button)=16. If two or more buttons are pressed, returns the logical sum of the values. E.g., if Left button and Right button are pressed, returns 3 (=1 | 2). <a href="/en-US/docs/Web/API/MouseEvent">More info</a>.</td>
  </tr>
  <tr>
   <td><code>mozPressure</code> {{readonlyInline}}</td>
   <td>float</td>
   <td>The amount of pressure applied to a touch or tabdevice when generating the event; this value ranges between 0.0 (minimum pressure) and 1.0 (maximum pressure).</td>
  </tr>
  <tr>
   <td><code>ctrlKey</code> {{readonlyInline}}</td>
   <td>boolean</td>
   <td><code>true</code> if the control key was down when the event was fired. <code>false</code> otherwise.</td>
  </tr>
  <tr>
   <td><code>shiftKey</code> {{readonlyInline}}</td>
   <td>boolean</td>
   <td><code>true</code> if the shift key was down when the event was fired. <code>false</code> otherwise.</td>
  </tr>
  <tr>
   <td><code>altKey</code> {{readonlyInline}}</td>
   <td>boolean</td>
   <td><code>true</code> if the alt key was down when the event was fired. <code>false</code> otherwise.</td>
  </tr>
  <tr>
   <td><code>metaKey</code> {{readonlyInline}}</td>
   <td>boolean</td>
   <td><code>true</code> if the meta key was down when the event was fired. <code>false</code> otherwise.</td>
  </tr>
 </tbody>
</table>

<h2 id="Связанные_события">Связанные события</h2>

<ul>
 <li>{{event("mousedown")}}</li>
 <li>{{event("mouseup")}}</li>
 <li>{{event("mousemove")}}</li>
 <li>{{event("click")}}</li>
 <li>{{event("dblclick")}}</li>
 <li>{{event("mouseover")}}</li>
 <li>{{event("mouseout")}}</li>
 <li>{{event("mouseenter")}}</li>
 <li>{{event("mouseleave")}}</li>
 <li>{{event("contextmenu")}}</li>
</ul>