---
title: reading
slug: Web/API/AmbientLightSensor/illuminance
translation_of: Web/API/AmbientLightSensor/illuminance
translation_of_original: Web/API/AmbientLightSensor/reading
original_slug: Web/API/AmbientLightSensor/reading
---
<p>{{SeeCompatTable}}{{APIRef("Ambient Light Sensor API")}}</p>

<p><span class="seoSummary">{{domxref("AmbientLightSensor")}} 接口的 read-only 属性 <strong>reading</strong> 返回一个访问 {{domxref('AmbientLightSensorReading')}} 的接口, 包含当前的光亮级别。</span></p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var sensorReading = AmbientLightLevel.reading</pre>

<h3 id="返回值">返回值</h3>

<p>{{domxref('AmbientLightSensorReading')}} 接口.</p>

<h2 id="用例">用例</h2>

<pre class="brush: js">// TBD</pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('AmbientLight')}}</td>
   <td>{{Spec2('AmbientLight')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

{{Compat("api.AmbientLightSensor.illuminance")}}