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---
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")}}
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