Window navigator.onLine 属性

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JS 参考手册

JS 参考手册（类别排序）
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JavaScript

JS Array
JS Boolean
JS Class
JS Date
JS Error
JS Global
JS JSON
JS Map
JS Math
JS Number
JS Promise
JS RegExp
JS Set
JS String
JS 对象
JS 运算符
JS 运算符优先级
JS 语句
JS 类型化数组

Window

Object ng Window
Window Console
Window History
Window Location
Window Navigator
Window Screen

HTML DOM

HTML Document
HTML Element
HTML Attribute
HTML Event
HTML Event 对象
HTML Collection
HTML NodeList
HTML DOMTokenList
HTML Style

Web API

API Canvas
API Console
API Fetch
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API Geolocation
API History
API MediaQueryList
API Storage
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HTML Obheto

<a>
<abbr>
<address>
<area>
<article>
<aside>
<audio>
<b>
<base>
<bdo>
<blockquote>
<body>
<br>
<button>
<canvas>
<caption>
<cite>
<code>
<col>
<colgroup>
<datalist>
<dd>
<del>
<details>
<dfn>
<dialog>
<div>
<dl>
<dt>
<em>
<embed>
<fieldset>
<figcaption>
<figure>
<footer>
<form>
<head>
<header>
<h1> - <h6>
<hr>
<html>
<i>
<iframe>
<img>
<ins>
<input> pindutin
<input> kahon
<input> kulay
<input> araw
<input> oras-dati
<input> oras-dati lokal
<input> emeyl
<input> file
<input> nakatago
<input> larawan
<input> buwan
<input> bilang
<input> pahintulot
<input> radyo
<input> hanayin
<input> ireset
<input> pagsasaliksik
<input> isumite
<input> teksto
<input> oras
<input> url
<input> linggo
<kbd>
<label>
<legend>
<li>
<link>
<map>
<mark>
<menu>
<menuitem>
<meta>
<meter>
<nav>
<object>
<ol>
<optgroup>
<option>
<output>
<p>
<param>
<pre>
<progress>
<q>
<s>
<samp>
<script>
</a></li> <li><a href="/tl/jsref/dom_obj_time.html" title="HTML DOM Time Obheto"><time></a></li> <li><a href="/tl/jsref/dom_obj_title.html" title="HTML DOM Title Obheto"><title></a></li> <li><a href="/tl/jsref/dom_obj_track.html" title="HTML DOM Track Obheto"><track></a></li> <li><a href="/tl/jsref/dom_obj_u.html" title="HTML DOM Underline Obheto"><u></a></li> <li><a href="/tl/jsref/dom_obj_ul.html" title="HTML DOM Ul Obheto"><ul></a></li> <li><a href="/tl/jsref/dom_obj_var.html" title="HTML DOM Variable Obheto"><var></a></li> <li><a href="/tl/jsref/dom_obj_video.html" title="HTML DOM Video Obheto"><video></a></li> </ul> <h2>其他参考手册</h2> <ul> <li><a href="/tl/jsref/obj_cssstyledeclaration.html" title="CSSStyleDeclaration Obheto">CSSStyleDeclaration</a></li> <li><a href="/tl/jsref/jsref_type_conversion.html" title="JavaScript Type Conversion">JS 类型转换</a></li> </ul> </div> <div><h3><center> 选修课 </center><h3> <h2>课程推荐：</h2> <ul> <li><a href="/tl/howto/index.html" title="CodeW3C.com Baonbox">CodeW3C.com Baonbox</a></li> </ul> </div> </div> <div id="maincontent"> <div class="idea"> <a href="/"><button>English</button></a> <a href="/zh/"><button>中文</button></a> <a href="/oldzh/"><button>繁體中文</button></a> <a href="/ru/"><button>Русский</button></a> <a href="/fr/"><button>Français</button></a> <a href="/de/"><button>Deutsch</button></a> <a href="/es/"><button>Español</button></a> <a href="/pt/"><button>Português</button></a> <a href="/ja/"><button>日本語</button></a> <a href="/ko/"><button>한국어</button></a> <a href="/it/"><button>Italiano</button></a> <a href="/ar/"><button>عربي</button></a> <a href="/hi/"><button>हिंदी</button></a> <a href="/bn/"><button>বাংলা</button></a> <a href="/ms/"><button>Bahasa Malaysia</button></a> <a href="/my/"><button>မြန်မာ</button></a> <a href="/vi/"><button>Tiếng Việt</button></a> <a href="/th/"><button>ภาษาไทย</button></a> <a href="/lo/"><button>ລາວ</button></a> <a href="/id/"><button>Bahasa Indonesia</button></a> <a href="/ur/"><button>اردو</button></a> <a href="/ha/"><button>Hausa</button></a> <a href="/pl/"><button>Język polski</button></a> <a href="/pa/"><button>ਪੰਜਾਬੀ</button></a> <a href="/sv/"><button>Svenska</button></a> <a href="/da/"><button>Dansk</button></a> <a href="/nl/"><button>Nederlands</button></a> <a href="/tr/"><button>Türkçe</button></a> <a href="/fi/"><button>suom.</button></a> <a href="/el/"><button>Ελληνικά</button></a> <a href="/fa/"><button>فارسی</button></a> <a href="/sw/"><button>Kiswahili</button></a> <a href="/te/"><button>తెలుగు</button></a> <a href="/tl/"><button>wikang Galu</button></a> </div> <h1>Window navigator.onLine 属性</h1> <div class="prenextnav-ref"> <ul> <li> Previous Page <a href="/tl/jsref/prop_nav_language.html" title="Window navigator.language Atribute">language</a></li> <li> Next Page <a href="/tl/jsref/prop_nav_platform.html" title="Window navigator.platform Atribute">platform</a></li> <li> Go Back to Previous Level <a href="/tl/jsref/obj_navigator.html" title="Window Navigator">Window Navigator</a></li> </ul> </div> <div> <h2>定义和用法</h2> <p>如果浏览器在线，<code>onLine</code> 属性返回 <code>true</code>，否则返回 <code>false</code>。</p> <p><code>onLine</code> 属性是只读的。</p> <h3>提示：</h3> <p>这个属性是不可靠的。</p> <p>Ang kompyuter ay maaaring makonekta sa network nang hindi kailangan ng pagpasok sa Internet.</p> </div> <div> <h2>Halimbawa</h2> <h3>Halimbawa 1</h3> <p>Nag-iisa ang browser na online?</p> <pre class="language-js"> let online = navigator.onLine; </pre> <p class="tiy"><a target="_blank" href="/tl/tiy/t.html?f=jsck_navigator_online">Subukan nang personal</a></p> <h3>Halimbawa 2</h3> <p>Ipakita ang lahat ng navigation properties:</p> <p>Ipakita ang lahat ng Navigator na mga katangian:</p> <pre class="language-js"> let text = "<p>Browser CodeName: " + navigator.appCodeName + "</p>" + "<p>Browser Name: " + navigator.appName + "</p>" + "<p>Browser Version: " + navigator.appVersion + "</p>" + "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>" + "<p>Browser Language: " + navigator.language + "</p>" + "<p>Browser Online: " + navigator.onLine + "</p>" + "<p>Platform: " + navigator.platform + "</p>" + "<p>User-agent header: " + navigator.userAgent + "</p>"; </pre> <p class="tiy"><a target="_blank" href="/tl/tiy/t.html?f=jsck_navigator_all">Subukan nang personal</a></p> </div> <div> <h2>Pagsusulit</h2> <pre>navigator.onLine</pre> <h3>Bumalik na halaga</h3> <table class="dataintable"> <tr> <th style="width: 25%;">Uri</th> <th>Paglalarawan</th> </tr> <tr> <td>Boolean na halaga</td> <td>Kung ang browser ay online, maging totoo, kung hindi, maging maliit na.</td> </tr> </table> </div> <div> <h2>Browser Support</h2> <p>All Browsers Support <code>navigator.onLine</code>:</p> <table class="browser-support"> <tr> <th class="bsChrome">Chrome</th> <th class="bsIE">IE</th> <th class="bsEdge">Edge</th> <th class="bsFirefox">Firefox</th> <th class="bsSafari">Safari</th> <th class="bsOpera">Opera</th> </tr> <tr> <td>Chrome</td> <td>IE</td> <td>Edge</td> <td>Firefox</td> <td>Safari</td> <td>Opera</td> </tr> <tr> <td>Support</td> <td>Support</td> <td>Support</td> <td>Support</td> <td>Support</td> <td>Support</td> </tr> </table> </div> <div class="prenextnav-ref"> <ul> <li> Previous Page <a href="/tl/jsref/prop_nav_language.html" title="Window navigator.language Atribute">language</a></li> <li> Next Page <a href="/tl/jsref/prop_nav_platform.html" title="Window navigator.platform Atribute">platform</a></li> <li> Go Back to Previous Level <a href="/tl/jsref/obj_navigator.html" title="Window Navigator">Window Navigator</a></li> </ul> </div><div style="background-color:#fcfdf8; padding:0;"> </div> </div>  <div id="sidebar"> <div><h3><center> Toolbox </center><h3> <h5 id="tools_reference"><a href="/tl/jsref/index.html">Manwal ng Reference ng JavaScript at HTML DOM</a></h5> <h5 id="tools_example"><a href="/tl/js/js_examples.html">JavaScript Example</a></h5> <h5 id="tools_quiz"><a href="/tl/js/js_quiz.html">JavaScript Quiz</a></h5> <h5 id="tools_tutorial"><a href="/tl/js/index.html">JavaScript Tutorial</a></h5> </div> <div><h3><center> Sponsor Link </center><h3> <div id="sbtg"> <script src="/myjs/zzsr.js"></script> </div> </div> </div> <div id="footer"> <p id="p1"> Ang nilalaman na ibinibigay ng CodeW3C.com ay para sa pagsasanay at pagsusuri lamang, walang pananagutan sa katumpakan ng nilalaman. 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