JavaScript 对象 toString() 方法

Timetable

JS Manual

JavaScript

Window

HTML DOM

Web API

HTML Muundo

</a></li> <li><a href="/sw/jsref/dom_obj_time.html" title="HTML DOM Time mwingine"><time></a></li> <li><a href="/sw/jsref/dom_obj_title.html" title="HTML DOM Title mwingine"><title></a></li> <li><a href="/sw/jsref/dom_obj_track.html" title="HTML DOM Track mwingine"><track></a></li> <li><a href="/sw/jsref/dom_obj_u.html" title="HTML DOM Underline mwingine"><u></a></li> <li><a href="/sw/jsref/dom_obj_ul.html" title="HTML DOM Ul mwingine"><ul></a></li> <li><a href="/sw/jsref/dom_obj_var.html" title="HTML DOM Variable mwingine"><var></a></li> <li><a href="/sw/jsref/dom_obj_video.html" title="HTML DOM Video mwingine"><video></a></li> </ul> <h2>其他参考手册</h2> <ul> <li><a href="/sw/jsref/obj_cssstyledeclaration.html" title="CSSStyleDeclaration mwingine">CSSStyleDeclaration</a></li> <li><a href="/sw/jsref/jsref_type_conversion.html" title="JavaScript ujenzi wa utunzi">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="/sw/howto/index.html" title="Kifaa cha CodeW3C.com">Kifaa cha CodeW3C.com</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>JavaScript 对象 toString() 方法</h1> <div class="prenextnav-ref"> <ul> <li> Kwanza <a href="/sw/jsref/jsref_object_seal.html" title="Method ya Object.seal() ya JavaScript">seal()</a></li> <li> Pya <a href="/sw/jsref/jsref_object_valueof.html" title="Method ya valueOf() ya object ya JavaScript">valueOf()</a></li> <li> Rudi kwa ukweli wa juu <a href="/sw/jsref/jsref_obj_object.html" title="Mwongozo wa object ya JavaScript">Mwongozo wa object ya JavaScript</a></li> </ul> </div> <div> <h2>定义和用法</h2> <p><code>toString()</code> 方法将对象作为字符串返回。</p> <p>如果 <code>toString()</code> 方法不能返回字符串，则返回 "[object Object]"。</p> <p><code>Object.toString()</code> 总是返回对象构造函数。</p> <p><code>toString()</code> 方法不会更改原始对象。</p> <h3>说明</h3> <p>每个 JavaScript 对象都有 <code>toString()</code> 方法。</p> <p>当需要将对象显示为文本（如在 HTML 中）或需要将对象用作字符串时，JavaScript 在内部使用 <code>toString()</code> 方法。</p> <p>通常，您不会在自己的代码中使用它。</p> </div> <div> <h2>Mfano</h2> <h3>Mfano 1</h3> <p>Kuandaa toString() kwenye kipindi:</p> <pre class="language-js"> const fruits = ["Banana", "Orange", "Apple", "Mango"]; let text = fruits.toString(); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_object_tostring_1">Jifunze kwa mwenyewe</a></p> <h3>Mfano 2</h3> <p>Kuandaa toString() kwenye kifaa:</p> <pre class="language-js"> const person = { firstName: "Bill", lastName: "Gates", age: 19, eyeColor: "blue" }; const keys = person.toString(); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_object_tostring_2">Jifunze kwa mwenyewe</a></p> <h3>Mfano 3</h3> <p>Kuandaa Object.toString() kwenye kifaa:</p> <pre class="language-js"> const person = { firstName: "Bill", lastName: "Gates", age: 19, eyeColor: "blue" }; const keys = Object.toString(person); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_object_tostring_3">Jifunze kwa mwenyewe</a></p> </div> <div> <h2>Inayotumia</h2> <pre><i>kifaa</i>.toString()</pre> <h3>Hatua</h3> <p>Hakuna hatua.</p> <h3>Matokeo</h3> <table class="dataintable"> <tr> <th style="width: 25%;">Aina</th> <th>Inaandika</th> </tr> <tr> <td>Maelezo</td> <td>Inaonyesha maelezo ya kifaa kama ni kifaa cha kawaida.</td> </tr> <tr> <td>"[object type]"</td> <td>kama iweze kuzingatia maelezo ya kifaa cha kawaida.</td> </tr> </table> </div> <div> <h2>Vifaa vya kina vya kidhamu vinapatia</h2> <p><code>toString()</code> Ni muhimu wa ECMAScript1 (ES1).</p> <p>Watazima wa wengi wa wengi wa vifaa vya kina vya kidhamu vinapatia ES1 (JavaScript 1997):</p> <table class="browser-support"> <tr> <th class="bsChrome">Chrome</th> <th class="bsEdge">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>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> </tr> </table> </div> <div> <h2>Picha za kusambaa</h2> <p><a href="/sw/js/js_objects.html" title="Object ya JavaScript">Object ya JavaScript</a></p> <p><a href="/sw/js/js_object_definition.html" title="Uainishaji wa object ya JavaScript">Uainishaji wa object ya JavaScript</a></p> <p><a href="/sw/js/js_object_methods.html" title="Method ya object ya JavaScript">Method ya object ya JavaScript</a></p> <p><a href="/sw/js/js_object_properties.html" title="Mipendo wa object ya JavaScript">Mipendo wa object ya JavaScript</a></p> </div> <div class="prenextnav-ref"> <ul> <li> Kwanza <a href="/sw/jsref/jsref_object_seal.html" title="Method ya Object.seal() ya JavaScript">seal()</a></li> <li> Pya <a href="/sw/jsref/jsref_object_valueof.html" title="Method ya valueOf() ya object ya JavaScript">valueOf()</a></li> <li> Rudi kwa ukweli wa juu <a href="/sw/jsref/jsref_obj_object.html" title="Mwongozo wa object ya JavaScript">Mwongozo wa object ya JavaScript</a></li> </ul> </div><div style="background-color:#fcfdf8; padding:0;"> </div> </div>  <div id="sidebar"> <div><h3><center> Mwafaa </center><h3> <h5 id="tools_reference"><a href="/sw/jsref/index.html">Mshakilishi wa JavaScript na HTML DOM wa Toleo</a></h5> <h5 id="tools_example"><a href="/sw/js/js_examples.html">Mifano ya JavaScript</a></h5> <h5 id="tools_quiz"><a href="/sw/js/js_quiz.html">Imitindo ya JavaScript</a></h5> <h5 id="tools_tutorial"><a href="/sw/js/index.html">Mafunzo ya JavaScript</a></h5> </div> <div><h3><center> Mwakojo wa msingi </center><h3> <div id="sbtg"> <script src="/myjs/zzsr.js"></script> </div> </div> </div> <div id="footer"> <p id="p1"> Matokeo ya CodeW3C.com inatumika kwa mafunzo na michezo, hatarishwa kweli wa matokeo. Risiki ambazo zingatumiwa kwa kusoma hii wimbo ni bila mawasiliano na wimbo hii. Ilihifadhiwa hisia zote. Kwa hisia zote zimejengwa. </p> <p id="p2"> <a href="/sw/about/index.html" title="Kuhusu CodeW3C.com">Kuhusu CodeW3C.com</a> <a href="/sw/about/about_helping.html" title="Msaada cha CodeW3C.com">Msaada cha CodeW3C.com</a> <a href="/sw/about/about_use.html" title="Kuhusu kutumia">Sharti za kutumia</a> <a href="/sw/about/about_privacy.html" title="Kuhusu hufaa">Sharti za hufaa</a> <a href="http://www.comfortsoftwaregroup.com/" target="_blank"><img src="/comfortsoftwaregroup.png"></a> <a href="http://www.ce4e.com/" target="_blank"><img src="/poweredby.png" alt="Inariki na Ce4e.com"></a> </p> </div> </div>  <script src="/myjs/tongji.js"></script> </body> </html>