---
title: String.prototype.bold()
slug: Web/JavaScript/Reference/Global_Objects/String/bold
tags:
  - Descontinuado
  - JavaScript
  - Prototipo
  - Referencia
  - String
  - metodo
translation_of: Web/JavaScript/Reference/Global_Objects/String/bold
---
<div>{{JSRef}} {{deprecated_header}}</div>

<p>O método <code><strong>bold()</strong></code> cria um elemento HTML <a href="https://wiki.developer.mozilla.org/pt-BR/docs/Web/HTML/Element/b" title="https://wiki.developer.mozilla.org/pt-BR/docs/Web/HTML/Element/b">&lt;b&gt;</a> que faz com que uma string seja exibida em negrito.</p>

<h2 id="Sintaxe">Sintaxe</h2>

<pre class="syntaxbox notranslate"><code><var>str</var>.bold()</code></pre>

<h3 id="Valor_retornado">Valor retornado</h3>

<p>Uma string contendo um elemento HTML <a href="https://wiki.developer.mozilla.org/pt-BR/docs/Web/HTML/Element/b" title="https://wiki.developer.mozilla.org/pt-BR/docs/Web/HTML/Element/b">&lt;b&gt;</a> .</p>

<h2 id="Descrição">Descrição</h2>

<p>O método <code>bold()</code> cria uma string dentro de uma tag <code>&lt;b&gt;</code>:<br>
 <code>"&lt;b&gt;str&lt;/b&gt;"</code>.</p>

<h2 id="Exemplos">Exemplos</h2>

<h3 id="Usando_bold">Usando <code>bold()</code></h3>

<p>Os exemplos abaixo usam métodos do objeto <a href="https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/String#M%C3%A9todos_gen%C3%A9ricos_de_Strings" title="https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/String#M%C3%A9todos_gen%C3%A9ricos_de_Strings">String </a>para alterar a formatação de uma string:</p>

<pre class="brush: js notranslate">var worldString = 'Olá, mundo';

console.log(worldString.blink());   // &lt;blink&gt;Olá, mundo&lt;/blink&gt;
console.log(worldString.bold());    // &lt;b&gt;Olá, mundo&lt;/b&gt;
console.log(worldString.italics()); // &lt;i&gt;Olá, mundo&lt;/i&gt;
console.log(worldString.strike());  // &lt;strike&gt;Olá, mundo&lt;/strike&gt;</pre>

<h2 id="Especificações">Especificações</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-string.prototype.bold', 'String.prototype.bold')}}</td>
  </tr>
 </tbody>
</table>

<h2 id="Navegadores_compatíveis">Navegadores compatíveis</h2>

<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>

<p>{{Compat("javascript.builtins.String.bold")}}</p>

<h2 id="Veja_também">Veja também</h2>

<ul>
 <li>{{jsxref("String.prototype.blink()")}}</li>
 <li>{{jsxref("String.prototype.italics()")}}</li>
 <li>{{jsxref("String.prototype.strike()")}}</li>
</ul>