已废弃
该特性已经从 Web 标准中删除，虽然一些浏览器目前仍然支持它，但也许会在未来的某个时间停止支持，请尽量不要使用该特性。

`bold()` `方法会创建` HTML 元素 “b”，并将字符串加粗展示。

## 语法

    str.bold()

### 返回值

包含HTML元素 `<b>` 的字符串。

## 描述

`bold()` 方法将一个字符串嵌入到<b></b>标记中。

## 示例

### `使用bold()`

下面的例子使用字符串方法来改变字符串的格式。

    var worldString = 'Hello, world';

    console.log(worldString.blink());   // <blink>Hello, world</blink>
    console.log(worldString.bold());    // <b>Hello, world</b>
    console.log(worldString.italics()); // <i>Hello, world</i>
    console.log(worldString.strike());  // <strike>Hello, world</strike>

## 规范

Specification | Status | Comment
--- | --- | ---
ECMAScript 2015 (6th Edition, ECMA-262) String.prototype.bold | Standard | Initial definition. Implemented in JavaScript 1.0. Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.
ECMAScript Latest Draft (ECMA-262) String.prototype.bold | Draft | Defined in the (normative) Annex B for Additional ECMAScript Features for Web Browsers.

## 浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

- Desktop
- Mobile

Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari
--- | --- | --- | --- | --- | ---
Basic support | (Yes) | 1.0 (1.7 or earlier) | (Yes) | (Yes) | (Yes)

Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile
--- | --- | --- | --- | --- | --- | ---
Basic support | (Yes) | (Yes) | 1.0 (1.0) | (Yes) | (Yes) | (Yes)

## 相关连接

- `String.prototype.blink()`
- `String.prototype.italics()`
- `String.prototype.strike()`