在此页

• 构造函数
• 静态方法
• 实例方法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

Intl.RelativeTimeFormat object enables language-sensitive relative time formatting.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

构造函数

Intl.RelativeTimeFormat.RelativeTimeFormat()

创建新的 Intl.RelativeTimeFormat 对象。

静态方法

Intl.RelativeTimeFormat.supportedLocalesOf()

Returns an array containing those of the provided locales that are supported without having to fall back to the runtime's default locale.

实例方法

Intl.RelativeTimeFormat.prototype.format()

Formats a value 和 unit according to the locale and formatting options of the given Intl.RelativeTimeFormat 对象。

Intl.RelativeTimeFormat.prototype.formatToParts()

返回 Array of objects representing the relative time format in parts that can be used for custom locale-aware formatting.

Intl.RelativeTimeFormat.prototype.resolvedOptions()

Returns a new object with properties reflecting the locale and formatting options computed during initialization of the object.

范例

基本 format usage

The following example shows how to use a relative time formatter for the English language.

// Create a relative time formatter in your locale
// with default values explicitly passed in.
const rtf = new Intl.RelativeTimeFormat("en", {
    localeMatcher: "best fit", // other values: "lookup"
    numeric: "always", // other values: "auto"
    style: "long", // other values: "short" or "narrow"
});
// Format relative time using negative value (-1).
rtf.format(-1, "day");
// > "1 day ago"
// Format relative time using positive  value (1).
rtf.format(1, "day");
// > "in 1 day"
					

使用 formatToParts

The following example shows how to create a relative time formatter returning formatted parts

const rtf = new Intl.RelativeTimeFormat("en", { numeric: "auto" });
// Format relative time using the day unit.
rtf.formatToParts(-1, "day");
// > [{ type: "literal", value: "yesterday"}]
rtf.formatToParts(100, "day");
// > [{ type: "literal", value: "in " },
// >  { type: "integer", value: "100", unit: "day" },
// >  { type: "literal", value: " days" }]
					

规范

规范	状态	注释
ECMAScript 国际化 API (ECMA-402) The definition of 'RelativeTimeFormat' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
RelativeTimeFormat	Chrome 71	Edge 79	Firefox 65	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android 65	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 12.0.0 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() 构造函数 了解更多细节。
RelativeTimeFormat() 构造函数	Chrome 71	Edge 79	Firefox 65	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android 65	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 13.0.0 13.0.0 部分支持 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the RelativeTimeFormat instance silently falls back to en-US . To make full ICU (locale) data available for versions prior to 13, see Node.js documentation on the --with-intl option and how to provide the data.
format	Chrome 71	Edge 79	Firefox 65	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android 65	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 12.0.0 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() 构造函数 了解更多细节。
formatToParts	Chrome 71	Edge 79	Firefox 70	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android No	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 12.0.0 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() 构造函数 了解更多细节。
resolvedOptions	Chrome 71	Edge 79	Firefox 65	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android 65	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 12.0.0 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() 构造函数 了解更多细节。
supportedLocalesOf	Chrome 71	Edge 79	Firefox 65	IE No	Opera 58	Safari No	WebView Android 71	Chrome Android 71	Firefox Android 65	Opera Android 50	Safari iOS No	Samsung Internet Android 10.0	nodejs 13.0.0 13.0.0 部分支持 12.0.0 Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available for versions prior to 13, see Node.js documentation on the --with-intl option and how to provide the data.

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

另请参阅

• The Intl.RelativeTimeFormat API

元数据

• 最后修改： May 8, 2020

相关话题

1. 标准内置对象
2. Intl
3. 方法
   1. Intl.getCanonicalLocales()
4. 相关页面：
5. Collator
6. DateTimeFormat
7. ListFormat
8. NumberFormat
9. PluralRules
10. RelativeTimeFormat
11. 继承：
12. Object
13. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
14. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()