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版本:3.4.0

生命周期 API

在构建过程中,插件会被并行加载,各自获取自己的内容并将它们变成路由。 插件还可以配置 webpack 或后处理构建生成的文件。

async loadContent()

Plugins should use this lifecycle to fetch from data sources (filesystem, remote API, headless CMS, etc.) or do some server processing. 返回值是它需要的内容。

比如,下面的插件会返回 1 到 10 之间的一个随机整数作为内容。

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'docusaurus-plugin',
async loadContent() {
return 1 + Math.floor(Math.random() * 10);
},
};
}

async contentLoaded({content, actions})

The data that was loaded in loadContent will be consumed in contentLoaded. 数据可以被渲染成路由,注册为全局数据,等等。

content

contentLoaded will be called after loadContent is done. The return value of loadContent() will be passed to contentLoaded as content.

actions

actions contain three functions:

addRoute(config: RouteConfig): void

为网站新增一条路由。

export type RouteConfig = {
/**
* With leading slash. Trailing slash will be normalized by config.
*/
path: string;
/**
* Component used to render this route, a path that the bundler can `require`.
*/
component: string;
/**
* Props. Each entry should be `[propName]: pathToPropModule` (created with
* `createData`)
*/
modules?: RouteModules;
/**
* The route context will wrap the `component`. Use `useRouteContext` to
* retrieve what's declared here. Note that all custom route context declared
* here will be namespaced under {@link RouteContext.data}.
*/
context?: RouteModules;
/**
* Nested routes config, useful for "layout routes" having subroutes.
*/
routes?: RouteConfig[];
/**
* React router config option: `exact` routes would not match subroutes.
*/
exact?: boolean;
/**
* React router config option: `strict` routes are sensitive to the presence
* of a trailing slash.
*/
strict?: boolean;
/**
* Used to sort routes.
* Higher-priority routes will be matched first.
*/
priority?: number;
/**
* Optional route metadata
*/
metadata?: RouteMetadata;
/**
* Extra props; will be available on the client side.
*/
[propName: string]: unknown;
};

/**
* Plugin authors can assign extra metadata to the created routes
* It is only available on the Node.js side, and not sent to the browser
* Optional: plugin authors are encouraged but not required to provide it
*
* Some plugins might use this data to provide additional features.
* This is the case of the sitemap plugin to provide support for "lastmod".
* See also: https://github.com/facebook/docusaurus/pull/9954
*/
export type RouteMetadata = {
/**
* The source code file path that led to the creation of the current route
* In official content plugins, this is usually a Markdown or React file
* This path is expected to be relative to the site directory
*/
sourceFilePath?: string;
/**
* The last updated date of this route
* This is generally read from the Git history of the sourceFilePath
* but can also be provided through other means (usually front matter)
*
* This has notably been introduced for adding "lastmod" support to the
* sitemap plugin, see https://github.com/facebook/docusaurus/pull/9954
*/
lastUpdatedAt?: number;
};

type RouteModules = {
[module: string]: Module | RouteModules | RouteModules[];
};

type Module =
| {
path: string;
__import?: boolean;
query?: ParsedUrlQueryInput;
}
| string;

createData(name: string, data: any): Promise<string>

一个声明式的回调,用来创建静态数据(一般为 JSON 或字符串),之后可以作为 props 提供给你的路由。 接收要存储的文件名和数据,并返回数据文件的真实路径。

For example, this plugin below creates a /friends page which displays Your friends are: Yangshun, Sebastien:

website/src/components/Friends.js
import React from 'react';

export default function FriendsComponent({friends}) {
return <div>Your friends are {friends.join(',')}</div>;
}
docusaurus-friends-plugin/src/index.js
export default function friendsPlugin(context, options) {
return {
name: 'docusaurus-friends-plugin',
async contentLoaded({content, actions}) {
const {createData, addRoute} = actions;
// Create friends.json
const friends = ['Yangshun', 'Sebastien'];
const friendsJsonPath = await createData(
'friends.json',
JSON.stringify(friends),
);

// Add the '/friends' routes, and ensure it receives the friends props
addRoute({
path: '/friends',
component: '@site/src/components/Friends.js',
modules: {
// propName -> JSON file path
friends: friendsJsonPath,
},
exact: true,
});
},
};
}

setGlobalData(data: any): void

这个函数允许创建全局插件数据,在任何页面都可以被读取,包括其他插件创建的页面以及你的主题布局。

This data becomes accessible to your client-side/theme code through the useGlobalData and usePluginData hooks.

警告

Global data is... global: its size affects the loading time of all pages of your site, so try to keep it small. Prefer createData and page-specific data whenever possible.

For example, this plugin below creates a /friends page which displays Your friends are: Yangshun, Sebastien:

website/src/components/Friends.js
import React from 'react';
import {usePluginData} from '@docusaurus/useGlobalData';

export default function FriendsComponent() {
const {friends} = usePluginData('docusaurus-friends-plugin');
return <div>Your friends are {friends.join(',')}</div>;
}
docusaurus-friends-plugin/src/index.js
export default function friendsPlugin(context, options) {
return {
name: 'docusaurus-friends-plugin',
async contentLoaded({content, actions}) {
const {setGlobalData, addRoute} = actions;
// 生成全局朋友数据
setGlobalData({friends: ['Yangshun', 'Sebastien']});

// 添加 '/friends' 路径
addRoute({
path: '/friends',
component: '@site/src/components/Friends.js',
exact: true,
});
},
};
}

configureWebpack(config, isServer, utils, content)

修改内部的 webpack 配置。 If the return value is a JavaScript object, it will be merged into the final config using webpack-merge. If it is a function, it will be called and receive config as the first argument and an isServer flag as the second argument.

警告

The API of configureWebpack will be modified in the future to accept an object (configureWebpack({config, isServer, utils, content}))

config

configureWebpack is called with config generated according to client/server build. 你可以把它当作是会被和你的配置合并的基本配置。

isServer

configureWebpack will be called both in server build and in client build. The server build receives true and the client build receives false as isServer.

utils

configureWebpack also receives an util object:

  • getStyleLoaders(isServer: boolean, cssOptions: {[key: string]: any}): Loader[]
  • getJSLoader(isServer: boolean, cacheOptions?: {}): Loader | null

你可以用它们来条件性地返回你的 webpack 配置。

For example, this plugin below modify the webpack config to transpile .foo files.

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'custom-docusaurus-plugin',
configureWebpack(config, isServer, utils) {
const {getJSLoader} = utils;
return {
module: {
rules: [
{
test: /\.foo$/,
use: [getJSLoader(isServer), 'my-custom-webpack-loader'],
},
],
},
};
},
};
}

content

configureWebpack will be called both with the content loaded by the plugin.

Merge strategy

We merge the Webpack configuration parts of plugins into the global Webpack config using webpack-merge.

插件可以声明合并策略。 比如,如果你希望某条 Webpack 规则被放到前面而不是后面:

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'custom-docusaurus-plugin',
configureWebpack(config, isServer, utils) {
return {
mergeStrategy: {'module.rules': 'prepend'},
module: {rules: [myRuleToPrepend]},
};
},
};
}

Read the webpack-merge strategy doc for more details.

Configuring dev server

The dev server can be configured through returning a devServer field.

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'custom-docusaurus-plugin',
configureWebpack(config, isServer, utils) {
return {
devServer: {
open: '/docs', // Opens localhost:3000/docs instead of localhost:3000/
},
};
},
};
}

configurePostCss(options)

Modifies postcssOptions of postcss-loader during the generation of the client bundle.

Should return the mutated postcssOptions.

By default, postcssOptions looks like this:

const postcssOptions = {
ident: 'postcss',
plugins: [require('autoprefixer')],
};

示例:

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'docusaurus-plugin',
configurePostCss(postcssOptions) {
// Appends new PostCSS plugin.
postcssOptions.plugins.push(require('postcss-import'));
return postcssOptions;
},
};
}

postBuild(props)

在生产构建完成时被调用。

interface Props {
siteDir: string;
generatedFilesDir: string;
siteConfig: DocusaurusConfig;
outDir: string;
baseUrl: string;
headTags: string;
preBodyTags: string;
postBodyTags: string;
routesPaths: string[];
plugins: Plugin<any>[];
content: Content;
}

示例:

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'docusaurus-plugin',
async postBuild({siteConfig = {}, routesPaths = [], outDir}) {
// Print out to console all the rendered routes.
routesPaths.map((route) => {
console.log(route);
});
},
};
}

injectHtmlTags({content})

在 Docusaurus 生成的 HTML 中注入 head 或 body HTML 标签。

injectHtmlTags will be called both with the content loaded by the plugin.

function injectHtmlTags(): {
headTags?: HtmlTags;
preBodyTags?: HtmlTags;
postBodyTags?: HtmlTags;
};

type HtmlTags = string | HtmlTagObject | (string | HtmlTagObject)[];

type HtmlTagObject = {
/**
* Attributes of the HTML tag
* E.g. `{'disabled': true, 'value': 'demo', 'rel': 'preconnect'}`
*/
attributes?: {
[attributeName: string]: string | boolean;
};
/**
* The tag name e.g. `div`, `script`, `link`, `meta`
*/
tagName: string;
/**
* The inner HTML
*/
innerHTML?: string;
};

示例:

docusaurus-plugin/src/index.js
export default function (context, options) {
return {
name: 'docusaurus-plugin',
loadContent: async () => {
return {remoteHeadTags: await fetchHeadTagsFromAPI()};
},
injectHtmlTags({content}) {
return {
headTags: [
{
tagName: 'link',
attributes: {
rel: 'preconnect',
href: 'https://www.github.com',
},
},
...content.remoteHeadTags,
],
preBodyTags: [
{
tagName: 'script',
attributes: {
charset: 'utf-8',
src: '/noflash.js',
},
},
],
postBodyTags: [`<div> This is post body </div>`],
};
},
};
}

Tags will be added as follows:

  • headTags will be inserted before the closing </head> tag after scripts added by config.
  • preBodyTags will be inserted after the opening <body> tag before any child elements.
  • postBodyTags will be inserted before the closing </body> tag after all child elements.

getClientModules()

Returns an array of paths to the client modules that are to be imported into the client bundle.

As an example, to make your theme load a customCss or customJs file path from options passed in by the user:

my-theme/src/index.js
export default function (context, options) {
const {customCss, customJs} = options || {};
return {
name: 'name-of-my-theme',
getClientModules() {
return [customCss, customJs];
},
};
}