120 lines
3.2 KiB
Markdown
120 lines
3.2 KiB
Markdown
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[npm]: https://img.shields.io/npm/v/@rollup/plugin-replace
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[npm-url]: https://www.npmjs.com/package/@rollup/plugin-replace
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[size]: https://packagephobia.now.sh/badge?p=@rollup/plugin-replace
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[size-url]: https://packagephobia.now.sh/result?p=@rollup/plugin-replace
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[![npm][npm]][npm-url]
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[![size][size]][size-url]
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[![libera manifesto](https://img.shields.io/badge/libera-manifesto-lightgrey.svg)](https://liberamanifesto.com)
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# @rollup/plugin-replace
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🍣 A Rollup plugin which replaces strings in files while bundling.
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## Requirements
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This plugin requires an [LTS](https://github.com/nodejs/Release) Node version (v8.0.0+) and Rollup v1.20.0+.
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## Install
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Using npm:
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```console
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npm install @rollup/plugin-replace --save-dev
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```
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## Usage
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Create a `rollup.config.js` [configuration file](https://www.rollupjs.org/guide/en/#configuration-files) and import the plugin:
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```js
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import replace from '@rollup/plugin-replace';
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export default {
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input: 'src/index.js',
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output: {
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dir: 'output',
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format: 'cjs'
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},
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plugins: [replace({ __buildEnv__: 'production' })]
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};
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```
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Then call `rollup` either via the [CLI](https://www.rollupjs.org/guide/en/#command-line-reference) or the [API](https://www.rollupjs.org/guide/en/#javascript-api).
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The configuration above will replace every instance of `__buildEnv__` with `'production'` in any file included in the build. _Note: Values should always be strings. For complex values, use `JSON.stringify`._
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Typically, `@rollup/plugin-replace` should be placed in `plugins` _before_ other plugins so that they may apply optimizations, such as dead code removal.
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## Options
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In addition to the properties and values specified for replacement, users may also specify the options below.
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### `delimiters`
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Type: `Array[...String, String]`<br>
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Default: `['\b', '\b']`
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Specifies the boundaries around which strings will be replaced. By default, delimiters are [word boundaries](https://www.regular-expressions.info/wordboundaries.html). See [Word Boundaries](#word-boundaries) below for more information.
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### `exclude`
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Type: `String` | `Array[...String]`<br>
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Default: `null`
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A [minimatch pattern](https://github.com/isaacs/minimatch), or array of patterns, which specifies the files in the build the plugin should _ignore_. By default no files are ignored.
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### `include`
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Type: `String` | `Array[...String]`<br>
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Default: `null`
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A [minimatch pattern](https://github.com/isaacs/minimatch), or array of patterns, which specifies the files in the build the plugin should operate on. By default all files are targeted.
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## Word Boundaries
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By default, values will only match if they are surrounded by _word boundaries_.
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Consider the following options and build file:
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```js
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module.exports = {
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...
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plugins: [replace({ changed: 'replaced' })]
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};
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```
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```js
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// file.js
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console.log('changed');
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console.log('unchanged');
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```
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The result would be:
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```js
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// file.js
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console.log('replaced');
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console.log('unchanged');
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```
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To ignore word boundaries and replace every instance of the string, wherever it may be, specify empty strings as delimiters:
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```js
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export default {
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...
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plugins: [
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replace({
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changed: 'replaced',
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delimiters: ['', '']
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})
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]
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};
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```
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## Meta
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[CONTRIBUTING](/.github/CONTRIBUTING.md)
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[LICENSE (MIT)](/LICENSE)
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