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lessc-watch

v1.2.0

Published

Watch for file changes and compile less files into a single css bundle file.

Downloads

264

Readme

lessc-watch

npm version install size npm downloads

Watch for file changes and compile less files into a single css bundle file.

Getting started

# Install `lessc-watch` as a dev dependency locally.
npm i lessc-watch --save-dev

# Watch the `src` directory and build `src/index.less`
# (and all its dependencies) to `dist/bundle.less`.
# Set the `rewrite-urls` option of less to `all`.
npx lessc-watch src/index.less dist/bundle.css -ru=all -d=src

# Build `src/index.less` to `dist/bundle.css` and exit without watching.
npx lessc-watch src/index.less dist/bundle.css -ru=all --build

# Using config file
npx lessc-watch -f ./config.json
# or
npx lessc-watch --config ./config.json

Command options

COMMAND
  lessc-watch <entry_file> <output_file> [options ...]

EXAMPLE
  lessc-watch src/index.less dist/bundle.css -d=src -ru=all
  lessc-watch -f ./config.json
  lessc-watch --config ./config.json

OPTIONS
  --watch-dir, -d      The directory to watch (default to "./").

  --rewrite-urls, -ru  The option of less "rewrite-urls".

  --global-vars        Set less global variables (separated by comma).
                       Example 1: --global-vars=prefix=my-ui
                       Example 2: --global-vars=color1=red,color2=blue

  --config, -f         Specify the path of the config file.
                       Please note that the path of the file or directory
                       in the config file is relative to the path of the
                       config file.

  --ext                The extra file extensions to watch (separated
                       by comma). The base extensions are .less, .css,
                       .svg, .png, .jpg, .jpeg, .gif, .webp and .bmp.
                       You can use this option to add more.

  --build              Build less to css without watching for the
                       file changes.

  --delay              The milliseconds to delay before building
                       (default to 0).

  --quiet, -q          Disable all logs (not including error message).

  --help, -h           Print this message.

Programmatic usage

const { resolve } = path
const { watch } = require('lessc-watch')

watch({
  entry: resolve(__dirname, './src/index.less'),
  output: resolve(__dirname, './dist/bundle.css'),
  watchDir: resolve(__dirname, './src'),
  lessOptions: {
    rewriteUrls: 'all',
    globalVars: {
      prefix: 'myui'
    }
  }
})

The options to watch(options: LesscWatchOptions) method is:

interface LesscWatchOptions {
  entry: string
  output: string
  watchDir?: string
  extraWatchExtensions?: string[]
  delay?: number
  quiet?: boolean
  build?: boolean
  lessOptions?: LessOptions
  watchOptions?: WatchOptions
}

Example config.json

{
  "entry": "./src/index.less",
  "output": "./dist/bundle.css",
  "watchDir": "./src",
  "lessOptions": {
    "rewriteUrls": "all",
    "globalVars": {
      "prefix": "myui"
    }
  }
}

Please note that the path of the file or directory in the config file is relative to the path of the config file.

Feedback

Any feedback is welcome. Please feel free to file an issue.

License

MIT