import-cost

PRE-ALPHA

Minor mode for displaying JavaScript module sizes inline.

This is an Emacs port of the Import Cost plugin for Visual Studio Code.

Requirements

• emacs >=24.4
• node >=8.0.0

Installation

Manually

First clone this project:

$ git clone git@github.com:madeleinedaly/import-cost.git

Then add something like this to your Emacs config:

(add-to-list 'load-path "path/to/import-cost.el")
(require 'import-cost)
;; you can access config options once the package has loaded:
(with-eval-after-load 'import-cost
  (setq import-cost-bundle-size-decoration 'gzipped))

Usage

You can enable import-cost-mode for the current buffer interactively with M-x import-cost-mode.

Or hook into your preferred JavaScript modes:

(add-hook 'js2-mode-hook #'import-cost-mode)
(add-hook 'rjsx-mode-hook #'import-cost-mode)

Configuration

The following variables are customizable (see M-x customize-group import-cost):

import-cost-small-package-size : number

Upper size limit, in KB, that will count a package as a small package.

• Default: 50

import-cost-medium-package-size : number

Upper size limit, in KB, that will count a package as a medium package. Any package size above this limit will be considered large.

• Default: 100

import-cost-small-package-color : color | face

Decoration color for small packages.

• Default: "#7cc36e"

import-cost-medium-package-color : color | face

Decoration color for medium packages.

• Default: "#7cc36e"

import-cost-large-package-color : color | face

Decoration color for large packages.

• Default: "#d44e40"

import-cost-typescript-extensions : list (regexp)

File extensions to be parsed by the TypeScript parser.

• Default: '("\\.tsx?$")

import-cost-javascript-extensions : list (regexp)

File extensions to be parsed by the JavaScript parser.

• Default: '("\\.jsx?$")

import-cost-bundle-size-decoration : symbol

Which bundle size to display.

• Default: 'both

• Possible values:

  • 'both
  • 'minified
  • 'gzipped

import-cost-cache-filename : string

The name of the file in which import size decoration data gets persisted across sessions.

• Default: "import-cost.cache"

import-cost-cache-filepath : string

The path to the file where import size decoration data gets persisted across sessions.

• Default: user-emacs-directory

import-cost-lighter : string

Lighter used in the mode-line while import-cost-mode is active.

• Default: " ₵"

License

MIT