A simple cache buster


stars 🌟issues ⚠️updated 🛠created 🐣size 🏋️‍♀️
75Jun 21, 2021Feb 23, 2018Minified + gzip package size for @sparkbox/cachebust in KB



Straight forward asset fingerprinting "cachebuster" for production applications.

Requires Node 8.5.0 or higher.

Using cachebust


npm install @sparkbox/cachebust

The recommended way to use cachebust is to either add your input data in package.json or in a .cachebust.config file (see config).


cachebust: will create your fingerprinted assests & update fingerprinted "source file" names inside the target "template file(s)" as specified in the package.json file or the .cachebust.config file.

If you need to restore your template files, you can run: cachebust --restore


Globbing is allowed for target files. So "target": ["path/to/target/**/*.html"] is allowed.


Create a key in your package.json file at the root level, with source/target keys.

For example:

  "cachebust": {
      "source": [
      "target": [

Config File

Also you may create a config file in the root of the project directory called .cachebust.config

This will be a JSON object like the following:

"cachebust": {
    "source": [
    "target": [

Direct Input

cachebust allows you to directly specify the source and the target you'll need to pass in a comma seperated list for example:

cachebust -s path/to/source/css/style.css,path/to/source/js/script.js -t path/to/target/template.html

Note Direct input will override the config and package json cacehebust paramaters.

This will fingerprint the following files:

- path/to/source/css/style.css
- path/to/source/js/script.js

This will then update your template "target" file with the updated filenames:

- path/to/target/template.html

To restore these you'll have to again pass the target and source files:

cachebust -r -s path/to/source/css/style.css,path/to/source/js/script.js -t path/to/target/template.html

Running on production

** WARNING ** If run this without a backup, it is descructive. It will not backup your files.

Added a -n or --no-backup option to cachebust, this will no generate a manifest file. See https://github.com/sparkbox/cachebust/issues/9

In some cases this is desired, say on a build server, or in a git versioned repo, there is no reason to keep a manifest since each deploys a copy of the original is retained from the source control.

CLI Options

You can run cachebust --help for more options.

-V, --version         output the version number
-s, --source [files]  source file(s) to be fingerprinted; comma seperated file list
-t, --target [files]  target file(s), template files that need the fingerprinted asset file names; comma seperated file list
-r, --restore         copies the backup file(s) back to the original; backup file(s) are removed.
-q, --quiet',         All normal output is surpressed. Some errors will still be generated.
-n, --no-backup       Warning: this will not generate the manifest file. This is only to be used on PRODUCTION servers or under version control. This is descructive!
-h, --help            output usage information

Ensure that the file lists for -s or --source and -t and --target are comma seperated.

-s dir/path/file.ext,dir/otherpath/otherfile.ext etc.

You can pass in one file (no comma, or mutliple files for both source and target).

You may also specify a single file, without a comma.


The MIT License (MIT)

If you find any bugs or have a feature request, please open an issue on github!

The npm package download data comes from npm's download counts api and package details come from npms.io.