Execute allowed npm install lifecycle scripts.

• Whitelist packages that you trust in your package.json: "allowScripts": { "packageName": "1.x.x - 2.x.x" }
• Run npm install --ignore-scripts or yarn install --ignore-scripts
• Run npx allow-scripts

Only the explicitly allowed [pre|post]install scripts will be executed.

$ npx allow-scripts [--dry-run]

Running the command will scan the list of installed dependencies (using an existing package-lock.json or npm-shrinkwrap.json or by creating one on the fly). It will then execute the scripts for allowed dependencies that have them in the following order:

• preinstall in the main package
• preinstall in dependencies
• install in dependencies
• postinstall in dependencies
• install in the main package
• postinstall in the main package
• prepublish in the main package
• prepare in the main package

  "allowScripts": {
    "fsevents": "*",        # allow install scripts in all versions
    "node-sass": false,     # ignore install scripts for all versions
    "webpack-cli": "3.x.x"  # allow all minors for v3, ignore everything else
  }

Allowed package list is configurable in package.json by adding an allowScripts property, with an object where the key is a package name and the value is one of:

• a string with a semver specifier for allowed versions
  • non-matching versions will be ignored
• true - allow all versions (equivalent to '*' semver specifier)
• false - ignore all versions

If a package has a lifecycle script, but is neither allowed nor ignored, allow-scripts will exit with an error.