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Develop Apps Script projects locally using clasp (Command Line Apps Script Projects).


To get started, try out the codelab!


🗺️ Develop Locally: clasp allows you to develop your Apps Script projects locally. That means you can check-in your code into source control, collaborate with other developers, and use your favorite tools to develop Apps Script.

🔢 Manage Deployment Versions: Create, update, and view your multiple deployments of your project.

📁 Structure Code: clasp automatically converts your flat project on script.google.com into folders. For example:

  • On script.google.com:
    • tests/slides.gs
    • tests/sheets.gs
  • locally:
    • tests/
      • slides.js
      • sheets.js

🔷 Write Apps Script in TypeScript: Write your Apps Script projects using TypeScript features:

  • Arrow functions
  • Optional structural typing
  • Classes
  • Type inference
  • Interfaces
  • And more...


First download clasp:

sudo npm i @google/clasp -g

Then enable Apps Script API: https://script.google.com/home/usersettings

(If that fails, run this:)

sudo npm i -g grpc @google/clasp --unsafe-perm



How To...


Logs the user in. Saves the client credentials to an rc file.


  • --no-localhost: Do not run a local server, manually enter code instead.
  • --ownkey: Save .clasprc.json file to current working directory.


Logs out the user by deleting client credentials.


  • clasp logout


Creates a new script project.


  • scriptTitle: An optional project title.
  • scriptParentId: An optional project parent Id. The Drive ID of a parent file that the created script project is bound to. This is usually the ID of a Google Doc, Google Sheet, Google Form, or Google Slides file. If not set, a standalone script project is created.
  • rootDir: Local directory in which clasp will store your project files. If not specified, clasp will default to the current directory.


  • clasp create
  • clasp create "My Script"
  • clasp create "My Script" "1D_Gxyv*****************************NXO7o"
  • clasp create "My Script" "1D_Gxyv*****************************NXO7o" --rootDir ./dist


Fetches a project from either a provided or saved script id. Updates local files with Apps Script project.


  • clasp pull


Force writes all local files to the script management server.


  • clasp push

Ignores files:

  • That start with a .
  • That don't have an accepted file extension
  • That are ignored (filename matches a glob pattern in the ignore file)


Lists files that will be written to the server on push.


  • clasp status

Ignores files:

  • That start with a .
  • That don't have an accepted file extension
  • That are ignored (filename matches a glob pattern in the ignore file)


Opens the clasp project on script.google.com. Provide a scriptId to open a different script.


  • scriptId: The optional script project to open.
  • webapp: open web application in a browser.


  • clasp open
  • clasp open [scriptId]
  • clasp open --webapp


List deployments of a script


  • clasp deployments


Creates a version and deploys a script. The response gives the version of the deployment.


  • version: The version number.
  • description: The deployment description.


  • clasp deploy
  • clasp deploy 4
  • clasp deploy 7 "Updates sidebar logo."


Undeploys a deployment of a script.


  • deploymentId: deploymentId The deployment ID.


  • clasp undeploy "123"


Updates deployments of a script.


  • deploymentId: deploymentId The deployment ID.
  • version: version The target deployment version.
  • description: description The reason why the script was redeployed.


  • clasp redeploy 123 3 "Why I updated the deployment"


List versions of a script.


  • clasp versions


Creates an immutable version of the script.


  • description: description The description of the script version.


  • clasp version
  • clasp version "Bump the version."


Lists your most recent 10 Apps Script projects.


  • clasp list # helloworld1 – xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ...


Prints out 5 most recent the StackDriver logs.

NOTE: It requires Project ID setup (see below).


  • json: json Output logs in json format.
  • open: open Open StackDriver logs in a browser.


clasp logs
ERROR Sat Apr 07 2018 10:58:31 GMT-0700 (PDT) myFunction      my log error
INFO  Sat Apr 07 2018 10:58:31 GMT-0700 (PDT) myFunction      info message
  • clasp logs --json: See the logs in JSON format.
  • clasp logs --open: Open the StackDriver logs in your browser.


Remotely executes an Apps Script function. This function runs your script in the cloud. You must supply the functionName params. For now, it can only run functions that do not require other authorization.

NOTE: It requires Project ID setup (see below).


  • functionName: functionName The function in the script that you want to run.


  • clasp run 'sendEmail'


Displays the help function.


  • clasp help


Get Project ID

  1. Run clasp open.
  2. Click Resources > Cloud Platform project...
  3. Copy the project ID project-id-xxxxxxxxxxxxxxxxxxx into .clasp.json. It should look like this:
  "projectId": "project-id-xxxxxxxxxxxxxxxxxxx"

Now you can run clasp logs for this project.

Ignore File (.claspignore)

Like .gitignore, .claspignore allows you to ignore files that you do not wish to not upload on clasp push. Steps:

  1. Create a file called .claspignore in your project's root directory.
  2. Add patterns to be excluded from clasp push. Note: The .claspignore file is parsed with Anymatch, which is different from .gitignore, especially for directories. To ignore a directory, use syntax like **/node_modules/**.

A sample .claspignore ignoring everything except the manifest and build/main.js:


Project Settings File (.clasp.json)

When running clone or create, a file named .clasp.json is created in the current directory to describe clasp's configuration for the current project. The following configuration values can be used in it:

scriptId (required)

Specifies the id of the Google Script project that clasp will target. It is the part located inbetween /d/ and /edit in your project's URL: https://script.google.com/d/<SCRIPT_ID>/edit.

rootDir (optional)

Specifies the local directory in which clasp will store your project files. If not specified, clasp will default to the current directory.


The library requires Node version >= 4.7.4. Use this script to check your version and upgrade Node if necessary:

node -v # Check Node version
sudo npm install n -g
sudo n latest


The Apps Script CLI uses TypeScript to provide autocompletion and linting when developing. Use an IDE like Visual Studio Code for TypeScript autocompletion.


  • Install tsc: npm install -g typescript
  • Remove your local version of clasp: sudo npm uninstall -g @google/clasp
    • This will prevent errors when updating node_modules.
  • Install dependencies: npm i

After Making a Change

sudo npm run build;
clasp <command>

(If you see build errors, run sudo npm run build-fresh)

Run Tests

sudo npm run build;
npm run test

See tests/ for more information.


  • Use npm run lint to find common style errors.
  • Download sort-imports for VSC to automatically sort imports.

Generate Docs

The core "How To" section of the docs is generated from JSDoc comments from index.ts.

Run npm run docs to build the "How To" section. Copy/paste that section into the README.md.

Publishing clasp to npm (admin)

  1. Build index.js locally. .gitignore/.npmignore will hide js/ts files appropriately.
  2. Bump version: npm version [major|minor|patch] -m "Bump version to %s"
  3. Publish with: npm run publish


The main purpose of this tool is to enable local Apps Script development. If you have a core feature or use-case you'd like to see, find a GitHub issue or create a detailed proposal of the use-case. PRs are very welcome! See the issues (especially good first issue and help wanted).

How to Submit a Pull Request

  1. Look over the test cases in tests/test.ts, try cases that the PR may affect.
  2. Run tslint: npm run lint.
  3. Submit a pull request after testing your feature to make sure it works.

⚡ Powered by the Apps Script API.