Google Apps Script quickstart

Create a Google Apps Script that makes requests to the Google Calendar API.

Quickstarts explain how to set up and run an app that calls a Google Workspace API. This quickstart uses a simplified authentication approach that is appropriate for a testing environment. For a production environment, we recommend learning about authentication and authorization before choosing the access credentials that are appropriate for your app.

In Apps Script, Google Workspace quickstarts use Advanced Google services to call Google Workspace APIs and handle some details of the authentication and authorization flow.

Objectives

  • Configure the environment.
  • Create and configure the script.
  • Run the script.

Prerequisites

  • A Google account with Google Calendar enabled.

  • Access to Google Drive

Create the script

  1. Create a new script by going to script.google.com/create.
  2. Replace the contents of the script editor with the following code:

calendar/quickstart/quickstart.gs
/**
 * Lists 10 upcoming events in the user's calendar.
 * @see https://developers.google.com/calendar/api/v3/reference/events/list
 */
function listUpcomingEvents() {
  const calendarId = 'primary';
  // Add query parameters in optionalArgs
  const optionalArgs = {
    timeMin: (new Date()).toISOString(),
    showDeleted: false,
    singleEvents: true,
    maxResults: 10,
    orderBy: 'startTime'
    // use other optional query parameter here as needed.
  };
  try {
    // call Events.list method to list the calendar events using calendarId optional query parameter
    const response = Calendar.Events.list(calendarId, optionalArgs);
    const events = response.items;
    if (events.length === 0) {
      console.log('No upcoming events found');
      return;
    }
    // Print the calendar events
    for (const event of events) {
      let when = event.start.dateTime;
      if (!when) {
        when = event.start.date;
      }
      console.log('%s (%s)', event.summary, when);
    }
  } catch (err) {
    // TODO (developer) - Handle exception from Calendar API
    console.log('Failed with error %s', err.message);
  }
}

  1. Click Save .
  2. Click Untitled project, type Quickstart, and click Rename.

Configure the script

Enable the Google Calendar API

Open the Apps Script project.

  1. Click Editor .
  2. Next to Services, click Add a service .
  3. Select Calendar API and click Add.

Run the sample

In the Apps Script editor, click Run.

The first time you run the sample, it prompts you to authorize access:

  1. Click Review permissions.
  2. Choose an account.
  3. Click Allow.

The script's execution log appears at the bottom of the window.

Next steps