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Quickstart: Sign in users in a single-page app (SPA) and call the Microsoft Graph API using JavaScript

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This quickstart uses a sample JavaScript (JS) single-page app (SPA) to show you how to sign in users by using the authorization code flow with Proof Key for Code Exchange (PKCE) and call the Microsoft Graph API. The sample uses the Microsoft Authentication Library for JavaScript to handle authentication.

Prerequisites

Register the application in the Microsoft Entra admin center

  1. Sign in to the Microsoft Entra admin center as at least an Application Developer.
  2. If you have access to multiple tenants, use the Settings icon in the top menu to switch to the tenant in which you want to register the application from the Directories + subscriptions menu.
  3. Browse to Identity > Applications > App registrations.
  4. Select New registration.
  5. When the Register an application page appears, enter a name for your application, such as identity-client-app.
  6. Under Supported account types, select Accounts in any organizational directory and personal Microsoft accounts.
  7. Select Register.
  8. The application's Overview pane displays upon successful registration. Record the Application (client) ID and Directory (tenant) ID to be used in your application source code.

Add a redirect URI

  1. Under Manage, select Authentication.
  2. Under Platform configurations, select Add a platform. In the pane that opens, select Single-page application.
  3. Set the Redirect URIs value to http://localhost:3000/.
  4. Select Configure to apply the changes.
  5. Under Platform Configurations expand Single-page application.
  6. Confirm that for Grant types Already configured, your Redirect URI is eligible for the Authorization Code Flow with PKCE.

Clone or download the sample application

To obtain the sample application, you can either clone it from GitHub or download it as a .zip file.

  • To clone the sample, open a command prompt and navigate to where you wish to create the project, and enter the following command:

    git clone https://github.com/Azure-Samples/ms-identity-javascript-tutorial

  • Download the .zip file. Extract it to a file path where the length of the name is fewer than 260 characters.

Configure the project

  1. In your IDE, open the project folder, ms-identity-javascript-tutorial, containing the sample.

  2. Open 1-Authentication/1-sign-in/App/authConfig.js and update the following values with the information recorded earlier in the admin center.

    /**
 * Configuration object to be passed to MSAL instance on creation. 
 * For a full list of MSAL.js configuration parameters, visit:
 * https://github.com/AzureAD/microsoft-authentication-library-for-js/blob/dev/lib/msal-browser/docs/configuration.md 
 */

const msalConfig = {
    auth: {
        clientId: 'Enter_the_Application_Id_Here', // This is the ONLY mandatory field that you need to supply.
        authority: 'https://login.microsoftonline.com/Enter_the_Tenant_Info_Here', // Defaults to "https://login.microsoftonline.com/common"
        redirectUri: 'Enter_the_Redirect_URI_Here/', // You must register this URI in the app registration on the Microsoft Entra admin center. Defaults to window.location.href e.g. http://localhost:3000/
        navigateToLoginRequestUrl: true, // If "true", will navigate back to the original request location before processing the auth code response.
    },
    cache: {
        cacheLocation: 'sessionStorage', // Configures cache location. "sessionStorage" is more secure, but "localStorage" gives you SSO.
        storeAuthStateInCookie: false, // set this to true if you have to support IE
    },
    system: {
        loggerOptions: {
            loggerCallback: (level, message, containsPii) => {
                if (containsPii) {
                    return;
                }
                switch (level) {
                    case msal.LogLevel.Error:
                        console.error(message);
                        return;
                    case msal.LogLevel.Info:
                        console.info(message);
                        return;
                    case msal.LogLevel.Verbose:
                        console.debug(message);
                        return;
                    case msal.LogLevel.Warning:
                        console.warn(message);
                        return;
                }
            },
        },
    },
};

/**
 * Scopes you add here will be prompted for user consent during sign-in.
 * By default, MSAL.js will add OIDC scopes (openid, profile, email) to any login request.
 * For more information about OIDC scopes, visit: 
 * https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-permissions-and-consent#openid-connect-scopes
 */
const loginRequest = {
  scopes: ["openid", "profile"],
};

/**
 * An optional silentRequest object can be used to achieve silent SSO
 * between applications by providing a "login_hint" property.
 */

// const silentRequest = {
//   scopes: ["openid", "profile"],
//   loginHint: "example@domain.net"
// };

// exporting config object for jest
if (typeof exports !== 'undefined') {
  module.exports = {
      msalConfig: msalConfig,
      loginRequest: loginRequest,
  };
}
    • clientId - The identifier of the application, also referred to as the client. Replace the text in quotes with the Application (client) ID value that was recorded earlier.
    • authority - The identifier of the tenant where the application is registered. Replace the text in quotes with the Directory (tenant) ID value that was recorded earlier.
    • redirectUri - The Redirect URI of the application. If necessary, replace the text in quotes with the redirect URI that was recorded earlier.

Run the application and sign in

Run the project with a web server by using Node.js:

  1. To start the server, run the following commands from within the project directory:

    npm install
npm start

  2. Copy the https URL that appears in the terminal, for example, https://localhost:3000, and paste it into a browser. We recommend using a private or incognito browser session.

  3. Follow the steps and enter the necessary details to sign in with your Microsoft account. You'll be requested an email address so a one time passcode can be sent to you. Enter the code when prompted.

  4. The application will request permission to maintain access to data you have given it access to, and to sign you in and read your profile. Select Accept. The following screenshot appears, indicating that you have signed in to the application and have accessed your profile details from the Microsoft Graph API.

    Screenshot of JavaScript App depicting the results of the API call.

Sign out from the application

  1. Find the Sign out button in the top right corner of the page, and select it.
  2. You'll be prompted to pick an account to sign out from. Select the account you used to sign in.

A message appears indicating that you have signed out. You can now close the browser window.

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