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6
7# Lock
8
9[Auth0](https://auth0.com) is an authentication broker that supports both social and enterprise identity providers, including Active Directory, LDAP, Google Apps, and Salesforce.
10
11## Table of Contents
121. [Install](#install)
132. [Cross Origin Authentication](#cross-origin-authentication)
143. [API](#api)
154. [Browser Compatibility](#browser-compatibility)
165. [Issue Reporting](#issue-reporting)
176. [Author](#author)
187. [License](#license)
19
20## Install
21
22From CDN
23
24```html
25<!-- Latest patch release (recommended for production) -->
26<script src="https://cdn.auth0.com/js/lock/11.17.1/lock.min.js"></script>
27```
28
29From [npm](https://npmjs.org)
30
31```sh
32npm install auth0-lock
33```
34
35Then you can import `Auth0Lock` or `Auth0LockPasswordless` like this:
36
37```js
38import Auth0Lock from 'auth0-lock';
39import { Auth0Lock } from 'auth0-lock';
40import { Auth0LockPasswordless } from 'auth0-lock';
41```
42
43After installing the `auth0-lock` module, you'll need to bundle it up along with all of its dependencies. See examples for [browserify](examples/bundling/browserify/) and [webpack](examples/bundling/webpack/).
44
45> It is expected that you use the development mode when working on your app, and the production mode when deploying your app to the users.
46> You can find instructions for building your app for production with different module bundlers [here](https://reactjs.org/docs/optimizing-performance.html#use-the-production-build).
47
48If you are targeting mobile audiences, we recommended that you add:
49
50```html
51<meta name="viewport" content="width=device-width, initial-scale=1"/>
52```
53## Cross-Origin Authentication
54
55Lock uses **Cross-Origin Authentication**, make sure you understand the considerations you need to take into account by reading the [Cross-Origin Authentication documentation](https://auth0.com/docs/cross-origin-authentication).
56
57## API
58
59### new Auth0Lock(clientID, domain, options)
60
61Initializes a new instance of `Auth0Lock` configured with your application `clientID` and your account's `domain` at [Auth0](https://manage.auth0.com/). You can find this information in your [application settings](https://manage.auth0.com/#/applications).
62
63- **clientId {String}**: Your application _clientId_ in Auth0.
64- **domain {String}**: Your Auth0 _domain_. Usually _your-account.auth0.com_.
65- **options {Object}**: Allows you to customize the dialog's appearance and behavior. See [below](#customization) for the details.
66
67#### Example
68
69```js
70var clientId = "YOUR_AUTH0_APP_CLIENTID";
71var domain = "YOUR_DOMAIN_AT.auth0.com";
72var lock = new Auth0Lock(clientId, domain);
73
74lock.on("authenticated", function(authResult) {
75 lock.getUserInfo(authResult.accessToken, function(error, profile) {
76 if (error) {
77 // Handle error
78 return;
79 }
80
81 localStorage.setItem("accessToken", authResult.accessToken);
82 localStorage.setItem("profile", JSON.stringify(profile));
83
84 // Update DOM
85 });
86});
87```
88
89### new Auth0LockPasswordless(clientID, domain, options)
90
91Initializes a new instance of `Auth0LockPasswordless` configured with your application `clientID` and your account's `domain` at [Auth0](https://manage.auth0.com/). You can find this information in your [application settings](https://manage.auth0.com/#/applications).
92
93- **clientId {String}**: Your application _clientId_ in Auth0.
94- **domain {String}**: Your Auth0 _domain_. Usually _your-account.auth0.com_.
95- **options {Object}**: Allows you to customize the dialog's appearance and behavior. See [below](#customization) for the details.
96
97If both SMS and email passwordless connections are enabled [in the dashboard](https://manage.auth0.com/#/connections/passwordless), Lock will pick email by default. If you want to conditionally pick email or SMS, use the [`allowedConnections`](#ui-options) option, for example: `allowedConnections: ['sms']`.
98
99For more information, read our [passwordless docs](https://auth0.com/docs/connections/passwordless).
100
101#### Example
102
103```js
104var clientId = "YOUR_AUTH0_APP_CLIENTID";
105var domain = "YOUR_DOMAIN_AT.auth0.com";
106var lock = new Auth0LockPasswordless(clientId, domain);
107
108lock.on("authenticated", function(authResult) {
109 lock.getUserInfo(authResult.accessToken, function(error, profile) {
110 if (error) {
111 // Handle error
112 return;
113 }
114
115 localStorage.setItem("accessToken", authResult.accessToken);
116 localStorage.setItem("profile", JSON.stringify(profile));
117
118 // Update DOM
119 });
120});
121```
122
123### getUserInfo(accessToken, callback)
124
125Once the user has logged in and you are in possession of an access token, you can obtain the profile with `getUserInfo`.
126
127- **accessToken {String}**: User access token.
128- **callback {Function}**: Will be invoked after the user profile has been retrieved.
129
130#### Example
131
132```js
133lock.getUserInfo(accessToken, function(error, profile) {
134 if (!error) {
135 alert("hello " + profile.name);
136 }
137});
138```
139
140### on(event, callback)
141
142Lock will emit events during its lifecycle.
143
144- `show`: emitted when Lock is shown. Has no arguments.
145- `hide`: emitted when Lock is hidden. Has no arguments.
146- `unrecoverable_error`: emitted when there is an unrecoverable error, for instance when no connection is available. Has the error as the only argument.
147- `authenticated`: emitted after a successful authentication. Has the authentication result as the only argument.
148- `authorization_error`: emitted when authorization fails. Has the error as the only argument.
149- `hash_parsed`: every time a new Auth0Lock object is initialized in redirect mode (the default), it will attempt to parse the hash part of the URL looking for the result of a login attempt. This is a _low-level_ event for advanced use cases and _authenticated_ and _authorization_error_ should be preferred when possible. After that, this event will be emitted with `null` if it couldn't find anything in the hash. It will be emitted with the same argument as the `authenticated` event after a successful login or with the same argument as `authorization_error` if something went wrong. This event won't be emitted in popup mode because there is no need to parse the URL's hash part.
150- `forgot_password ready`: emitted when the "Forgot password" screen is shown.
151- `forgot_password submit`: emitted when the user clicks on the submit button of the "Forgot password" screen.
152- `signin submit`: emitted when the user clicks on the submit button of the "Login" screen.
153- `signup submit`: emitted when the user clicks on the submit button of the "Sign up" screen.
154- `signup error`: emitted when signup fails. Has the error as an argument.
155- `federated login`: emitted when the user clicks on a social connection button. Has the connection name and the strategy as arguments.
156
157### show(options)
158
159Displays the widget, allowing you to override some options.
160
161- **options {Object}**: Allows you to customize some aspect of the dialog's appearance and behavior. The options allowed in here are a subset of the options allowed in the constructor and will override them: `allowedConnections`, `auth.params`, `allowLogin`, `allowSignUp`, `allowForgotPassword`, `initialScreen`, `rememberLastLogin`, `flashMessage` and `languageDictionary`. See [below](#customization) for the details. Keep in mind that `auth.params` will be fully replaced and not merged.
162
163#### Example
164
165```js
166// without options
167lock.show();
168
169// will override the allowedConnections option passed to the constructor, if any
170lock.show({allowedConnections: ["twitter", "facebook"]})
171
172// will override the entire auth.params object passed to the constructor, if any
173lock.show({auth: {params: {state: 'auth_state'}}})
174```
175
176### resumeAuth(hash, callback)
177
178If you set the [auth.autoParseHash](#authentication-options) option to `false`, you'll need to call this method to complete the authentication flow. This method is useful when you're using a client-side router that uses a `#` to handle URLs (angular2 with `useHash` or react-router with `hashHistory`).
179- **hash {String}**: The hash fragment received from the redirect.
180- **callback {Function}**: Will be invoked after the parse is done. Has an error (if any) as the first argument and the authentication result as the second one. If there is no hash available, both arguments will be `null`.
181
182#### Example
183
184```js
185lock.resumeAuth(hash, function(error, authResult) {
186 if (error) {
187 alert("Could not parse hash");
188 }
189 console.log(authResult.accessToken);
190});
191```
192
193### logout(options)
194
195Logs out the user.
196
197- **options {Object}**: This is optional and follows the same rules as [this](https://auth0.com/docs/libraries/auth0js#logout).
198
199#### Example
200
201```js
202lock.logout({ returnTo: 'https://myapp.com/bye-bye' });
203```
204
205### checkSession(params, callback)
206
207The checkSession method allows you to acquire a new token from Auth0 for a user who is already authenticated against the universal login page for your domain. The method accepts any valid OAuth2 parameters that would normally be sent to authorize. In order to use this method, you have to enable Web Origins for your application. For more information, see [Using checkSession to acquire new tokens](https://auth0.com/docs/libraries/auth0js#using-checksession-to-acquire-new-tokens).
208- **params {Object}**: OAuth2 params object to send to Auth0's servers.
209- **callback {Function}**: Will be invoked after the response from the server is returned. Has an error (if any) as the first argument and the authentication result as the second one.
210
211#### Example
212
213```js
214lock.checkSession({}, function (error, authResult) {
215 if (error || !authResult) {
216 lock.show();
217 } else {
218 // user has an active session, so we can use the accessToken directly.
219 lock.getUserInfo(authResult.accessToken, function (error, profile) {
220 console.log(error, profile);
221 });
222 }
223});
224```
225
226### Customization
227
228The appearance of the widget and the mechanics of authentication can be customized with an `options` object which has one or more of the following properties. Each method that opens the dialog can take an `options` object as its first argument.
229
230#### UI options
231
232- **allowedConnections {Array}**: List of connection that will be available to perform the authentication. It defaults to all enabled connections.
233- **autoclose {Boolean}**: Determines whether or not the Lock will be closed automatically after a successful sign in. If the Lock is not `closable` it won't be closed even if this option is set to `true`. Defaults to `false`.
234- **autofocus {Boolean}**: Determines whether or not the first input on the screen, that is the email or phone number input, should have focus when the Lock is displayed. Defaults to `false` when a `container` option is provided or the Lock is being rendered on a mobile device. Otherwise, it defaults to `true`.
235- **avatar {Object}**: Determines whether or not an avatar and a username should be displayed on the Lock's header once an email or username has been entered and how to obtain it. By default avatars are fetched from [Gravatar](https://gravatar.com/). Supplying `null` will disable the functionality. To fetch avatar from other provider see [below](#avatar-provider).
236- **container {String}**: The `id` of the HTML element where the Lock will be rendered. This makes the Lock appear inline instead of in a modal window.
237- **language {String}**: Specifies the language of the widget. Defaults to `"en"`. Supported languages are:
238 - `de`: German
239 - `en`: English
240 - `es`: Spanish
241 - `it`: Italian
242 - `nb`: Norwegian bokmål
243 - `pt-BR`: Brazilian Portuguese
244 - `ru`: Russian
245 - `zh`: Chinese
246 - `ja`: Japanese
247 - [Check all the available languages](https://github.com/auth0/lock/tree/master/src/i18n)
248- **languageDictionary {Object}**: Allows you to customize every piece of text displayed in the Lock. Defaults to `{}`. See below [Language Dictionary Specification](#language-dictionary-specification) for the details.
249- **closable {Boolean}**: Determines whether or not the Lock can be closed. When a `container` option is provided its value is always `false`, otherwise it defaults to `true`.
250- **popupOptions {Object}**: Allows you to customize the location of the popup in the screen. Any [position and size feature](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#Position_and_size_features) allowed by `window.open` is accepted. Defaults to `{}`.
251- **rememberLastLogin {Boolean}**: Determines whether or not to show a screen that allows you to quickly log in with the account you used the last time when the `initialScreen` option is set to `"login"` (the default). Defaults to `true`.
252- **flashMessage {Object}**: Shows an `error` or `success` flash message when Lock is shown.
253 + **type {String}**: The message type, it should be `error` or `success`.
254 + **text {String}**: The text to show.
255- **allowAutocomplete {Boolean}**: Determines whether or not the email or username inputs will allow autocomplete (`<input autocomplete />`). Defaults to `false`.
256- **scrollGlobalMessagesIntoView {Boolean}**: Determines whether or not a globalMessage should be scrolled into the user's viewport. Defaults to `true`.
257- **allowShowPassword {Boolean}**: Determines whether or not add a checkbox to show the password when typing it. Defaults to `false`.
258- **allowPasswordAutocomplete {Boolean}**: Determines whether the password field will allow autocomplete; setting this to `true` is required for password manager support and to avoid many cases of adverse behavior. Defaults to `false`.
259
260
261#### Theming options
262
263Theme options are grouped in the `theme` property of the `options` object.
264
265```js
266var options = {
267 theme: {
268 labeledSubmitButton: false,
269 logo: "https://example.com/assets/logo.png",
270 primaryColor: "green",
271 authButtons: {
272 connectionName: {
273 displayName: "...",
274 primaryColor: "...",
275 foregroundColor: "...",
276 icon: "https://.../logo.png"
277 }
278 }
279 }
280};
281```
282
283- **labeledSubmitButton {Boolean}**: Indicates whether or not the submit button should have a label. Defaults to `true`. When set to `false` an icon will be shown. The labels can be customized through the `languageDictionary`.
284- **logo {String}**: Url for an image that will be placed in the Lock's header. Defaults to Auth0's logo.
285- **primaryColor {String}**: Defines the primary color of the Lock, all colors used in the widget will be calculated from it. This option is useful when providing a custom `logo` to ensure all colors go well together with the logo's color palette. Defaults to `"#ea5323"`.
286- **authButtons {Object}**: Allows the customization of the custom oauth2 login buttons.
287 + **displayName {String}**: The name to show instead of the connection name.
288 + **primaryColor {String}**: The button's background color. Defaults to `"#eb5424"`.
289 + **foregroundColor {String}**: The button's text color. Defaults to `"#FFFFFF"`.
290 + **icon {String}**: The icon's url for the connection. For example:`"https://site.com/logo.png"`.
291
292#### Authentication options
293
294Authentication options are grouped in the `auth` property of the `options` object. The default scope used by Lock is `openid profile email`.
295
296```js
297var options = {
298 auth: {
299 params: {
300 param1: "value1",
301 scope: "openid profile email"
302 },
303 autoParseHash: true,
304 redirect: true,
305 redirectUrl: "some url",
306 responseMode: "form_post",
307 responseType: "token",
308 sso: true,
309 connectionScopes: {
310 connectionName: [ 'scope1', 'scope2' ]
311 }
312 }
313};
314```
315
316- **params {Object}**: Specifies extra parameters that will be sent when starting a login. Defaults to `{}`.
317- **autoParseHash {Boolean}**: When set to `true`, Lock will parse the `window.location.hash` string when instantiated. If set to `false`, you'll have to manually resume authentication using the [resumeAuth](#resumeauthhash-callback) method.
318- **redirect {Boolean}**: When set to `true`, the default, _redirect mode_ will be used. Otherwise, _popup mode_ is chosen. See [below](#popup-mode) for more details.
319- **redirectUrl {String}**: The URL Auth0 will redirect back to after authentication. Defaults to the empty string `""` (no redirect URL).
320- **responseMode {String}**: Should be set to `"form_post"` if you want the code or the token to be transmitted via an HTTP POST request to the `redirectUrl` instead of being included in its query or fragment parts. Otherwise, it should be omitted.
321- **responseType {String}**: Should be set to `"token"` for Single Page Applications, and `"code"` otherwise. Also, `"id_token"` is supported for the first case. Defaults to `"code"` when `redirectUrl` is provided, and to `"token"` otherwise.
322- **sso {Boolean}**: Determines whether Single Sign-On is enabled or not in **Lock**. The Auth0 SSO session will be created regardless of this option if SSO is enabled for your application or tenant.
323- **connectionScopes {Object}**: Allows you to set scopes to be sent to the oauth2/social connection for authentication.
324
325#### Database options
326
327- **additionalSignUpFields {Array}**: Allows you to provide extra input fields during sign up. See [below](#additional-sign-up-fields) more for details. Defaults to `[]`.
328- **allowLogin {Boolean}**: When set to `false` the widget won't display the _login screen_. This is useful if you want to use the widget just for signups (the _login and sign up tabs_ in the _sign up screen_ will be hidden) or to reset passwords (the _back button_ in the _forgot password screen_ will be hidden). In such cases you may also need to specify the `initialScreen`, `allowForgotPassword` and `allowSignUp` options. It defaults to `true`.
329- **allowForgotPassword {Boolean}**: When set to `false` hides the _"Don't remember your password?"_ link in the _login screen_, making the _forgot password screen_ unreachable. Defaults to `true`. Keep in mind that if you are using a database connection with a _custom database_ which doesn't have a _change password script_ the forgot password screen won't be available.
330- **allowSignUp {Boolean}**: When set to `false` hides the _login and sign up tabs_ in the _login screen_, making the _sign up screen_ unreachable. Defaults to `true`. Keep in mind that if the database connection has sign ups _disabled_ or you are using a _custom database_ which doesn't have a _create script_, then the sign up screen won't be available.
331- **defaultDatabaseConnection {String}**: Specifies the database connection that will be used when there is more than one available.
332- **initialScreen {String}**: Name of the screen that will be shown when the widget is opened. Valid values are `"login"`, `"signUp"`, and `"forgotPassword"`. If this option is left unspecified, the widget will pick the first screen that is available from the previous list. If you set `initialScreen` to `"forgotPassword"` we recommend that you set `allowLogin` to `"false"`, otherwise a back button will be shown in the forgot password screen and it might not be clear to the user where that back button will take them.
333- **loginAfterSignUp {Boolean}**: Determines whether or not the user will be automatically signed in after a successful sign up. Defaults to `true`.
334- **forgotPasswordLink {String}**: URL for a page that allows the user to reset her password. When set to a non-empty string, the user will be linked to the provided URL when clicking the _"Don't remember your password?"_ link in the _login screen_.
335- **showTerms {Boolean}**: When set to `true` displays the `languageDictionary.signUpTerms` string. Defaults to `true`.
336- **mustAcceptTerms {Boolean}**: When set to `true` displays a checkbox input along with the terms and conditions that must be checked before signing up. The terms and conditions can be specified via the `languageDictionary` option, see the example below. Defaults to `false`.
337- **prefill {Object}**: Allows you to set the initial value for the _email_ and/or _username_ inputs, e.g. `{prefill: {email: "someone@auth0.com", username: "someone"}}`. When omitted no initial value will be provided.
338- **signUpLink {String}**: URL for a page that allows the user to sign up. When set to a non-empty string, the user will be linked to the provided URL when clicking the _sign up_ tab in the _login screen_.
339- **usernameStyle {String}**: Determines what will be used to identify the user for a Database connection that has the `requires_username` flag set, otherwise it will be ignored. Possible values are `"username"` and `"email"` and by default both `username` and `email` are allowed.
340
341#### Enterprise options
342
343- **defaultEnterpriseConnection {String}**: Specifies the enterprise connection which allows you to log in using a username and a password that will be used when there is more than one available or there is a database connection. If a `defaultDatabaseConnection` is provided the database connection will be used and this option will be ignored.
344
345#### Example
346
347```js
348var options = {
349 container: "myContainer",
350 closable: false,
351 languageDictionary: {
352 signUpTerms: "I agree to the <a href='/terms' target='_new'>terms of service</a> and <a href='/privacy' target='_new'>privacy policy</a>.",
353 title: "My Company",
354 },
355 autofocus: false
356};
357```
358
359#### Passwordless options
360
361- **passwordlessMethod {String}**: When using `Auth0LockPasswordless` with an email connection, you can use this option to pick between sending a [code](https://auth0.com/docs/connections/passwordless/spa-email-code) or a [magic link](https://auth0.com/docs/connections/passwordless/spa-email-link) to authenticate the user. Available values for email connections are `code` and `link`. Defaults to `code`. SMS passwordless connections will always use `code`.
362
363#### Other options
364
365- **configurationBaseUrl {String}**: Overrides application settings base URL. By default it uses Auth0's CDN URL when the `domain` has the format `*.auth0.com`. Otherwise, it uses the provided `domain`.
366- **languageBaseUrl {String}**: Overrides the language source URL for Auth0's provided translations. By default it uses to Auth0's CDN URL `https://cdn.auth0.com`.
367- **hashCleanup {Boolean}**: When enabled, it will remove the hash part of the callback URL after the user authentication. Defaults to `true`.
368- **connectionResolver {Function}**: When in use, provides an extensibility point to make it possible to choose which connection to use based on the username information. Has `username`, `context`, and `callback` as parameters. The callback expects an object like: `{type: 'database', name: 'connection name'}`. **This only works for database connections.** Keep in mind that this resolver will run in the form's `onSubmit` event, so keep it simple and fast. **This is a beta feature. If you find a bug, please open a GitHub [issue](https://github.com/auth0/lock/issues/new).**
369
370```js
371var options = {
372 connectionResolver: function (username, context, cb) {
373 var domain = username.includes('@') && username.split('@')[1];
374 if (domain) {
375 // If the username is test@auth0.com, the connection used will be the `auth0.com` connection.
376 // Make sure you have a database connection with the name `auth0.com`.
377 cb({ type: 'database', name: domain });
378 } else {
379 // Use the default approach to figure it out the connection
380 cb(null);
381 }
382 }
383}
384```
385
386#### Language Dictionary Specification
387
388A language dictionary is an object that allows you to customize every piece of text the Lock needs to display. For instance, the following code will change the title displayed in the header and the placeholder for the email field.
389
390```js
391var options = {
392 languageDictionary: {
393 emailInputPlaceholder: "Please enter your email",
394 title: "My Company"
395 },
396};
397```
398
399#### Additional sign up fields
400
401Extra input fields can be added to the sign up screen with the `additionalSignUpFields` option. Every input must have a `name` and a `placeholder`, and an `icon` URL can also be provided. Also, the initial value can be provided with the `prefill` option, which can be a **string** with the value or a **function** that obtains it. Other options depend on the type of the field, which is defined via the `type` option and defaults to `"text"`.
402
403Additional sign up fields are rendered below the default fields in the order they are provided.
404
405##### Text field
406
407A `validator` function can also be provided.
408
409```js
410var options = {
411 additionalSignUpFields: [{
412 name: "address",
413 placeholder: "enter your address",
414 // The following properties are optional
415 ariaLabel: "Address",
416 icon: "https://example.com/assests/address_icon.png",
417 prefill: "street 123",
418 validator: function(address) {
419 return {
420 valid: address.length >= 10,
421 hint: "Must have 10 or more chars" // optional
422 };
423 }
424 }]
425};
426```
427
428If you don't provide a `validator` function a default validator is applied, which requires the text field to contain some value (be non-empty). You can make a field optional by using a validator that always return `true`:
429
430```js
431var options = {
432 additionalSignUpFields: [{
433 name: "address",
434 placeholder: "enter your address (optional)",
435 validator: function() {return true;}
436 }]
437};
438```
439
440If you want to save the value of the attribute in the root of your profile, use `storage: 'root'`. Only a subset of values can be stored this way. The list of attributes that can be added to your root profile is [here](https://auth0.com/docs/api/management/v2#!/Users/patch_users_by_id). By default, every additional sign up field is stored inside the `user_metadata` object.
441
442```js
443var options = {
444 additionalSignUpFields: [{
445 name: "name",
446 storage: "root"
447 }]
448};
449```
450
451##### Select field
452
453To specify a select field `type: "select"` needs to be provided along with the `options` property.
454
455```js
456var options = {
457 additionalSignUpFields: [{
458 type: "select",
459 name: "location",
460 placeholder: "choose your location",
461 options: [
462 {value: "us", label: "United States"},
463 {value: "fr", label: "France"},
464 {value: "ar", label: "Argentina"}
465 ],
466 // The following properties are optional
467 ariaLabel: "Location",
468 icon: "https://example.com/assests/location_icon.png",
469 prefill: "us"
470 }]
471}
472```
473
474The `options` and the `prefill` value can be provided through a function.
475
476```js
477var options = {
478 additionalSignUpFields: [{
479 type: "select",
480 name: "location",
481 placeholder: "choose your location",
482 options: function(cb) {
483 // obtain options, in case of error you call cb with the error in the
484 // first arg instead of null
485 cb(null, options);
486 },
487 ariaLabel: "Location",
488 icon: "https://example.com/assests/location_icon.png",
489 prefill: function(cb) {
490 // obtain prefill, in case of error you call cb with the error in the
491 // first arg instead of null
492 cb(null, prefill);
493 }
494 }]
495}
496```
497
498##### Checkbox field
499
500To specify a checkbox field use: `type: "checkbox"`
501The `prefill` value can determine the default state of the checkbox and it is required.
502
503```js
504var options = {
505 additionalSignUpFields: [{
506 type: "checkbox",
507 name: "newsletter",
508 prefill: "true",
509 placeholder: "I hereby agree that I want to receive marketing emails from your company",
510 // The following property is optional
511 ariaLabel: "Activate Newsletter"
512 }]
513}
514```
515
516##### Hidden field
517
518To specify a hidden field use: `type: "hidden"`. Both the `value` and `name` properties are required.
519
520```js
521var options = {
522 additionalSignUpFields: [{
523 type: "hidden",
524 name: "signup_code",
525 value: "foobar123"
526 }]
527}
528```
529
530#### Avatar provider
531
532Lock can show avatars fetched from anywhere. A custom avatar provider can be specified with the `avatar` option by passing an object with the keys `url` and `displayName`. Both properties are functions that take an email and a callback function.
533
534```js
535var options = {
536 avatar: {
537 url: function(email, cb) {
538 // obtain URL for email, in case of error you call cb with the error in
539 // the first arg instead of null
540 cb(null, url);
541 },
542 displayName: function(email, cb) {
543 // obtain displayName for email, in case of error you call cb with the
544 // error in the first arg instead of null
545 cb(null, displayName);
546 }
547 }
548};
549```
550
551### Popup mode
552
553A popup window can be displayed instead of redirecting the user to a social provider website. While this has the advantage of preserving page state, it has some issues. Often times users have popup blockers that prevent the login page from even displaying. There are also known issues with mobile browsers. For example, in recent versions of Chrome on iOS, the login popup does not [close properly](https://github.com/auth0/lock/issues/71) after login. For these reasons, we encourage developers to avoid this mode, even with Single Page Apps.
554
555If you decide to use popup mode you can activate it by passing the option `auth: {redirect: false}` when constructing `Auth0Lock`.
556
557```js
558var clientId = "YOUR_AUTH0_APP_CLIENTID";
559var domain = "YOUR_DOMAIN_AT.auth0.com";
560var options = {
561 auth: {
562 redirect: false
563 }
564};
565
566var lock = new Auth0Lock(clientId, domain, options);
567lock.show();
568```
569
570More information can be found in [Auth0's documentation](https://auth0.com/docs/libraries/lock/v11/authentication-modes#popup-mode).
571
572## Browser Compatibility
573
574We ensure browser compatibility in Chrome, Safari, Firefox and IE >= 10. We currently use [zuul](https://github.com/defunctzombie/zuul) along with [Saucelabs](https://saucelabs.com) to run integration tests on each push.
575
576## Issue Reporting
577
578If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The [Responsible Disclosure Program](https://auth0.com/whitehat) details the procedure for disclosing security issues.
579
580## Author
581
582[Auth0](https://auth0.com)
583
584## License
585
586This project is licensed under the MIT license. See the [LICENSE](LICENSE) file for more info.
587
588
589[circleci-image]: https://img.shields.io/circleci/project/github/auth0/lock.svg?style=flat-square
590[circleci-url]: https://circleci.com/gh/auth0/lock/tree/master
591[npm-image]: https://img.shields.io/npm/v/auth0-lock.svg?style=flat-square
592[npm-url]: https://npmjs.org/package/auth0-lock
593[license-image]: https://img.shields.io/npm/l/auth0-lock.svg?style=flat-square
594[license-url]: #license
595[downloads-image]: https://img.shields.io/npm/dm/auth0-lock.svg?style=flat-square
596[downloads-url]: https://npmjs.org/package/auth0-lock
597[david-image]: https://david-dm.org/auth0/lock/status.svg?style=flat-square
598[david-url]: https://david-dm.org/auth0/lock