API

Usage

The Didomi Web SDK exposes a complete API on the page via JavaScript for interacting with the Didomi platform. This allows your scripts to programmatically interact with the Didomi SDK. You can check the user consent status, register consents that you would collect yourself, and show/hide the Didomi UI.

Didomi ready

The API is exposed on the window.Didomi object. All calls to the Didomi API (except for the standard IAB __cmp function) must be enclosed within a window.didomiOnReady callback to ensure that the SDK is ready before calling it:

Plain Javascript

<script type="text/javascript">
window.didomiOnReady = window.didomiOnReady || [];
window.didomiOnReady.push(function (Didomi) { 
    // Call other functions on the SDK
});
</script>

React

onDidomiReady(didomi) {
  console.log('Didomi Ready');
  // Call other functions on the SDK
}

...

<DidomiSDK
    ...
    onReady={this.onDidomiReady.bind(this)}
/>

The window.didomiOnReady callbacks are called after the SDK is initialized and has loaded its configuration.

Setting window.didomiConfig in a window.didomiOnReady callback has no effect as the SDK is already initialized at that point. window.didomiConfig must be set at the root of the page and outside of any callback.

postMessage API

If your JavaScript is not directly present on the page where the Didomi Web SDK is embedded but is present within an iframe on that page, you can communicate with the Didomi Web SDK through the postMessage API of the browser.

Available functions

Currently only getCurrentUserStatus is exposed via this API to allow reading the consent status of the user. To better understand its usage, you can refer to its definition.

Messages structure

The Didomi API is exposed with the same structure as the IAB CMP API.

The message to send should have the below form where:

• command is the name of the function on the window.Didomi object to call

• parameter is an array of parameters passed to the function called on the window.Didomi object

• callId is a unique value that will be sent back with the response from Didomi, allowing you to identify what call the response is for

window.parent.postMessage({
  __cmpCall: 
    {
      command: "*command*", 
      parameter: [param1, param2, ...], 
      callId: *uniqueId*
    }
}, "*");

The Didomi Web SDK will send back the message below to your frame with the postMessage API containing a response for your command where:

• returnValue is the value returned by the API function called

• success is a boolean flag indicating whether the call was successful or not

• callId is the unique value provided as callId in your original message

{
  __cmpReturn: 
    {
      returnValue: *returnValue*, 
      success: *boolean*, 
      callId: *uniqueId*
    }
}

Usage example

Here is a complete example of how to call one of the available functions of the postMessage API (getCurrentUserStatus) and collect its response:

window.addEventListener(
  "message",
  function (event) {
    try {
      var data = typeof event.data === "string" ? JSON.parse(event.data) : event.data;

      if (data && data.__cmpReturn) {
        // data.__cmpReturn contains the response from the CMP
        if (data.__cmpReturn.callId === "get-current-user-status") {
          // This is the response to our call for getting the user status
          // The status is in data.__cmpReturn.returnValue
          // Do something
        }
      }
    } catch (e) {
      // An error happened when decoding the message data
      // Most likely, the message wasn't related to the CMP so do nothing
    }
  },
  false
);

window.parent.postMessage(
  {
    __cmpCall: {
      command: "getCurrentUserStatus",
      parameter: [],
      callId: "get-current-user-status",
    },
  },
  "*",
);

Determining the frame containing the Didomi CMP

The frame to send the postMessage to can be determined by the ancestor with a .frames["cmpLocator"] child iframe present.

If your code runs in a direct iframe of the page containing the window.Didomi object then you can simply use window.parent as the reference to send messages to.

If your code might run multiple levels removed from the frame containing the window.Didomi object, you can search for the correct frame to send a message to with the following code:

var f = window;
var cmpFrame;

while (!cmpFrame) {
  try {
    if (f.frames["__cmpLocator"]) cmpFrame = f;
  } catch (e) {}

  if (f === window.top) break;

  f = f.parent;
}

Notice config

getExperiment()

Get the currently configured AB test (experiment) and the user information for that test.

Parameters

No parameter.

Returns

An object with the following properties:

Example

{
    "id": "experiment-id",
    "group": "control",
    "size": 0.1,
    "startDate": "2019-03-06T23:38:50.000Z"
}

isRegulationApplied(regulation)

Check if a given regulation applies to the current user.

Parameters

Returns

A boolean indicating whether the user is subject to the regulation and support for the regulation is enabled for the website.

Example

if (Didomi.isRegulationApplied('gdpr')) {
  // The user is subject to GDPR, do something
}

if (Didomi.isRegulationApplied('ccpa')) {
  // the user is subject to CCPA, do something
}

navigate(button)

Simulate a user input by indicating to the SDK that the user has pressed a button on an input device like a keyboard or a TV remote control. This function is usually called when mapping TV remote control inputs to the Didomi SDK.

This function is only available if the TV mode of the SDK is enabled by adding the following didomiConfig to your page:

window.didomiConfig = {
  mode: 'tv' // Enable TV mode
};

window.didomiConfig must be set outside of any callback like window.didomiOnReady to be effective.

If no UI view is displayed from the Didomi SDK (notice, purposes, or vendors), this function has no effect and will log an error message that can be ignored.

Parameters

The button parameter can take one of the following values:

Returns

No return value.

Example

Didomi.navigate('down');
Didomi.navigate('confirm');

notice.isVisible()

Check if the consent notice is currently displayed.

Parameters

No parameter.

Returns

Boolean

Example

Didomi.notice.isVisible();

preferences.show(view)

Show the preferences manager. This can be used to allow the user to update their consent choices after the notice has been closed. We suggest adding a link with this function call somewhere on your website.

Parameters

Returns

Nothing

Example

Didomi.preferences.show('purposes');

---

User status

addVendorStatusListener

Definition

Listens to the user’s status for a given vendor and returns a callback when the status changes.

Parameters

Returns

Numeric value indicating the index position of the listener (zero-based indexing) in the list of registered listeners.

Example

Didomi.addVendorStatusListener("google",(status) => console.log("Google: listener 1: status", status))

clearUser()

Clear the user configuration details set via setUser or window.didomiConfig.user in a single-page application. This function does not clear the local user status (use reset() for that).

If your website is not a single-page application, do not use this function and stop setting the user configuration details via window.didomiConfig.user on page load instead.

Parameters

No parameter.

Returns

Promise<void>

Example

await Didomi.clearUser();

getCurrentUserStatus()

Definition

Exposes the user status for the current regulation that applies.

Parameters

No parameters.

Returns

The user status containing the computed global status for Vendors and purposes:

• A vendor's global status is enabled, if and only if:

  • the vendor is enabled directly in the vendors layer in all legal basis

  • AND all its related purposes are enabled or essential.

• A purpose's global status is enabled in one of the two conditions:

  • the purpose is enabled for all the legal basis that it is configured for.

  • OR when the purpose is essential.

Example

Didomi.getCurrentUserStatus();

getRequiredPurposeIds

Get the list of purpose IDs that are configured for the consent notice and that consent is collected for.

Parameters

No parameter.

Returns

An array of purpose IDs.

Example

// Returns ['cookies']
Didomi.getRequiredPurposeIds();

getRequiredVendorIds

Get the list of vendor IDs that are configured for the consent notice and that consent is collected for.

Parameters

No parameter.

Returns

An array of vendor IDs.

Example

// Returns ['google']
Didomi.getRequiredVendorIds();

isUserStatusPartial()

This function assesses whether the user has made choices regarding all the vendors and data processing tasks specified by the regulation. It returns true if there are any vendors or data processing activities for which the user has yet to express a preference.

Requires SDK to be initialized.

Parameters

No parameter.

Returns

Boolean

The function returns true when the following conditions are all met:

1. A relevant regulation applies to the current user, meaning the regulation is not classified as none.

2. There is at least one vendor configured. Without any configured vendors, the function defaults to false since there are no statuses to evaluate.

3. There is a lack of user status for certain vendors or for specific purposes.

In all other scenarios, the function will return false.

For example, when the regulation is set to none, indicating that no specific regulation is applicable to the end-user, the function will yield false.

An important edge case to consider is when a new vendor is introduced to the system and their status has not yet been collected. In such instances, the function will return true until the user updates their preferences through the notice banner.

Example

Didomi.isUserStatusPartial();

openCurrentUserStatusTransaction

Create an instance of the CurrentUserStatusTransaction object.

This object provides mechanisms to stage updates to the user status regarding purposes and vendors, allowing for batch operations.

Updates made through its methods are queued and applied simultaneously to the user status only once the commit method of the returned object is called.

Additional notes:

• The status of vendors and purposes whose IDs are not not specified through the methods provided by CurrentUserStatusTransaction are kept unchanged.

• Essential purposes are always set to enabled and can’t be updated by the methods provided by CurrentUserStatusTransaction.

• When the regulation applied for a user is none, the methods provided by CurrentUserStatusTransaction should not update the status of any vendor or purpose which will always remain as enabled. When the commit method is called it will return false.

• If the IDs that are passed through the methods provided by CurrentUserStatusTransaction don’t correspond to vendors or purposes required by the Notice Config, they will be ignored.

Parameters

No parameter.

Returns

An instance of the CurrentUserStatusTransaction object.

Examples

const transaction = didomi.openCurrentUserStatusTransaction();

// enable a purpose
transaction.enablePurpose("cookies");
// enable purposes
transaction.enablePurposes(["cookies", "analytics"]);
// disable a purpose
transaction.disablePurpose("analytics");
// disable purposes
transaction.disablePurposes(["cookies", "analytics"]);
// enable a vendor
transaction.enableVendor("vendor-1");
// enable vendors
transaction.enableVendors(["vendor-1", "vendor-2"]);
// disable a vendor
transaction.disableVendor("vendor-1");
// disable vendors
transaction.disableVendors(["vendor-1", "vendor-1"]);

// chain multiple calls
transaction.enablePurpose("cookies").disablePurpose("analytics");

// save user choices
transaction.commit();

Error handling

Invalid purposes or vendors will be ignored, errors will be logged in the browser's console

const transaction = Didomi.openCurrentUserStatusTransaction();
// enable purposes
transaction.enablePurposes(['cookies', 'invalid_ID']);
transaction.commit();

// Console output:
'Didomi SDK - disablePurpose ignored due to invalid purpose: invalid_ID'
true

reset()

Reset all the consent information for the current user and assign a new user ID. This will remove all cookies created by Didomi and will trigger re-collection of consent. The consent notice will be displayed again.

Parameters

No parameter.

Returns

Nothing

Example

Didomi.reset();

setUser(userConfiguration)

Update the user configuration details in a single-page application. You can provide the user configuration options as part of the userConfiguration parameter.

If your website is not a single-page application, do not call this function and set the user configuration details via window.didomiConfig.user on page load instead.

The setUser function will update all the provided properties and set the others to undefined. If a property is omitted, it will be set to undefined.

Parameters

Returns

Nothing

Example

Didomi.setUser({ organizationUserId: 'organizationUserID' });

setUserAgreeToAll()

Report that the user has enabled consents and legitimate interests for all purposes and vendors configured for your website.

This function will log the user choice on our platform and close the notice.

Consent statuses for essential purposes are not stored. Read our detailed section to see how essential purposes behave and how to configure them.

Please read our article on what to expect from your analytics when setting a custom behavior for your consent notice.

Parameters

No parameter.

Returns

Nothing

Example

Didomi.setUserAgreeToAll();

setUserDisagreeToAll()

Report that the user has disabled consents and legitimate interests for all purposes and vendors configured for your website.

This function will log the user choice on our platform and close the notice.

Consent statuses for essential purposes are not stored. Read our detailed section to see how essential purposes behave and how to configure them.

Please read our article on what to expect from your analytics when setting a custom behavior for your consent notice.

Parameters

No parameter.

Returns

Nothing

Example

Didomi.setUserDisagreeToAll();

setCurrentUserStatus

Definition

Set the user status for purposes and vendors. This function will trigger events and API calls every time it is called (and the user status changes) so make sure to push all user choices at once and not one by one.

Please read our article on what to expect from your analytics when setting a custom behavior for your consent notice.

Parameters

Add the desired global status for each vendor and each purpose:

• the vendor status specified in this function will be reflected on the vendor’s layer.

  • vendor enabled : true → means the vendor is enabled in all the legal basis that this vendor uses.

  • vendor enabled : false → means the vendor is disabled in all the legal basis that this vendor uses

• the purposes status specified in this function will be reflected on the preferences layer.

  • purpose enabled : true → means the purpose is enabled in all the legal basis in which it’s defined.

  • purpose enabled : false → means the purpose is disabled in all the legal basis in which it’s defined.

Returns

boolean

true if the user choices have changed (i.e. the user had made different choices before this function got called).

Examples

Didomi.getCurrentUserStatus();

setWidgetLocale()

This function is only supported by Privacy widgets.

Definition

Set the language for a widget.

Parameters

Example

const widget = await Didomi.getContainerById("WIDGET_ID")

widget.setWidgetLocale('fr')

shouldUserStatusBeCollected()

Determine if user status (consent) should be collected for the visitor. Returns true if user status is required for the current user and one of following two conditions is met:

• User status has never been collected for this visitor yet

• New user status should be collected (as new vendors have been added) AND the number of days before recollecting them has exceeded

• The ignoreConsentBefore flag has been set with a date that applies to force consent renewal

If none of these conditions is met, the function returns false. This function is mainly present to allow you to know when to display your own notice if you have disabled our standard notice.

Parameters

No parameter.

Returns

Boolean

Example

Didomi.shouldUserStatusBeCollected();

syncUser()

Update the local user status from the server in a single-page application if the server has a more recent user status than the local one.

If your website is not a single-page application, do not call this function as syncing will be done automatically when the the user configuration details are set via window.didomiConfig.user on page load.

The synchronization only runs if the following conditions are met: synchronization is enabled in the configuration, an organization user ID has been provided for the user, the user is not a bot, and the sync frequency has not been exceeded.

Parameters

No parameter.

Returns

A promise that resolves when the user status has been synced with the server:

Promise<SyncReadyEvent>

A SyncReadyEvent is provided as the return value of the function with the following properties:

Example 1 - Simple sync

await Didomi.syncUser();

Example 2 - Reassurance notice

const syncResult = await Didomi.syncUser();

if (syncResult.statusApplied) {
    // The user status actually changed from syncing
    
    // Show your reassurance notice
    
    // Report the reassurance notice as shown
    syncResult.syncAcknowledged();
}

---

GDPR

__tcfapi(command, version, callback, parameter)

Didomi is fully compliant with the CMP API from the IAB Transparency and Consent framework version 2. We expose a __tcfapi function and listen to postMessage events as per the specification.

Example (getting the IAB consent string):

__tcfapi('getTCData', null, function (result) {
  // The IAB consent string is available in the `tcString` property of the object
  console.log(result.tcString);
});

Read more in the IAB documentation