Access cookies in LWC component

Question

All,

Is it possible to read cookies in an LWC component? (I think it is possible through Visualforce pages, but I need to do this in an LWC component)

According to the documentation, I should get all the cookies when i fire this command:

Cookie ck= ApexPages.currentPage().getCookies().get('cookie_name');

But, I always get a null value when I do

ApexPages.currentPage()

Edited: This component will be present on the main community login page. Here is the class:

public with sharing class CookieSync {
public CookieSync() {

}
@AuraEnabled
public static String customSync(){
    System.debug('checkpoint1');
    system.debug(ApexPages.currentPage()); //returns null
    // logic omitted.
    return 'test';
}

}

Answer 1

The @AuraEnabled method is not called in an ApexPages context as one would expect. Much of the ApexPages documentation only applies to VisualForce and Aura components.

On the client side, the LWC component is limited in accessing document.cookie - only cookies that were also set from the LWC component can be accessed. This is due to the "Secure" Locker API: https://developer.salesforce.com/docs/component-library/tools/locker-service-viewer.

So it is kind of possible to read cookies in an LWC component, but you need to "manually" pass it as a parameter on the @AuraEnabled method.