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Pre API Hook

This function is called before any API call is being made to your backend from our frontend SDK. You can use this to change the request body / url / header or any other request property.

import Passwordless from "supertokens-auth-react/recipe/passwordless";

Passwordless.init({
    contactMethod: "EMAIL", // This example will work with any contactMethod.
    preAPIHook: async (context) => {
        let url = context.url;

        // is the fetch config object that contains the header, body etc..
        let requestInit = context.requestInit;

        let action = context.action;
        if (action === "EMAIL_EXISTS") {

        } else if (action === "PASSWORDLESS_CONSUME_CODE") {

        } else if (action === "PASSWORDLESS_CREATE_CODE") {

        } else if (action === "PASSWORDLESS_RESEND_CODE") {

        } else if (action === "PHONE_NUMBER_EXISTS") {

        }

        // events such as sign out are in the 
        // session recipe pre API hook (See the info box below)
        return {
            requestInit, url
        };
    }
})

Reading custom request information in the backend#

Visit this page to learn how to read custom headers etc from the request on the backend.

Which UI do you use?
Custom UI
Pre built UI