Web Integration

Reference to integrate the Widget on your web application or web page

Plain HTML Integration

To integrate the Widget, you just need to include the Fintoc script on your HTML. The Fintoc script needs to be on each page where the Widget needs to be used.

<script src="https://js.fintoc.com/v1/"></script>



Remember that, when importing a JavaScript script, if you try to use functions before the browser loads the script, an error will be raised. You can solve this by using the native browser event window.onload.

ES Module Integration

You can also use the Widget as an ES module through npm! Just use our @fintoc/fintoc-js library!

npm install @fintoc/fintoc-js

The library exports an async getFintoc method that returns the Fintoc object!

import { getFintoc } from '@fintoc/fintoc-js';

// You can read more about the parameters below
const options = { ... };

const main = async () => {
  const Fintoc = await getFintoc();
  const widget = Fintoc.create(options);


How it works

When including the Fintoc script on your application (or after using the getFintoc method of the @fintoc/fintoc-js library), you will have access to the Fintoc class, that will allow you to create connections with a financial institution from within your application.

const widget = Fintoc.create({


Note: remember to call the .open() method in order to raise the widget.

publicKeystringThe publicKey is used to identify your web application or web page within Fintoc. Links created with a publicKey will get assigned to the organization or user that owns said publicKey.
This token will determine whether you're using the sandbox or the production environment. Remember that the publicKey of the sandbox starts with pk_test_, while the production one starts with pk_live_.
holderTypestringThe holderType parameter can be business or individual, and determines the type of account that will be connected to Fintoc. For the payment initiation product you must always use individual as the holder_type.
productstringThe product parameter can be movements, subscriptions, invoices, or payments, and determines the product and type of Link that will be created.
countrystringThe country parameter must be the ISO 3166-1 alfa-2 code of the country to which you're trying to connect. It can be cl or mx. Defaults to cl.
institutionIdstringOptional. The institutionId parameter corresponds to the id of a financial institution. If included, said institution will be pre-selected. For example, the value cl_banco_estado would command the widget to open with Banco Estado by default. Before pre-selecting an institution, check the availability using the list institutions endpoint
usernamestring or objectOptional. The username pre-fills the username field when making a payment.

The attributes of the username object are below. If a string is sent, it will take the default value for the editable attribute.
webhookUrlstringOnly used for movements and invoices products, if you are integrating payments or subscriptions you don't need this.

The webhookUrl parameter corresponds to the URL that will get a request with the new Link after its successful creation, including its link_token.
widgetTokenstringThe widgetToken parameter corresponds to the token created by the backend that initializes and configures the widget.

Right now, only the payments and subscriptions products uses a widgetToken parameter.
onSuccessfunctionThe onSuccess parameter corresponds to a callback that will be called after the flow finishes successfully.
onExitfunctionThe onExit parameter corresponds to a callback that will be called after a user closes the Widget prematurely.
onEventfunctionThe onEvent parameter corresponds to a callback that will be called every time after a user executes a meaningful action on the Widget.


Use the Widget callbacks and events correctly

Never use the onSuccess, onExit or onEvent callbacks to get the state of the resource being created. You should only use these callbacks to handle the flow of your frontend application, while waiting backend confirmation, either via Webhooks or by exchanging some exchange token. Frontend events can also be used to generate metrics about general widget usage, but you should never rely solely on them to assume a resource was created or failed to be created.

Username Object

To pre-fill a username and change the default values, you can send an object with the following attributes

username = {
  value: "123456789",
  editable: true
valuestringThe username that will be pre-filled on the widget. In Chile you should input the user's RUT and in Mexico you should input the user's phone number.
editableboolWhether the field is editable or not in the widget. By default it's set to true.

Methods of the Widget object

Once a widget object gets created, you can use its methods to interact with it. The available methods are open, close and destroy.

widget.open()The open method opens the Widget whenever it is called.
widget.close()The close method closes the widget whenever it is called. It does not destroy the widget instance, it only hides it from the user. You can call the open method after the close method and the widget will show again.
widget.destroy()The destroy method removes the Widget instance from your application. If you want to re-open the widget after calling the destroy method, you will need to create another Widget instance using Fintoc.create().


How to use the widget.destroy() method

When using Fintoc.create(args), an iframe gets embedded within your application. Sometimes (primarily when developing an SPA), you might need to remove this iframe. This can get done using the destroy method. If you then need to re-open the widget, you will need to create a new instance using the Fintoc.create(args) method once again.