# Cookie Consent Banner – React
The Cookie Consent Banner is implemented as Web Component and additionally exported as React Component. This guide explains how to use the React Component. _Click here to have a look on the documentation of the [Web Component](https://github.com/porscheofficial/cookie-consent-banner/tree/main/packages/cookie-consent-banner)._ _Make sure to also have a look on the [main repository](https://github.com/porscheofficial/cookie-consent-banner)._ --- - [Usage](#spiral_notepad-usage) - [Installation](#installation) - [Attributes](#attributes) - [Events Dispatched](#events-dispatched-by-the-component) - [Events Receivable](#events-receivable-by-the-component) - [Styling](#styling) - [Real World Example](#-real-world-example-with-tag-manager-and-custom-error-tracking) - [Disclaimer](#disclaimer) - [License](#license) ## :spiral_notepad: Usage ### Installation ```bash // yarn yarn add @porscheofficial/cookie-consent-banner-react // or npm npm i @porscheofficial/cookie-consent-banner-react --S ``` ### Properties | Property (React) | Default | Type | Description | | :------------------------------------------ | :---------------------------------------------------------- | :--------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | `availableCategories` | `[]` | `CategoryItem[]` | Provide the available Categories. See Real World example | | `cookieAttributes` | `{path: "/",expires: 7,domain: document.location.hostname}` | [`CookieAttributes`](./src/components/cookie-consent-banner/types.ts) | Customization of the cookie attributes for the consent cookie (`expires` can either be a number of days or a `Date` object). | | `cookieName` | `"cookies_accepted_categories"` | `string` | | | `disableResetSiteCookiesOnConsentWithdrawn` | `false` | `boolean` | Prevent cookies from being deleted automatically if consent of the user changed. | | `disableSlideInAnimation` | `false` | `boolean` | Disable slide-in animation of banner (See #7) | | `headline` | `undefined` | `string` | | | `btnLabelAcceptAndContinue` | `undefined` | `string` | | | `btnLabelAllAndContinue` | `undefined` | `string` | | | `btnLabelOnlyEssentialAndContinue` | `undefined` | `string` | | | `btnLabelPersistSelectionAndContinue` | `undefined` | `string` | | | `contentSettingsDescription` | `undefined` | `string` | | | `handlePreferencesRestored` | `undefined` | `({ acceptedCategories, }: { acceptedCategories: string[]; }) => void` | | `handlePreferencesUpdated` | `undefined` | `({ acceptedCategories, }: { acceptedCategories: string[]; }) => void` | | ### Events Dispatched by the Component Instead of listening to the events directly, the props `handlePreferencesRestored` and `handlePreferencesUpdated` can be used. | Event | Description | | ------------------------------------- | ------------------------------------------------------------------------------ | | `cookie_consent_preferences_restored` | Consent Settings have been saved previously and are now restored on Page Load. | | `cookie_consent_preferences_updated` | Consent Settings have been updated. Either initially set or changed. | ### Events Receivable by the Component It's possible to send JavaScript Events to control the banner. | Event | Description | | ----------------------------- | ---------------------------------------------------------------------------------------------- | | `cookie_consent_show` | Show the the Consent Banner. | | `cookie_consent_details_show` | Show the detailed settings (categories). Also the Consent Banner is shown if not done already. | #### How to use it? In order to allow the user to always update its preferences it's possible to trigger the banner by sending an event: ```html Show Cookie Settings ``` ### Convenience Functions #### React Hook `useCookieConsent` Subscribe to changes of the consent. ```ts import { useCookieConsent } from "@porscheofficial/cookie-consent-banner-react"; export const SomePage: React.FC = () => { const acceptedCategories = useCookieConsent(); //... }; ``` #### `triggerCookieConsentBanner` Easily show the cookie consent banner. ```ts import { triggerCookieConsentBanner } from "@porscheofficial/cookie-consent-banner-react"; // Only the banner triggerCookieConsentBanner(); // Also show the details triggerCookieConsentBanner({ showDetails: true }); ``` ### Styling Styling can be done in two different ways: Either via the availabe CSS Properties or via the [CSS `::part` pseudo-element](https://developer.mozilla.org/en-US/docs/Web/CSS/::part). #### Styling with CSS Properties The appearance of the component can be influenced by updating the availabe CSS Properties. In most cases this is enough customization flexibility but since not every aspect is exposed, you might want to use the [`::part` selectors](#styling-with-the-part-selectors) if you need more flexibility. ```html ``` #### Styling with the `::part` selectors For full control over the styles we provide you these CSS parts to customize completely by your own: 1. `cookie-consent-banner::part(button-accept-all)` for styling the primary button which triggers "Accept All Cookies" 2. `cookie-consent-banner::part(button-persist-selection)` for styling the secondary button which triggers "Save Selection" 3. `cookie-consent-banner::part(button-essential-only)` for styling the secondary button which triggers "Only required Cookies" 4. `cookie-consent-banner::part(checkbox)` for styling the checkboxes 5. `cookie-consent-banner::part(description-main)` for styling the main description text 6. `cookie-consent-banner::part(description-settings)` for styling the description text on the expanded settings 7. `cookie-consent-banner::part(headline)` for styling the headline 8. `cookie-consent-banner::part(body)` for styling the banner body ```html ``` ## 🚀 Real World example with Tag Manager and Custom Error Tracking This example shows how the component could be integrated into your web application. Additional scripts that set cookies, for which the consent of the visitor is required, can either be loaded via a tag manager or programmatically. In the following example, an `ErrorTrackingService` is initialized after the consent has been given and a Tag Manager Script is added to the head of the page. Once the visitor stores the consent settings, two things happen: The consent data is stored as a cookie `cookies_accepted_categories` and the tag manager is initialized, which takes care of other scripts (tags). Have a look on the main repository for an [example consent flow](https://github.com/porscheofficial/cookie-consent-banner#arrows_counterclockwise-consent-flow). ```jsx import { CookieConsentBanner, triggerCookieConsentBanner, } from "@porscheofficial/cookie-consent-banner-react"; const initConsent = ({ acceptedCategories }) => { // ------------------------------------------------------------------------- // Error Tracking Service // Analytics // ------------------------------------------------------------------------- if (acceptedCategories.includes("analytics")) { ErrorTrackingService.init({ dsn: process.env.DSN, environment: process.env.ENV, }); } }; const Root = ({ children }) => { const [acceptedCategories, setAcceptedCategories] = useState([]); return (
{(Boolean(acceptedCategories.includes("analytics")) || Boolean(acceptedCategories.includes("marketing"))) && process.env.ENV === "prod" && ( )}
{children}
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); }; ``` --- ## Disclaimer _Please note that you must individually assess the legal requirements regarding the implementation of the Cookie Consent Banner, in particular which choices to offer in which granularity and which information to provide in which detail and at which point of the user journey. The examples mentioned are not intended to provide any advice regarding legal requirements. All responsibility for the implementation of the Cookie Consent Banner and its compliance with legal requirements lies with the user._ ## License See [LICENSE](./LICENSE.md).