49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
// NOTE: This module will be used in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52044
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import { memoize } from 'lodash';
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export const RECAPTCHA_API_URL_PREFIX = window.gon.recaptcha_api_server_url;
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export const RECAPTCHA_ONLOAD_CALLBACK_NAME = 'recaptchaOnloadCallback';
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/**
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* Adds the Google reCAPTCHA script tag to the head of the document, and
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* returns a promise of the grecaptcha object
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* (https://developers.google.com/recaptcha/docs/display#js_api).
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*
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* It is memoized, so there will only be one instance of the script tag ever
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* added to the document.
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*
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* See the reCAPTCHA documentation for more details:
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*
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* https://developers.google.com/recaptcha/docs/display#explicit_render
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*
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*/
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export const initRecaptchaScript = memoize(() => {
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// Appends the the reCAPTCHA script tag to the head of document
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const appendRecaptchaScript = () => {
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const script = document.createElement('script');
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script.src = `${RECAPTCHA_API_URL_PREFIX}?onload=${RECAPTCHA_ONLOAD_CALLBACK_NAME}&render=explicit`;
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script.classList.add('js-recaptcha-script');
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document.head.appendChild(script);
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};
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return new Promise((resolve) => {
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// This global callback resolves the Promise and is passed by name to the reCAPTCHA script.
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window[RECAPTCHA_ONLOAD_CALLBACK_NAME] = () => {
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// Let's clean up after ourselves. This is also important for testing, because `window` is NOT cleared between tests.
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// https://github.com/facebook/jest/issues/1224#issuecomment-444586798.
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delete window[RECAPTCHA_ONLOAD_CALLBACK_NAME];
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resolve(window.grecaptcha);
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};
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appendRecaptchaScript();
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});
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});
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/**
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* Clears the cached memoization of the default manager.
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*
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* This is needed for determinism in tests.
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*/
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export const clearMemoizeCache = () => {
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initRecaptchaScript.cache.clear();
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};
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