<template> <div> <span v-if="!available">{{ i18n.ts.waiting }}<MkEllipsis/></span> <div ref="captchaEl"></div> </div> </template> <script lang="ts" setup> import { ref, shallowRef, computed, onMounted, onBeforeUnmount, watch } from 'vue'; import { defaultStore } from '@/store'; import { i18n } from '@/i18n'; // APIs provided by Captcha services export type Captcha = { render(container: string | Node, options: { readonly [_ in 'sitekey' | 'theme' | 'type' | 'size' | 'tabindex' | 'callback' | 'expired' | 'expired-callback' | 'error-callback' | 'endpoint']?: unknown; }): string; remove(id: string): void; execute(id: string): void; reset(id?: string): void; getResponse(id: string): string; }; type CaptchaProvider = 'hcaptcha' | 'recaptcha' | 'turnstile'; type CaptchaContainer = { readonly [_ in CaptchaProvider]?: Captcha; }; declare global { interface Window extends CaptchaContainer { } } const props = defineProps<{ provider: CaptchaProvider; sitekey: string | null; // null will show error on request modelValue?: string | null; }>(); const emit = defineEmits<{ (ev: 'update:modelValue', v: string | null): void; }>(); const available = ref(false); const captchaEl = shallowRef<HTMLDivElement | undefined>(); const variable = computed(() => { switch (props.provider) { case 'hcaptcha': return 'hcaptcha'; case 'recaptcha': return 'grecaptcha'; case 'turnstile': return 'turnstile'; } }); const loaded = !!window[variable.value]; const src = computed(() => { switch (props.provider) { case 'hcaptcha': return 'https://js.hcaptcha.com/1/api.js?render=explicit&recaptchacompat=off'; case 'recaptcha': return 'https://www.recaptcha.net/recaptcha/api.js?render=explicit'; case 'turnstile': return 'https://challenges.cloudflare.com/turnstile/v0/api.js?render=explicit'; } }); const scriptId = computed(() => `script-${props.provider}`); const captcha = computed<Captcha>(() => window[variable.value] || {} as unknown as Captcha); if (loaded) { available.value = true; } else { (document.getElementById(scriptId.value) ?? document.head.appendChild(Object.assign(document.createElement('script'), { async: true, id: scriptId.value, src: src.value, }))) .addEventListener('load', () => available.value = true); } function reset() { if (captcha.value.reset) captcha.value.reset(); } function requestRender() { if (captcha.value.render && captchaEl.value instanceof Element) { captcha.value.render(captchaEl.value, { sitekey: props.sitekey, theme: defaultStore.state.darkMode ? 'dark' : 'light', callback: callback, 'expired-callback': callback, 'error-callback': callback, }); } else { window.setTimeout(requestRender, 1); } } function callback(response?: string) { emit('update:modelValue', typeof response === 'string' ? response : null); } onMounted(() => { if (available.value) { requestRender(); } else { watch(available, requestRender); } }); onBeforeUnmount(() => { reset(); }); defineExpose({ reset, }); </script>