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index.js
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index.js
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const React = require('react');
// Create script to init hCaptcha
let onLoadListeners = [];
let captchaScriptCreated = false;
// Generate hCaptcha API Script
const CaptchaScript = (hl, reCaptchaCompat) => {
// Create global onload callback
window.hcaptchaOnLoad = () => {
// Iterate over onload listeners, call each listener
onLoadListeners = onLoadListeners.filter(listener => {
listener();
return false;
});
};
let script = document.createElement("script");
script.src = "https://hcaptcha.com/1/api.js?render=explicit&onload=hcaptchaOnLoad";
script.async = true
if (hl) {
script.src += `&hl=${hl}`
}
if (reCaptchaCompat === false) {
script.src += '&recaptchacompat=off'
}
document.head.appendChild(script);
}
class HCaptcha extends React.Component {
constructor (props) {
super(props);
// API Methods
this.renderCaptcha = this.renderCaptcha.bind(this);
this.resetCaptcha = this.resetCaptcha.bind(this);
this.removeCaptcha = this.removeCaptcha.bind(this);
// Event Handlers
this.handleOnLoad = this.handleOnLoad.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
this.handleExpire = this.handleExpire.bind(this);
this.handleError = this.handleError.bind(this);
const isApiReady = typeof hcaptcha !== 'undefined';
if (!isApiReady)
captchaScriptCreated = false;
this.ref = React.createRef();
this.state = {
isApiReady,
isRemoved: false,
elementId: props.id,
captchaId: ''
}
}
componentDidMount () { //Once captcha is mounted intialize hCaptcha - hCaptcha
const { languageOverride, reCaptchaCompat } = this.props;
const { isApiReady } = this.state;
if (!isApiReady) { //Check if hCaptcha has already been loaded, if not create script tag and wait to render captcha
if (!captchaScriptCreated) {
// Only create the script tag once, use a global variable to track
captchaScriptCreated = true;
CaptchaScript(languageOverride, reCaptchaCompat);
}
// Add onload callback to global onload listeners
onLoadListeners.push(this.handleOnLoad);
} else {
this.renderCaptcha();
}
}
componentWillUnmount() {
const { isApiReady, isRemoved, captchaId } = this.state;
if(!isApiReady || isRemoved) return
// Reset any stored variables / timers when unmounting
hcaptcha.reset(captchaId);
hcaptcha.remove(captchaId);
}
shouldComponentUpdate(nextProps, nextState) {
// Prevent component re-rendering when these internal state variables are updated
if (this.state.isApiReady !== nextState.isApiReady || this.state.isRemoved !== nextState.isRemoved) {
return false;
}
return true;
}
componentDidUpdate(prevProps) {
// Prop Keys that could change
const keys = ['sitekey', 'size', 'theme', 'tabindex', 'languageOverride', 'endpoint'];
// See if any props changed during component update
const match = keys.every( key => prevProps[key] === this.props[key]);
// If they have changed, remove current captcha and render a new one
if (!match) {
this.removeCaptcha(() => {
this.renderCaptcha();
});
}
}
renderCaptcha() {
const { isApiReady } = this.state;
if (!isApiReady) return;
//Render hCaptcha widget and provide necessary callbacks - hCaptcha
const captchaId = hcaptcha.render(this.ref.current,
{
...this.props,
"error-callback" : this.handleError,
"expired-callback": this.handleExpire,
"callback" : this.handleSubmit
});
this.setState({ isRemoved: false, captchaId });
}
resetCaptcha() {
const { isApiReady, isRemoved, captchaId } = this.state;
if (!isApiReady || isRemoved) return
// Reset captcha state, removes stored token and unticks checkbox
hcaptcha.reset(captchaId)
}
removeCaptcha(callback) {
const { isApiReady, isRemoved, captchaId } = this.state;
if (!isApiReady || isRemoved) return
this.setState({ isRemoved: true }, () => {
hcaptcha.remove(captchaId);
callback && callback()
});
}
handleOnLoad () {
this.setState({ isApiReady: true }, () => {
this.renderCaptcha();
});
}
handleSubmit (event) {
const { onVerify } = this.props;
const { isRemoved, captchaId } = this.state;
if (typeof hcaptcha === 'undefined' || isRemoved) return
const token = hcaptcha.getResponse(captchaId) //Get response token from hCaptcha widget
const ekey = hcaptcha.getRespKey(captchaId) //Get current challenge session id from hCaptcha widget
onVerify(token, ekey) //Dispatch event to verify user response
}
handleExpire () {
const { onExpire } = this.props;
const { isApiReady, isRemoved, captchaId } = this.state;
if (!isApiReady || isRemoved) return
hcaptcha.reset(captchaId) // If hCaptcha runs into error, reset captcha - hCaptcha
if (onExpire) onExpire();
}
handleError (event) {
const { onError } = this.props;
const { isApiReady, isRemoved, captchaId } = this.state;
if (!isApiReady || isRemoved) return
hcaptcha.reset(captchaId) // If hCaptcha runs into error, reset captcha - hCaptcha
if (onError) onError(event);
}
execute () {
const { isApiReady, isRemoved, captchaId } = this.state;
if (!isApiReady || isRemoved) return
hcaptcha.execute(captchaId)
}
render () {
const { elementId } = this.state;
return <div ref={this.ref} id={elementId}></div>
}
}
module.exports = HCaptcha;