react-google-recaptcha
React component for Google reCAPTCHA v2.
Installation
npm install --save react-google-recaptcha
Usage
All you need to do is sign up for an API key pair. You will need the client key then you can use <ReCAPTCHA />
.
The default usage imports a wrapped component that loads the google recaptcha script asynchronously then instantiates a reCAPTCHA
the user can then interact with.
Here is a simple working example on codesandbox.io.
Code Example:
import ReCAPTCHA from "react-google-recaptcha";
function onChange(value) {
console.log("Captcha value:", value);
}
ReactDOM.render(
<ReCAPTCHA
sitekey="Your client site key"
onChange={onChange}
/>,
document.body
);
Component Props
Properties used to customise the rendering:
Name | Type | Description |
---|---|---|
sitekey | string | The API client key |
onChange | func | The function to be called when the user successfully completes the captcha |
theme | enum |
optional light or dark The theme of the widget (defaults: light ). See example
|
type | enum |
optional image or audio The type of initial captcha (defaults: image )
|
tabindex | number |
optional The tabindex on the element (default: 0 )
|
onExpired | func | optional callback when the challenge is expired and has to be redone by user. By default it will call the onChange with null to signify expired callback. |
onErrored | func | optional callback when the challenge errored, most likely due to network issues. |
stoken | string | optional set the stoken parameter, which allows the captcha to be used from different domains, see reCAPTCHA secure-token |
size | enum |
optional compact , normal or invisible . This allows you to change the size or do an invisible captcha |
badge | enum |
optional bottomright , bottomleft or inline . Positions reCAPTCHA badge. Only for invisible reCAPTCHA
|
Component Instance API
The component instance also has some utility functions that can be called. These can be accessed via ref
.
-
getValue()
returns the value of the captcha field -
getWidgetId()
returns the recaptcha widget Id -
reset()
forces reset. See the JavaScript API doc -
execute()
programmatically invoke the challenge- need to call when using
"invisible"
reCAPTCHA - example below
- need to call when using
Example:
const recaptchaRef = React.createRef();
...
onSubmit = () ={
const recaptchaValue = recaptchaRef.current.getValue();
this.props.onSubmit(recaptchaValue);
}
render() {
return (
<form onSubmit={this.onSubmit} >
<ReCAPTCHA
ref={recaptchaRef}
sitekey="Your client site key"
onChange={onChange}
/>
</form>
)
}
Invisible reCAPTCHA
See the reCAPTCHA documentation to see how to configure it.
With the invisible option, you need to handle things a bit differently. You will need to call the execute
method yourself.
import ReCAPTCHA from "react-google-recaptcha";
const recaptchaRef = React.createRef();
ReactDOM.render(
<form onSubmit={() => { recaptchaRef.current.execute(); }}>
<ReCAPTCHA
ref={recaptchaRef}
size="invisible"
sitekey="Your client site key"
/>
</form>,
document.body
);
Advanced usage
Global properties used by reCaptcha
lang: By default google reCaptcha infers the user's interface language. In order to overwrite the language and update the translation for the reCaptcha widget, you can create a global variable configuring the desired language via lang
.
useRecaptchaNet: If google.com is blocked, you can set useRecaptchaNet
to true
so that the component uses recaptcha.net instead.
removeOnUnmount: If you plan to change the lang dynamically, removeOnUnmount
should probably be true
. This unloads the google recaptcha script on componetWillUnmount
to allow for a new google recaptcha script to load next time the reCAPTCHA component is used to facilitate a new language if needed.
Example global properties:
window.recaptchaOptions = {
lang: 'fr',
useRecaptchaNet: true,
removeOnUnmount: false,
};
ReCaptcha loading google recaptcha script manually
You can also use the barebone components doing the following. Using that component will oblige you to manage the grecaptcha dep and load the script by yourself.
import { ReCAPTCHA } from "react-google-recaptcha";
const grecaptchaObject = window.grecaptcha // You must provide access to the google grecaptcha object.
render(
<ReCAPTCHA
ref={(r) => this.recaptcha = r}
sitekey="Your client site key"
grecaptcha={grecaptchaObject}
/>,
document.body
);
Notes on Requirements
At least React@16.4.1
is required due to forwardRef
usage in the dependency react-async-script.
Notes
Pre 1.0.0
and React < 16.4.1
support details in 0.14.0.