ng2-google-recaptcha
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An Angular module implementing Google's reCAPTCHA that actually works, requires no additional dependancies and only needs a single import.
Currently built against Angular ^5.2.3 and Typescript ^2.6.2
ng2-google-recaptcha has the following additional dependancies
package.json and run npm install"ng2-google-recaptcha": "^5.0.0"
Optionally, you can manually install the package using the npm command line
npm install ng2-google-recaptcha --save
map and packages structures in systemjs.config.jsvar map = {
...
'ng2-google-recaptcha': 'node_modules/ng2-google-recaptcha'
};
var packages = {
...
'ng2-google-recaptcha': { main: 'index.js', defaultExtension: 'js' },
};
rootDir option to tsconfig.json to make sure TypeScript's default root path algorithm doesn't pull in the node_modules folderTo use ng2-google-recaptcha, you need to import the Ng2GoogleRecaptchaModule into the relevent module in your application. In the sample application this is done in the entry module - app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { Ng2GoogleRecaptchaModule } from 'ng2-google-recaptcha';
@NgModule({
imports: [
BrowserModule,
Ng2GoogleRecaptchaModule,
],
bootstrap: [
AppComponent,
],
})
export class AppModule { }
To add a reCAPTCHA all you need is to link to Google's reCAPTCHA script, a site key, and a response callback.
Add the following to your <head> tag in your main HTML page
<script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit" async defer></script>The following is the most basic component to implement the reCAPTCHA
@Component({
template: `<ng2-google-recaptcha
[siteKey]="recaptchaSiteKey"
(onCaptchaComplete)="onCaptchaComplete($event)">
</ng2-google-recaptcha>`,
})
export class BasicComponent {
private recaptchaSiteKey = 'YOUR-RECAPTCHA-SITE-KEY-HERE';
private onCaptchaComplete(response: any) {
console.log('reCAPTCHA response recieved:');
console.log(response.success);
console.log(response.token);
}
}
Once BasicComponent.onCaptchaComplete is called, the response element will contain the following attributes
If the users response times out, BasicComponent.onCaptchaComplete will be automatically called with a failed response and a null token, requiring the user to restart the process.
When specifying <ng2-google-recaptcha> you can pass through the following additional properties
@Component({
template: `<ng2-google-recaptcha
[captchaStyle]="recaptchaStyle"
[renderDelay]="delayToRender"
[recaptchaId]="thisRecaptchaId"
[siteKey]="recaptchaSiteKey"
(onCaptchaComplete)="onCaptchaComplete($event)">
</ng2-google-recaptcha>`,
})
export class BasicComponent {
private recaptchaSiteKey: string = 'YOUR-RECAPTCHA-SITE-KEY-HERE';
private delayToRender: number = 1000; // A one second delay before rendering this element
private thisRecaptchaId: string = 'this-is-my-unique-id'; // ID to uniquely identify this reCAPTCHA
// Style to use - all properties are optional and the style can be ommitted completely
private recaptchaStyle = {
theme: 'dark', // Uses the Dark theme for this reCAPTCHA
type: 'audio', // Use the audio version for user verification
size: 'compact', // Use the compact style
tabindex: 0, // Tab Index for this element
};
private onCaptchaComplete(response: string) {
console.log('reCAPTCHA response recieved:');
console.log(response);
}
}
If you require the user to redo the reCAPTCHA, you can call resetRecaptcha which will reload the reCAPTCHA and call the onCaptchaComplete callback with a null token allowing it to be reset.
@Component({
// ...
})
export class BasicComponent {
// How you get hold of the reCAPTCHA instance is up to you
@ViewChild(CreateRecaptchaComponent)
private recaptchaInstance: CreateRecaptchaComponent;
// Function called after we have used the reCAPTCHA token
private serverResponse() {
// ...
// If we received an error requiring the reCAPTCH to be done again,
// reset the element causing the previous token to be reset
recaptchaInstance.resetRecaptcha();
// ...
}
}
Check out the repository, browse to the './samples' folder and run npm install to install all the required dependancies.
Note: Running npm install on the sample project requires that Python 2.7.x is available on the command line as it runs a couple of Python scripts to correctly set up the npm_modules folder.
ng2-google-recaptcha is developed in Visual Studio Code so once npm install has finished you should be able to open the './samples' folder in VS Code and it will run out of the box (by default it uses lite-server which is installed as part of npm install).
If you are not using Visual Studio Code, browse to the './samples' folder and run tsc to build the application. Then open your local server of choice pointing to ./samples as the root directory.
FAQs
Angular component implementing Google's reCAPTCHA
We found that ng2-google-recaptcha demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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