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ngx-captcha
Advanced tools
Google reCaptcha implementation for Angular 14.
Features:
Live examples: https://enngage.github.io/ngx-captcha/
npm install ngx-captcha
Import NgxCaptchaModule
to your module (i.e. AppModule
)
Depending on whether you want to use reactive forms or template-driven forms you need to include the appropriate modules, too.
Add ReactiveFormsModule
to your imports in case you want to use reactive forms. If you prefer the the template-driven approach simple add the FormsModule
to your module.
Both can be imported from @angular/forms
. In the demo project you can check out the normal demo to see how to use reactive forms or the invisible demo to see what the template-driven approach looks like. With the template-driven approach you don't necessarily need to use a from element to wrap the component, you can instead use the [ngModelOptions]="{ standalone: true }"
.
However, using it with the standalone option is not recommended but can be used if needed.
import { NgModule } from '@angular/core';
import { ReactiveFormsModule } from '@angular/forms';
import { NgxCaptchaModule } from 'ngx-captcha';
@NgModule({
imports: [
ReactiveFormsModule,
NgxCaptchaModule
})
export class AppModule { }
The configuration properties are a copy of the official ones that google provides. For explanation of what these properties do and how to use them, please refer to https://developers.google.com/recaptcha/docs/display and https://developers.google.com/recaptcha/docs/invisible.
your.component.ts
export class YourComponent implements OnInit {
protected aFormGroup: FormGroup;
constructor(private formBuilder: FormBuilder) {}
ngOnInit() {
this.aFormGroup = this.formBuilder.group({
recaptcha: ['', Validators.required]
});
}
}
your.template.html
<form [formGroup]="aFormGroup">
<ngx-recaptcha2 #captchaElem
[siteKey]="siteKey"
(reset)="handleReset()"
(expire)="handleExpire()"
(load)="handleLoad()"
(success)="handleSuccess($event)"
[useGlobalDomain]="false"
formControlName="recaptcha">
</ngx-recaptcha2>
</form>
This is the implementation of beta version of google reCaptcha v3 as per following documentation"https://developers.google.com/recaptcha/docs/v3".
First you need to inject the class in your component / service and then use Execute method with your action. Once you have the token, you need to verify it on your backend to get meaningful results. See official google documentation for more details.
import { ReCaptchaV3Service } from 'ngx-captcha';
constructor(
private reCaptchaV3Service: ReCaptchaV3Service
) { }
....
this.reCaptchaV3Service.execute(this.siteKey, 'homepage', (token) => {
console.log('This is your token: ', token);
}, {
useGlobalDomain: false
});
<form [formGroup]="aFormGroup">
<ngx-invisible-recaptcha #captchaElem
[siteKey]="siteKey"
(reset)="handleReset()"
(ready)="handleReady()"
(load)="handleLoad()"
(success)="handleSuccess($event)"
[ngModel]="recaptcha"
[ngModelOptions]="{ standalone: true }">
</ngx-invisible-recaptcha>
</form>
Unit testing in Angular is possible, but a bit clunky because this component tries to dynamically include google's script if its not already loaded. You are not required to include in globally or manually which has a benefit of not loading until you actually use this component. This has a caveat though, since the load
callback is executed outside of Angular's zone, performing unit tests might fail due to racing condition where Angular might fail the test before the script has a chance to load and initialize captcha.
A simple fix for this is wait certain amount of time so that everything has a chance to initialize. See example below:
beforeEach(() => {
fixture = TestBed.createComponent(YourComponent);
component = fixture.componentInstance;
setTimeout(function () {
fixture.detectChanges();
}, 2000);
});
Other possible scenario might be including google's script globally. If someone has a better solution, please do let me know or submit a PR for a change in readme.
Under projects\ngx-captcha-lib
run
npm run publish-lib
FAQs
Dynamic captcha (Google reCaptcha) implementation for Angular
The npm package ngx-captcha receives a total of 27,100 weekly downloads. As such, ngx-captcha popularity was classified as popular.
We found that ngx-captcha 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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