reCAPTCHA v3 not working angular 6 - error executing

问题

I am implementing Google reCAPTCHA v3 with Angular 6.

<script src='https://www.google.com/recaptcha/api.js?render=KEY'></script>

Added script in index.html

In my AppComponent,

constructor(
    @Inject(DOCUMENT) private document: any
) {
    this.grecaptcha = this.document.grecaptcha;
}

and when i click form submit,

this.grecaptcha.execute('KEY', { action: 'action_name' })
  .then(function (token) {
      // Verify the token on the server.
      console.log(token);
});

But,

ERROR TypeError: Cannot read property 'execute' of undefined

回答1:

the object should be available from window, so all you need is to declare it on top of your ts file:

declare const grecaptcha: any;

then you can use it in your class like:

grecaptcha.execute('KEY', { action: 'action_name' })
  .then(function (token) {
      // Verify the token on the server.
      console.log(token);
})

You can also try to install the typings @types/grecaptcha, to get some type hinting to make your life a bit easier

来源：https://stackoverflow.com/questions/53761994/recaptcha-v3-not-working-angular-6-error-executing