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A simple invisible Google reCAPTCHA component with vue

A simple invisible Google reCAPTCHA component with vue

vue-programmatic-invisible-google-recaptcha

A simple invisible Google reCAPTCHA component focused solely on programmatic invocation.

Install

# npm
npm i vue-programmatic-invisible-google-recaptcha

# yarn
yarn add vue-programmatic-invisible-google-recaptcha

Or you can include it through the browser at the bottom of your page:

<script src="https://unpkg.com/vue-programmatic-invisible-google-recaptcha"></script>

About

This is a simple component that helps deal with an invisible Google reCAPTCHA that you intend to invoke programmatically. There are a few plugins that help with Google's reCAPTCHA, but this one is focused on the invisble version with a programmatic invocation only. Due to its nature, reCAPTCHA can be a little complex - so that is what is driving the narrow scope here. Library supports easy multiple reCAPTCHAs on the same page.

Here's a breakdown of the steps you go through when using this library:

  • Load the Google reCAPTCHA library using the provided script tag.
  • Whenever you'd like, invoke the reCAPTCHA using this.$refs.invisibleRecaptcha1.execute() method (replacing invisibleRecaptcha1 with the ref name you set).
  • Google will either decide to show a challange or not. Either way, you'll get the recaptchaToken in the registered recaptchaCallback event. Make sure to register for that.
  • Use that token to verify in your backend.
  • Call the method again if you'd like to get a new token.

Usage Example

import VueProgrammaticInvisibleGoogleRecaptcha from 'vue-programmatic-invisible-google-recaptcha'
Vue.component('vue-programmatic-invisible-google-recaptcha', VueProgrammaticInvisibleGoogleRecaptcha)
<!-- Put this in your base HTML file - I use Vue CLI 3 so I put it at the bottom of the ./public/index.html file. -->
<script src="https://www.google.com/recaptcha/api.js?render=explicit" async defer></script>

<!-- This is in the component you want to have the reCAPTCHA -->
<vue-programmatic-invisible-google-recaptcha
    ref="invisibleRecaptcha1"
    :sitekey="'<YOUR_SITEKEY_HERE>'"
    :elementId="'invisibleRecaptcha1'"
    :badgePosition="'left'"
    :showBadgeMobile="false"
    :showBadgeDesktop="true"
    @recaptchaCallback="recaptchaCallback"
></vue-programmatic-invisible-google-recaptcha>

<!-- Where you want to invoke the reCAPTCHA -->
submitButtonClicked() {
    // Do whatever you want here (probably some validation). After
    // that's done (or passed your expectations) you can then invoke the reCAPTCHA.
    this.$refs.invisibleRecaptcha1.execute()
},

<!-- The reCAPTCHA's registered callback. This is where you'll get your token. -->
recaptchaCallback (recaptchaToken) {
    // Use the `recaptchaToken` to pass to your backend to verify the token
    axios.post('/enter', {recaptchaToken: recaptchaToken}).then((result) => {
        console.log(result)
    })
},

Note - I find it to be a good idea to allow the user to reset their reCAPTCHA on their own if they're experiencing an issue. This component exposes a function for this. To do this, give them a button with the following code in the click function: this.$refs.invisibleRecaptcha1.reset(). This will reset the reCAPTCHA and hopefully get them passed the issue they're having.

Props

prop type description required default
ref String Unique String gives you control over the component Yes
sitekey String Public key given to you by Google. Yes
elementId String Unique String for the id of the element. Allows for multiple seperate reCAPTCHAs Yes
badgePosition String Pass 'left' to show badge on left side of screen. No 'right'
showBadgeMobile Boolean true to show badge on mobile. false to hide badge on mobile. No true
showBadgeDesktop Boolean true to show badge on desktop. false to hide badge on desktop. No true

Methods

Note - call these methods through the ref you set up with your component. Example: this.$refs.invisibleRecaptcha1.execute().

method parameters description
execute none Used to gather the token. If Google decides that the user needs to complete a test they'll do it here.
reset none Used to reset the reCAPTCHA instance.

Events

event value description
recaptchaCallback String This even gets emitted when the token has been aquired. You can then use this token to verify the user on your backend.

Development

# install dependencies
npm install

# serve with hot reload
npm run watch

# build demo page
npm run build:example

# build
npm run build

# publish to npm
npm version patch
npm publish

GitHub