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lite-recaptcha

v1.0.2

Published

Recaptcha Web Component

Downloads

5

Readme

Lite Recaptcha

Recaptcha Web Component. Also works with LitElement.

Usage

Module export LiteCaptcha class, and also define <lite-capthca> element.

import 'lite-recaptcha'
import { html } from 'lit-html'

class extends Whatever {
  //...

  render() {
    return html`
      <lite-captcha
        sitekey=${this.captchaSiteKey}
        hl=${this.lang}
        .onChange=${this.onChange}
        .onLoad=${this.onLoad}
      ></lite-captcha>
    `
  }
}

Api Reference

Props

  • sitekey: String. Required!
  • hl: String. By default recaptcha set by itself
  • size: normal || compact. Default: 'normal'
  • theme: light || dark. Default: 'light'
  • tabindex: Number. Default: 0

Callbacks

  • onChange: (token: String)=>{...}. Calls with token when captcha checked successfully. Calls with '' when captcha expired, rerendered, error or reset
  • onLoad: (loaded: Boolean)=>{...}. Calls with loaded = true after loading recaptcha script. Each time hl changes, the loading starts over (loaded = false).
  • successCallback: (token: String)=>{...}.
  • expiredCallback: function
  • errorCallback: function

Methods

  • reset(). Reset captcha and value

Events

  • change: e=>console.log(e.detail.value). Fire if onChange callback not provided. Works the same
  • load: e=>console.log(e.detail.value). Fire if onLoad callback not provided. Works the same

Example

Here is <captcha-input> example based on LitElement for lite-form

import { LitElement, html } from 'lit-element'
import compose from 'compose-function'
import { withField, withError } from 'lite-form'
import 'lite-recaptcha'

class CaptchaInput extends LitElement {
  createRenderRoot() {
    return this
  }

  static get properties() {
    return {
      name: { type: String },
      captchaSiteKey: { type: String },
      lang: { type: String },
      loaded: { type: Boolean },

      //touched and error comes from withError HOC
      touched: { type: Boolean },
      error: { type: String },
    }
  }

  constructor() {
    super()
    this.loaded = false
  }

  onLoad = value => {
    this.loaded = value
  }

  onChange = token => {
    // handleBlur and handleChange comes from withField HOC
    if (token) {
      this.handleBlur()
    }
    this.handleChange(token)
  }

  // Useful to reset from the outside
  reset() {
    const el = this.getElementsByTagName('lite-captcha')
    el[0] && el[0].reset()
  }

  render() {
    return html`<lite-captcha
        id="lite-captcha"
        sitekey=${this.captchaSiteKey}
        hl=${this.lang}
        .onChange=${this.onChange}
        .onLoad=${this.onLoad}
      ></lite-captcha>
      ${!this.loaded ? html`<p>loading...</p>` : null}
      ${html`<p>${this.error && this.touched ? this.error : null}</p> `}`
  }
}

const enhance = compose(withField, withError)

customElements.define('captcha-input', enhance(CaptchaInput))