Activate inert HTML after a true Cookie Consent opt-in

cookie_consent_opt_in.js

/**
 * This script runs the Insites Cookie Consent script
 * https://cookieconsent.insites.com/
 *
 * third-party cookies are contained within a <template> tag, which is inert.
 * when users opt in, the contents of the template are activated.
 *
 * There is no realistic way to unset cookies set after opt-in.
 * The user will have to purge cookies manually.
 *
 * MIT licensed by Joost Baaij, Space Babies: www.spacebabies.nl
 */
var cookieConsent = (function() {
  var handlers = {
    initialise: function(status) {
      var type = this.options.type
      if (type === 'opt-in' && status === 'allow') {
        activateTemplate('#cookieConsent')
      }
    },

    statusChange: function(status, chosenBefore) {
      var type = this.options.type
      if (type == 'opt-in' && status === 'allow') {
        activateTemplate('#cookieConsent')
      }
    }
  }

  var options = {
    "palette": {
      "popup": {
        "background": "#715ea1"
      },
      "button": {
        "background": "#ae9ae0"
      }
    },
    "theme": "edgeless",
    "type": "opt-in",
    "content": {
      "message": "Wij gebruiken cookies om u een zo compleet mogelijke service aan te kunnen bieden. Door hiermee akkoord te gaan weet u zeker dat de website optimaal werkt.",
      "dismiss": "Ik wil geen cookies",
      "allow": "Sta cookies toe",
      "deny": "Afwijzen",
      "link": "Meer informatie",
      "href": "http://www.blitts.nl/36/support/cookie-beleid.html"
    },
    onInitialise: handlers.initialise,
    onStatusChange: handlers.statusChange
  }

  // does the browser support <template>? (all but legacy IE)
  function supportsTemplate() {
    return 'content' in document.createElement('template')
  }

  function activateTemplate(selector) {
    if (supportsTemplate) {
      var content = document.querySelector(selector).content
      var clone = document.importNode(content, true)
      document.body.appendChild(clone)
    }
  }

  function initialise() {
    window.addEventListener("load", function() {
      window.cookieconsent.initialise(options)
    })
  }

  return {
    activateTemplate: initialise
  }
})()

cookieConsent.activateTemplate()