Performant & GDPR-friendly Iframe Embed JavaScript Library - iframemanager

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Author:	orestbida
Views Total:	129 views
Official Page:	Go to website
Last Update:	April 21, 2023
License:	MIT

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Performant & GDPR-friendly Iframe Embed JavaScript Library – iframemanager

Description:

A lightweight, GDPR-compliant iframe manager that delays the loading of iframe content (like Youtube videos) until you agree to certain Privacy Policy and Terms.

More Features:

Auto resize the iframe to fit its container.
Custom thumbnail before loading the iframe content.
Supports any service which uses iframes: Youtube, Vimeo, Twitch, etc.
Easy to integrate with any cookie consent solution.
Lazily load iframes & thumbnails to improve page speed.

How to use it:

1. Load the iframemanager’s JavaScript and Stylesheet in the document.

<link rel="stylesheet" href="dist/iframemanager.css" />
<script src="dist/iframemanager.js"></script>

2. Initialize the iframe manager.

var manager = iframemanager();

3. Add services to the iframe manager.

iframemanager.run({
  services : {
    // Youtube
    youtube : {
      embedUrl: 'https://www.youtube-nocookie.com/embed/{data-id}',
      iframe : {
        allow : 'accelerometer; encrypted-media; gyroscope; picture-in-picture; fullscreen;',
      },
      cookie : {            
        name : 'cc_youtube'
      },
      languages : {
        'en' : {
          notice: 'This content is hosted by a third party. By showing the external content you accept the <a rel="noreferrer" href="https://www.youtube.com/t/terms" title="Terms and conditions" target="_blank">terms and conditions</a> of youtube.com.',
          loadBtn: 'Load video',
          loadAllBtn: 'Don\'t ask again'
        }
      }
    },
    // Vimeo
    vimeo: {
      embedUrl: 'https://player.vimeo.com/video/{data-id}',
      iframe: {
        allow : 'fullscreen; picture-in-picture, allowfullscreen;',
      },
      thumbnailUrl: async (dataId, setThumbnail) => {
        const url = `https://vimeo.com/api/v2/video/${dataId}.json`;
        const response = await (await fetch(url)).json();
        const thumbnailUrl = response[0]?.thumbnail_large;
        thumbnailUrl && setThumbnail(thumbnailUrl);
      },
      languages: {
        en: {
          notice: 'This content is hosted by a third party. By showing the external content you accept the <a rel="noreferrer noopener" href="https://vimeo.com/terms" target="_blank">terms and conditions</a> of vimeo.com.',
          loadBtn: 'Load video',
          loadAllBtn: "Don't ask again"
        }
      }
    },
    // Daily Motion
    dailymotion : {
      embedUrl: 'https://www.dailymotion.com/embed/video/{data-id}',
      // Use dailymotion api to obtain thumbnail
      thumbnailUrl: function(id, callback){
        var url = "https://api.dailymotion.com/video/" + id + "?fields=thumbnail_large_url";
        var xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function() {
          if (this.readyState == 4 && this.status == 200) {
            var src = JSON.parse(this.response).thumbnail_large_url;
            callback(src);
          }
        };
        xhttp.open("GET", url, true);
        xhttp.send();
      },
      iframe : {
        allow : 'accelerometer; encrypted-media; gyroscope; picture-in-picture; fullscreen;'
      },
      cookie : {            
        name : 'cc_dailymotion'
      },
      languages : {
        'en' : {
          notice: 'This content is hosted by a third party. By showing the external content you accept the <a rel="noreferrer" href="#link_dailymotion" title="Terms and conditions" target="_blank">terms and conditions</a> of dailymotion.com.',
          loadBtn: 'Load video',
          loadAllBtn: 'Don\'t ask again'
          
        }
      }
    },
    // Google maps
    googlemaps: {
      embedUrl: 'https://www.google.com/maps/embed/v1/place?key=API_KEY&q={data-id}',
      iframe: {
        allow: 'picture-in-picture; fullscreen;'
      },
      languages: {
        en: {
          notice: 'This content is hosted by a third party. By showing the external content you accept the <a rel="noreferrer noopener" href="https://cloud.google.com/maps-platform/terms" target="_blank">terms and conditions</a> of Google Maps.',
          loadBtn: 'Load map',
          loadAllBtn: "Don't ask again"
        }
      }
    },
    // Twitch
    "twitch" : {
      embedUrl: 'https://player.twitch.tv/?{data-id}&parent=localhost',
      iframe : {
        allow : 'accelerometer; encrypted-media; gyroscope; picture-in-picture; fullscreen;',
        params: '',// optional
      },
      cookie : {            
        name : 'cc_twitch'
      },
      languages : {
        'en' : {
          notice: 'This content is hosted by a third party. By showing the external content you accept the <a rel="noreferrer" href="#link_twitch" title="Terms and conditions" target="_blank">terms and conditions</a> of twitch.com.',
          loadBtn: 'Load stream',
          loadAllBtn: 'Don\'t ask again'
        }
      }
    }
  }
});

4. Create a DIV container to hold the iframe manager and config the iframe content with the following data attributes:

data-service: Service name
data-id: Video ID
data-params: Additional parameters
data-thumbnail: Path to the thumbnail image
data-thumbnailpreload: Determine whether to preload the thumbnail image
data-autoscale: Determine whether to auto resize the iframe content
data-ratio: Custom ratio: 1:1, 2:1, 3:2, 5:2, 4:3, 16:9, 16:10, 20:9, 21:9, 9:16, 9:20
data-widget: Ignore the default aspect ratio; specify when implementing a custom widget with explicit width and height
data-iframe-id: Iframe ID attribute
data-iframe-loading: Iframe loading attribute
data-iframe-frameborder: Iframe border attribute

<div data-service="youtube"
     data-id="VIDEO ID"
     data-params="start=21&mute=1"
     data-thumbnail="/path/to/poster.jpg"
     data-thumbnailpreload
     data-autoscale >
</div>

5. Available configuration options.

iframemanager.run({
  currLang: 'en', 
  autoLang: false, 
  services : {
    myservice : {
      embedUrl: 'https://myservice_embed_url>/{data-id}',
      // set valid url for automatic thumbnails   [OPTIONAL]
      thumbnailUrl: 'https://<myservice_embed_thumbnail_url>/{data-id}',  
      // global iframe settings (apply to all iframes relative to current service) [OPTIONAL]
        iframe : {
          allow : 'fullscreen', 
          params : 'mute=1&start=21'
          // function run for each iframe configured with current service
          onload : function(data_id, callback){
            console.log("loaded iframe with data-id=" + data_id);
          }
        },
        // cookie is set if the current service is accepted
        cookie : {
          name : 'cc_youtube',
          path : '/',
          samesite : 'lax', 
          domain : location.hostname
        },
        languages : {
          en : {
            notice: 'Html <b>notice</b> message',
            loadBtn: 'Load video',
            loadAllBtn: 'Don\'t ask again'
          }
        }
    },
      anotherservice : {
          ...
      }
    }
});

6. API methods.

// accept specific service
manager.acceptService('youtube');
// accept all services
manager.acceptService('all');
// reject specific service
manager.rejectService('youtube');
// reject all services
manager.rejectService('all');
// get the entire config object
manager.getConfig();
// get the current state (enabled/disabled services)
manager.getState();

7. Add a custom widget.

<div
  data-service="twitter"
  data-widget
  style="width: 300px; height: 501px"
>
  <div data-placeholder>
    <blockquote class="twitter-tweet"><p lang="en" dir="ltr">Sunsets don&#39;t get much better than this one over <a href="https://twitter.com/GrandTetonNPS?ref_src=twsrc%5Etfw">@GrandTetonNPS</a>. <a href="https://twitter.com/hashtag/nature?src=hash&amp;ref_src=twsrc%5Etfw">#nature</a> <a href="https://twitter.com/hashtag/sunset?src=hash&amp;ref_src=twsrc%5Etfw">#sunset</a> <a href="http://t.co/YuKy2rcjyU">pic.twitter.com/YuKy2rcjyU</a></p>&mdash; US Department of the Interior (@Interior) <a href="https://twitter.com/Interior/status/463440424141459456?ref_src=twsrc%5Etfw">May 5, 2014</a></blockquote>
  </div>
</div>

manager.run({
  services: {
    twitter: {
      onAccept: async (div, setIframe) => {
        // Using cookieconsent v3
        await CookieConsent.loadScript('https://platform.twitter.com/widgets.js');
        // Make sure the "window.twttr" property exists
        await im.childExists({childProperty: 'twttr'}) && await twttr.widgets.load(div);
        // Make sure the "iframe" element exists
        await im.childExists({parent: div}) && setIframe(div.querySelector('iframe'));
      },
      onReject: (iframe) => {
          iframe && iframe.parentElement.remove();
      }
    }
  }
})

Changelog:

v1.2.5 (05/21/2023)

Fix issue with visibility in v1.2.4 where buttons/links remain clickable despite notice being hidden

v1.2.4 (05/20/2023)

Fix compatibility issues with Safari 10-13
Use em/rem units instead of px

v1.2.3 (04/03/2023)

Fix iframes outside viewport are not reset via rejectService(‘<specific_service>’)

v1.2.2 (03/31/2023)

Fix uncaught exception when service div is no longer present

v1.2.1 (02/08/2023)

Bugfixes

v1.2.0 (01/19/2023)

Add .getState() to retrieve the current state such as accepted/rejected services
Add .getConfig() to retrieve any config. value/prop.
Add onChange callback, executed whenever a service’s state is changed
Add support for custom widgets generated by external API (twitter, facebook, instagram …)
Add css variables for easier customization
Improve support for custom placeholders when javascript is not enabled
Make buttons optional (you can now have 0, 1 or 2 buttons)
Use service name as default cookie name if no explicit cookie.name is provided: ‘im_<service>’
Bug Fixes

v1.1.0 (11/15/2022)

Add support for custom aspect ratios via data-ratio=”x:y” 8680851
Allow any attribute on the iframe element via data-iframe-<attribute>
Allow any attribute on the iframe element via the internal iframe object
Bugfixes

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