dfp-examples

Examples about how to implement DFP (DoubleClick for Publishers) by using Vanilla Javascript, React, Vue and AMP.

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Vanilla Javascript

Javascript example

We can generate the script in DFP console (admanager).

1. go to inventory > Ad units > Select the ad unit
2. click GENERATE TAGS

The scripts including three steps which list as below:

1. load gpt (Google Publisher Tag) script

<script
  async="async"
  src="https://www.googletagservices.com/tag/js/gpt.js"
></script>

2. define ad slot

<script>
  var googletag = googletag || {};
  googletag.cmd = googletag.cmd || [];
</script>
<script>
  googletag.cmd.push(function() {
    googletag
      .defineSlot(
        '/21737763597/adunit-1',
        [320, 100],
        'div-gpt-ad-1559997122392-0',
      )
      .addService(googletag.pubads());
    googletag.pubads().enableSingleRequest();
    googletag.enableServices();
  });
</script>

3. render ad element and display ad

<div id="div-gpt-ad-1559997122392-0" style="height:100px; width:320px;">
  <script>
    googletag.cmd.push(function() {
      googletag.display('div-gpt-ad-1559997122392-0');
    });
  </script>
</div>

AMP

AMP example

implement DFP in AMP is pretty easy, just use amp-ad as below:

1. import amp-ad component

<script
  async
  custom-element="amp-ad"
  src="https://cdn.ampproject.org/v0/amp-ad-0.1.js"
></script>

2. add ad element

<amp-ad
  width="320"
  height="100"
  type="doubleclick"
  data-slot="/21737763597/adunit-1"
>
</amp-ad>

But some DFP formats are not supported in AMP

• Interstitials
• Flash
• Creatives served over HTTP.

React.js

React example

Using DFP in React, just follow the three steps in vanilla javascript - load gpt script, define ad slot, render ad element and display ad.
Here we use React hook to implement DFP. If you aren't familiar with hook, check the document here.

1. load gpt script

<!-- @public/index.html -->
<script
  async="async"
  src="https://www.googletagservices.com/tag/js/gpt.js"
></script>

2. Create a custom hook to define and display ad slot

// @src/useDfpSlot.js
const useDfpSlot = ({ path, size, id }) => {
  useEffect(() => {
    const googletag = window.googletag || {};

    googletag.cmd = googletag.cmd || [];
    googletag.cmd.push(function() {
      googletag.defineSlot(path, size, id).addService(googletag.pubads());
      googletag.pubads().enableSingleRequest();
      googletag.enableServices();
    });

    googletag.cmd.push(function() {
      googletag.display(id);
    });
  }, [path, size, id]);
};

3. render ad element

// @src/App.js
const App = () => {
  useDfpSlot({
    path: '/21737763597/adunit-1',
    size: [320, 100],
    id: 'div-gpt-ad-1559997122392-0',
  });

  return (
    <div
      id="div-gpt-ad-1559997122392-0"
      style={{ width: '320px', height: '100px' }}
    />
  );
};

Vue.js

Vue example

Because we don't have hook in Vue.js yet, so here we use component lifecycle hooks to handle DFP.

1. load gpt script

<!-- @public/index.html -->
<script
  async="async"
  src="https://www.googletagservices.com/tag/js/gpt.js"
></script>
<script type="text/javascript">
  window.googletag = window.googletag || {};
  window.googletag.cmd = window.googletag.cmd || [];
</script>

2. render ad element, define and display ad slot in mounted hook
   PS. destroySlots at beforeCreate hook to prevent define duplicate adUnit during hot reload

<!-- @src/components/DfpSlot.vue -->
<template>
  <div :id="id"></div>
</template>

<script>
  export default {
    name: 'DfpSlot',
    props: {
      size: Array,
      path: String,
      id: String,
    },
    beforeCreate() {
      window.googletag.cmd.push(() => {
        window.googletag.destroySlots();
      });
    },
    mounted() {
      const { path, size, id } = this;
      window.googletag.cmd.push(() => {
        window.googletag
          .defineSlot(path, size, id)
          .addService(window.googletag.pubads());
        window.googletag.pubads().enableSingleRequest();
        window.googletag.enableServices();
        window.googletag.display(id);
      });
    },
  };
</script>

3. apply DfpSlot component

<dfp-slot
  path="/21737763597/adunit-1"
  :size="[320, 100]"
  id="div-gpt-ad-1559997122392-0"
/>

---

GPT API

Here is the GPT API we have used in our examples. For more information please reference the document.

API
googletag.cmd	Reference to the global command queue for asynchronous execution of GPT-related calls.
googletag.defineSlot(path, size, [div])	Constructs an ad slot with a given ad unit path and size and associates it with the ID of a div element on the page that will contain the ad.
googletag.enableServices()	Enables all GPT services that have been defined for ad slots on the page.
googletag.pubads()	Returns a reference to the pubads service.
googletag.display(divOrSlot)	Instructs slot services to render the slot.
googletag.destroySlots([slots])	Destroys the given slots, removing all related objects and references of those slots from GPT.

---

Reference

DFP official document

• DFP console: admanager
• element in admanager
• Avoiding Common mistakes

AMP component for DFP

• amp-ad doubleclick

DFP in Vue.js

• Google Publisher Tag for DFP in a Vue.js Single-Page Application