Contentful Example with Vanilla JS and HTML: Get Started Fast

Contentful is a headless CMS that allows you to manage your content in a flexible and scalable way. This means you can use it to power any type of application, from a simple website to a complex mobile app.

To get started with Contentful and vanilla JS, you'll need to create a new Contentful space. This can be done in just a few clicks, and it's a great opportunity to explore the Contentful interface.

With a Contentful space set up, you can start creating content using the Contentful web app. This is where you'll define your content model, add entries, and manage your content.

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To get started with Contentful, you'll need to install the Contentful JS SDK. This is a crucial step, as it will allow you to interact with your content in Contentful.

You'll also need to get credentials, which will grant you access to your content. This involves obtaining a CDA token, which will be used to authenticate your requests.

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To use the Contentful JS SDK with the Preview API, you'll need to follow the SDK's documentation and references. This will provide you with the necessary information to set up your project.

Before you begin, make sure you have a space and a CDA token. You should also have at least one content type with a rich text field and at least one entry of that content type.

Here's a quick checklist to ensure you're ready to start:

Contentful's Content Delivery API is a fantastic way to fetch content, and we're going to use the GraphQL API for this application because it's simple and efficient.

You can use the GraphQL API with JavaScript, cURL, Python, Ruby, or PHP, making it a versatile option.

To use the GraphQL API, head over to Contentful's GraphQL interface using the URL configured with your space ID and access token.

The GraphQL query is constructed from the automatically generated field names we defined when we set up our content type, such as querying a collection like microblogCollection with a property of items.

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The Content Delivery API is a powerful tool for fetching content, and Contentful offers a few ways to do it. One of them is the GraphQL API, which we're going to use in this application because it's a great way to request only the data we need for the front end.

We can use the GraphQL API with JavaScript, but if JavaScript isn't your thing, you can also use it with cURL, Python, Ruby, or PHP.

To construct our GraphQL query, we need to head over to Contentful's GraphQL interface using the URL configured with our space ID and access token.

The name of our content type (i.e., microblog) must be queried as a collection (e.g., microblogCollection) with a property of items.

We can also request some system information in our query, such as sys.firstPublishedAt, which is available in the automatically generated field names we defined when we set up our content type.

You can see your posts as unstyled HTML in the browser once you've constructed your query and made the API call.

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Live updates allow you to make changes in your editor and see the updates in real time.

The updates are only happening on the client-side and in the live preview environment of Contentful.

Note that transformations of Contentful response data are not currently supported.

This means that for live updates to work as intended, Contentful data must be kept in its original structure.

To use Contentful directly, you'll need to tag your HTML elements with the appropriate data attributes, specifically data-contentful-entry-id and data-contentful-field-id. This allows you to use the inspector mode to show an edit button in the preview.

You can also use the data-contentful-locale attribute to override the global locale from the init function. This is useful if you want to customize the locale for specific parts of your application.

The getProps() helper function can be used to retrieve the necessary properties for your Contentful integration.

You can use Contentful directly in the browser without any additional setup.

To do this, you can use a script tag to link to the built file.

Alternatively, you can download the built file from jsDelivr, located in the dist directory.

If you want to try a more browser-oriented example, check out the JSFiddle version of the Product Catalogue demo app.

This is a great way to get started with Contentful and see how it works in a real-world scenario.

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The power of Contentful lies in its ability to seamlessly integrate with your custom UI components. To open an entry in the Contentful live preview editor, you can use the ContentfulLivePreview.openEntryInEditor function.

This function allows you to manually control the editor opening process, providing flexibility for developers to integrate this action within custom UI components or events. You can target a specific field by providing its ID.

The function takes four parameters: fieldId, entryId, assetId, and locale. The fieldId is the ID of the field you want to target, while the entryId is the ID of the entry containing the field. The assetId is the ID of the asset containing the field, but it's not required. The locale is the locale of the content.

Here's a breakdown of the parameters:

This function requires React.js version 17 or higher.

If you're planning to support older browsers in your application, you can use the legacy version of the library, which includes a polyfill for Promises. This will help ensure that your app works as expected even in Internet Explorer 11 and other older browsers.

To use the legacy version, simply replace `contentful.browser.min.js` with `contentful.legacy.min.js` in your code.

If you're experiencing issues with the SDK, check out the troubleshooting section below for some common solutions.

Legacy browsers can be a challenge to support, but there are ways to make it easier.

You can use contentful.legacy.min.js to support Internet Explorer 11 and other older browsers. This version of the library already contains a polyfill for Promises.

Using the right library can make a big difference in how smoothly your application runs on older browsers.

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Troubleshooting can be a real pain, but don't worry, I've got some tips to help you out.

If you're getting the error "Unable to resolve module http", try requiring the browser version of the SDK like this: `const { createClient } = require('contentful/dist/contentful.browser.min.js')`. It's a simple fix, but it can make all the difference.

You can also use the Contentful SDK with TypeScript, which is a great choice if you're working with JavaScript. There's a type definition file available, so you can enjoy the benefits of TypeScript with your Contentful integration.

The Contentful SDK doesn't do any caching, so if you're experiencing issues, it's not because of caching. You can check the issue on GitHub for more information.

If you're using the live preview SDK inside an iframe, you might run into errors because it can't detect the host. To fix this, you need to define the `targetOrigin` manually in your init configuration.