Optimizely Content Delivery JavaScript SDK - Content Loader, Content Resolver and Site Loader

SDK for loading and resolving content from an Optimizely application running the Content Delivery API. The SDK is written in TypeScript and includes types.

Please visit Optimizely World for full documentation of the APIs.

> Note that this SDK requires you to use the flattened JSON format, see code example below how to configure the API to use this format.

``cs
services.AddContentDeliveryApi(options =>
{
options.FlattenPropertyModel = true;
});
`

Installing

Using npm:

`bash
$ npm install @episerver/content-delivery@latest
``

using yarn:

`bash
$ yarn install @episerver/content-delivery@latest
``

Examples

$3

Given we have imported the content loader and instantiated it:

`js
import { ContentLoader } from '@episerver/content-delivery';

const contentLoader = new ContentLoader();
`

The constructor takes a ContentDeliveryConfig object.

Loading content by an identifier:

`js
contentLoader.getContent('38963a25-b6ec-493b-aca4-f4fbce1aed4d')
.then((content) => {
// Content was successfully loaded
})
.catch((contentLoaderError) => {
console.error('Content not loaded', contentLoaderError.errorMessage);
});
`

The function takes an optional ContentRequest object where we can specify which language branch to load with the branch parameter:

`js
contentLoader.getContent('38963a25-b6ec-493b-aca4-f4fbce1aed4d', { branch: 'en' })
.then((content) => {
// Content was successfully loaded
});
`

We can specify which properties should be included in the response with the select parameter:

`js
contentLoader.getContent('38963a25-b6ec-493b-aca4-f4fbce1aed4d', { select: ['heading', 'body'] })
.then((content) => {
// Content was successfully loaded
});
`

We can specify which properties should be expanded in the response with the expand parameter:

`js
contentLoader.getContent('38963a25-b6ec-493b-aca4-f4fbce1aed4d', { expand: ['teasers'] })
.then((content) => {
// Content was successfully loaded
});
`

Reference properties (content areas and content references) only includes the reference to the content by default. By expanding these properties the content of the referenced content is also included in the response. See the Content API documentation for more information.

Loading children by a parent identifier:

`js
contentLoader.getChildren('38963a25-b6ec-493b-aca4-f4fbce1aed4d')
.then((children) => {
// Children was successfully loaded
});
`

The function takes an optional ContentCollectionRequest object. In addition to the ContentRequest parameters we can also limit the number of content items to load:

`js
contentLoader.getChildren('38963a25-b6ec-493b-aca4-f4fbce1aed4d', { top: 10 })
.then((collection) => {
// Children was successfully loaded
var children = collection.items;
var continuationToken = collection.continuationToken;
});
`

For loading the next set of content items, use the continuation token:

`js
contentLoader.getChildren('38963a25-b6ec-493b-aca4-f4fbce1aed4d', { continuationToken: continuationToken })
.then((collection) => {
// Children was successfully loaded
var children = collection.items;
// When we reached the last set, the continuation token won't be present.
var continuationToken = collection.continuationToken;
});
`

Note that the continuation token contains how many items that should be loaded, no need to provide the top parameter again.

Loading ancestors by an identifier:

`js
contentLoader.getAncestors('38963a25-b6ec-493b-aca4-f4fbce1aed4d')
.then((ancestors) => {
// Ancestors was successfully loaded
});
`

The function takes an optional ContentRequest object.

#### ContentRequest schema

`js
{
branch: 'en',
select: [''],
expand: [''],
}
`

#### ContentCollectionRequest schema

`js
{
branch: 'en',
select: [''],
expand: [''],
top: 0,
continuationToken: '',
}
`

#### ContentLoaderError schema

`js
{
data: {},
errorCode: 404,
errorMessage: '',
}
`

$3

Given we have imported the content resolver and instantiated it:

`js
import { ContentResolver } from '@episerver/content-delivery';

const contentResolver = new ContentResolver();
`

The constructor takes a ContentDeliveryConfig object.

Resolving content by an URL:

`js
contentResolver.resolveContent('https://site.com/en/page1/page2/doesnt-exist/', false)
.then((resolvedContent) => {
// Content was resolved. Note that the promise is fulfilled
// even though the content was not found. The return object contains a
// status property you can check.
var content = resolvedContent.content;
})
.catch((contentResolverError) => {
// Promise is only rejected if there was a service error.
console.error('Content not resolved', contentResolverError.errorMessage);
});
`

The second parameter, matchExact, defines whether the URL should be a partial or exact match. The remaining path of the URL, if a partial match, is available in remainingPath in the returned object, see ResolvedContent. The function also takes an optional ResolveContentRequest object.

#### ResolveContentRequest schema

`js
{
select: [''],
expand: [''],
}
`

#### ResolvedContent schema

`js
{
content: {},
branch: 'en',
status: 'UNKNOWN|RESOLVED|NOTFOUND|UNAUTHORIZED|ACCESSDENIED',
mode: 'DEFAULT|PREVIEW|EDIT',
remainingPath: 'doesnt-exist/',
siteId: '6ed7799f-efd8-4421-8eb3-c95bfbf7281d',
startPageId: 'ff2e86ae-27a9-4417-b503-ecb9c2fdd63b',
}
`

#### ContentResolverError schema

`js
{
errorMessage: '',
}
`

$3

Given we have imported the site loader and instantiated it:

`js
import { SiteLoader } from '@episerver/content-delivery';

const siteLoader = new SiteLoader();
`

The constructor takes a ContentDeliveryConfig object.

Loading site by an identifier:

`js
siteLoader.getSite('45872cd5-e63c-363e-caa4-35e6ab1ad6d4')
.then((site) => {
// Site was successfully loaded
})
.catch((siteLoaderError) => {
console.error('Site not loaded', siteLoaderError.errorMessage);
});
`

Loading all sites:

`js
siteLoader.getSites()
.then((sites) => {
// Sites was successfully listed
});
`

Configuration

#### ContentDeliveryConfig schema

`js
{
apiUrl: 'https://site.com/api/episerver/v2.0',
getAccessToken: function (path) {
// Return access token.
},
selectAllProperties: true,
expandAllProperties: false,
}
`

$3

The default configuration is combined with the configuration you pass in to the constructors of the content loader and resolver classes.

`js
import { defaultConfig } from '@episerver/content-delivery';

defaultConfig.apiUrl = 'https://site.com/api/episerver/v2.0';
defaultConfig.getAccessToken = () => authService.getAccessToken();
defaultConfig.selectAllProperties = true;
defaultConfig.expandAllProperties = true;
``