[![npm version](https://badge.fury.io/js/%40kentico%2Fkontent-delivery.svg)](https://badge.fury.io/js/%40kentico%2Fkontent-delivery) [![Build](https://github.com/Kentico/kontent-delivery-sdk-js/actions/workflows/test.yml/badge.svg)](https://github.com/Kentico/kontent-delivery-sdk-js/actions/workflows/test.yml) [![CircleCI](https://circleci.com/gh/Kentico/kontent-delivery-sdk-js/tree/master.svg?style=svg)](https://circleci.com/gh/Kentico/kontent-delivery-sdk-js/tree/master) [![npm](https://img.shields.io/npm/dt/@kentico/kontent-delivery.svg)](https://www.npmjs.com/package/@kentico/kontent-delivery) [![Known Vulnerabilities](https://snyk.io/test/github/Kentico/kontent-delivery-sdk-js/badge.svg)](https://snyk.io/test/github/kentico/kontent-delivery-sdk-js) [![GitHub license](https://img.shields.io/github/license/Kentico/kontent-delivery-sdk-js.svg)](https://github.com/Kentico/kontent-delivery-sdk-js) ![Gzip browser bundle](https://img.badgesize.io/https://cdn.jsdelivr.net/npm/@kentico/kontent-delivery/_bundles/kontent-delivery.browser.umd.min.js?compression=gzip) [![](https://data.jsdelivr.com/v1/package/npm/@kentico/kontent-delivery/badge)](https://www.jsdelivr.com/package/npm/kentico-kotent-delivery) [![Discord](https://img.shields.io/discord/821885171984891914?label=Discord&logo=Discord&logoColor=white)](https://discord.gg/SKCxwPtevJ) # JavaScript Delivery SDK Documentation JavaScript Delivery SDK is a client library for retrieving data from [Kontent by Kentico](https://kontent.ai/). Works both in browser & node.js environments. # Kontent Delivery SDK ## Installation You can install this library using `npm` or you can use global CDNs such `jsdelivr`. ### npm ``` npm i @kentico/kontent-delivery --save ``` ### UMD Bundles When using UMD bundle and including this library in `script` tag on your `html` page, you can find it under the `kontentDelivery` global variable. Bundles are distributed in `dist/_bundles` folder: - `dist/_bundles/kontent-delivery.umd.js` - `dist/_bundles/kontent-delivery.umd.min.js` #### CDN ##### kontent-delivery.umd.js ![Gzip UMD bundle](https://img.badgesize.io/https://cdn.jsdelivr.net/npm/@kentico/kontent-delivery@11.0.0/dist/bundles/kontent-delivery.umd.js?compression=gzip) ``` https://cdn.jsdelivr.net/npm/@kentico/kontent-delivery@11.0.0/dist/bundles/kontent-delivery.umd.js ``` ##### kontent-delivery.umd.min.js ![Gzip UMD Minified bundle](https://img.badgesize.io/https://cdn.jsdelivr.net/npm/@kentico/kontent-delivery@11.0.0/dist/bundles/kontent-delivery.umd.min.js?compression=gzip) ``` https://cdn.jsdelivr.net/npm/@kentico/kontent-delivery@11.0.0/dist/bundles/kontent-delivery.umd.min.js ``` ## TypeScript & ES6 ```typescript import { IContentItem, Elements, createDeliveryClient } from '@kentico/kontent-delivery'; /** * Defining models is optional, but will greatly benefit development * experience & further maintenance of your code */ export type Movie = IContentItem<{ title: Elements.TextElement; plot: Elements.RichTextElement; released: Elements.DateTimeElement; length: Elements.NumberElement; poster: Elements.AssetsElement; category: Elements.MultipleChoiceElement; stars: Elements.LinkedItemsElement; seoname: Elements.UrlSlugElement; releaseCategory: Elements.TaxonomyElement; }>; // initialize delivery client const deliveryClient = createDeliveryClient({ projectId: '' }); // fetch items const response = await deliveryClient.items().type('').toPromise(); // read data of first item const movieText = response.data.items[0].title.value; ``` ## JavaScript & CommonJS ```javascript const KontentDelivery = require('@kentico/kontent-delivery'); // initialize delivery client const deliveryClient = KontentDelivery.createDeliveryClient({ projectId: '', }); // fetch items const response = await deliveryClient.items() .type('') .toPromise(); // read data of first item const movieText = response.data.items[0].title.value; ``` ## HTML & UMD & CDN ```html Kontent SDK - Html sample

See console

``` ## SDK Documentation ## Client configuration Following is a list of configuration options for DeliveryClient (`IDeliveryClientConfig`): | Property | type | description | | ------------------- | :--------------------------------------: |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | projectId | string | ProjectId of your Kontent project | | elementResolver? | ElementResolver | Element resolver used to map custom elements | | previewApiKey? | string | Preview API key used to get unpublished content items | | defaultLanguage? | string | Sets default language that will be used for all queries unless overriden with query parameters | | proxy? | IDeliveryClientProxyConfig | Can be used to configure custom URLs. Useful when you use reverse proxy or have a need to transform URL - e.g. to remove 'projectId' | | secureApiKey? | string | Secured API key: Use secured API only when running on Node.JS server, otherwise you can expose your key | | defaultQueryConfig? | IQueryConfig | Default configuration for all queries. Can be overriden by indidividual queries | | httpService ? | IHttpService | Can be used to inject custom http service for performing requests | | globalHeaders? | (queryConfig: IQueryConfig) => IHeader[] | Adds ability to add extra headers to each http request | | retryStrategy? | IRetryStrategyOptions | Retry strategy configuration | | linkedItemsReferenceHandler? | LinkedItemsReferenceHandler | Indicates if content items are automatically mapped. Available values: 'map' or 'ignore' | | propertyNameResolver? | PropertyNameResolver | Used to map properties. Choose one of following default resolvers: `snakeCasePropertyNameResolver`, `pascalCasePropertyNameResolver` & `camelCasePropertyNameResolver` or create your own PropertyNameResolver function | | assetsDomain? | string | Custom domain for assets. Changes url of assets in both asset & rich text elements | | defaultRenditionPreset? | string | Codename of rendition preset to be applied by default to the base asset URL path when present. When set, the SDK will provide the URL of customized images by default. Right now the only supported preset codename is `default`. | ### Create typed models > Recommended:Use the [Kontent Model Generator](https://www.npmjs.com/package/@kentico/kontent-model-generator) to automatically > generate TypeScript models based on the content types in your Kontent project. You may define optional models in Typescript representing your actual data defined in Kontent projects. You can also auto-generate these models (see below). ```typescript import { IContentItem, Elements } from '@kentico/kontent-delivery'; export type Movie = IContentItem<{ title: Elements.TextElement; plot: Elements.RichTextElement; released: Elements.DateTimeElement; length: Elements.NumberElement; poster: Elements.AssetsElement; category: Elements.MultipleChoiceElement; stars: Elements.LinkedItemsElement; seoname: Elements.UrlSlugElement; releaseCategory: Elements.TaxonomyElement; }>; ``` ### Fetch data To get multiple content items, use the `items` method. You can specify the content type with the `type` method: ```typescript deliveryClient.items().type('typeCodename').toPromise(); deliveryClient.item('itemCodename').toPromise(); ``` Supported elements: `TextElement`, `MultipleChoiceElement`, `DateTimeElement`, `RichTextElement`, `NumberElement`, `AssetsElement`, `UrlSlugElement`, `TaxonomyElement`, `LinkedItemsElement` and `CustomElement`. Additionally you might also get `UknownElement` or custom model if you register it for your custom elements. #### Use custom models for Custom elements You can register an `ElementResolver` to map custom elements into dedicated element models and work with data more effectively. For example, if you have a custom `color` element in your Kontent project with json data like: ```json "color": { "type": "custom", "name": "Color", "value": "{\"red\":167,\"green\":96,\"blue\":197}" } ``` You can create a `ColorElement` type with strongly typed properties for `red`, `green` & `blue` values that you will parse from the json. ```typescript import { ElementModels, Elements, createDeliveryClient } from '@kentico/kontent-delivery'; type ColorElement = Elements.CustomElement<{ red: number; green: number; blue: number; }>; ``` To resolve your custom element into `ColorElement`, use the `ElementResolver` in your dleivery client config: ```typescript const client = createDeliveryClient({ projectId: '', elementResolver: (elementWrapper) => { if (elementWrapper.rawElement.type === 'color') { const parsed = JSON.parse(elementWrapper.rawElement.value); return { red: parsed.red, green: parsed.green, blue: parsed.blue }; } return undefined; } }); ``` You can then use this custom element type in your models: ```typescript type Movie = IContentItem<{ color: ColorElement; title: Elements.TextElement; }>; ``` ### Query parameters The SDK supports the following query parameters: `depthParameter`, `elementsParameter`, `limitParameter`, `orderParameter`, `skipParameter` and `languageParameter`. For more information about the parameters, see the [SDK query methods](#filter-content) below. You can also head over to [Delivery API reference](https://kontent.ai/learn/reference/delivery-api#tag/Filtering-content). ```typescript // Gets 5 items based on the Movie type deliveryClient.items().type('movie').limitParameter(5).skipParameter(2).toPromise(); ``` #### Filter content This example returns all **Movie** content items whose **title** element is equal to **Warrior**. Filters are also considered query parameters and can be combined. See [Content filtering in API reference](https://kontent.ai/learn/reference/delivery-api#tag/Filtering-content) for more general examples. Supported filters: `type`, `types`, `allFilter`, `anyFilter`, `containsFilter`, `equalsFilter`, `greaterThanFilter`, `greaterThanOrEqualFilter`, `infilter`, `lessThanFilter`, `lessThanOrEqualFilter`, `rangeFilter`, `emptyFilter`, `notEmptyFilter`, `notEqualsFilter`, `NotInFilter`. ```typescript // Gets items based on the Movie type with 'Warrior' in their 'Title' element deliveryClient.items().type('movie').equalsFilter('elements.title', 'Warrior').toPromise(); ``` ##### Filtering methods | Filter | Description | | ------------------------ | ------------------------------------------------------------------------------------- | | type | Retrieve only content items based on the given type. | | types | Retrieve only content items based on the given types. | | allFilte | Element with an array of values contains the specified list of values. | | anyFilter | Element with an array of values contains any value from the specified list of values. | | containsFilter | Element with an array of values contains the specified value. | | equalsFilter | Element value is the same as the specified value | | greaterThanFilter | Element value is greater than the specified value. | | greaterThanOrEqualFilter | Element value is greater than or equals the specified value. | | infilter | Element value is in the specified list of values. | | lessThanFilter | Element value is less than the specified value. | | lessThanOrEqualFilter | Element value is less than or equals the specified value | | rangeFilter | Element value falls in the specified range of two values, both inclusive. | | emptyFilter | Property value is empty. | | NotEmptyFilter | Property value is not empty. | | notEqualsFilter | Property value does not equal the specified value. | | notInFilter | Property value is not in the specified list of values. | #### Sort content You can sort data by using any of following methods: ```typescript deliveryClient.items().type('movie').orderByDescending('elements.title').toPromise(); ``` ```typescript deliveryClient.items().type('movie').orderByAscending('elements.title').toPromise(); ``` ```typescript deliveryClient.items().type('movie').orderParameter('elements.title', 'desc').toPromise(); ``` ### Execute queries with custom URL When you have an URL (i.e. for `next page` in paging, for testing purposes or just if you prefer to build it on your own) and still want to leverage SDK functionality such as type mapping, property resolving etc., use `withUrl` parameter on any query such as: ```typescript deliveryClient .items() .withUrl('https://deliver.kontent.ai/da5abe9f-fdad-4168-97cd-b3464be2ccb9/items?system.type=movie') .toPromise(); ``` ### Custom parameters In case you need to use custom parameters to build up an URL, use `withParameter` method: ```typescript deliveryClient.items().withParameter('name', 'value').toPromise(); ``` ### Get localized items You can specify [language of items](https://kontent.ai/learn/tutorials/manage-kontent/projects/set-up-languages) with `languageParameter` of a particular query. You can also define default language that will be used if `languageParameter` is not used during the initialization of delivery client. ```typescript import { createDeliveryClient } from '@kentico/kontent-delivery'; var deliveryClient = new createDeliveryClient({ projectId: '', defaultLanguage: 'es' }); // Gets items in 'es' language because it is marked as default deliveryClient.item('warrior').toPromise(); // Gets items in 'en' language because language parameter has priority over the default one deliveryClient.item('warrior').languageParameter(`en`).toPromise(); ``` ### Property name resolvers Kontent element codenames are always in **lowercase** and use **underscore** as a replacement for special characters. Using underscores might not be what you want to use in your code. Maybe you want to use `camelCase`, which is exactly what you can do by registering a `propertyNameResolver`. The following example converts `first_name` element name to `firstName`. ```typescript import { ContentItem, Elements, createDeliveryClient } from '@kentico/kontent-delivery'; type Actor = IContentItem<{ firstName: Elements.TextElement; }>; const deliveryClient = createDeliveryClient({ projectId: ''; propertyNameResolver: (contentType, element) => { if (element === 'first_name') { return 'firstName'; } return element; } }); ``` Rather then registering all elements manually, you can also use one of the built-in property name resolvers: `snakeCasePropertyNameResolver`, `pascalCasePropertyNameResolver` & `camelCasePropertyNameResolver` ```typescript import { createDeliveryClient, snakeCasePropertyNameResolver, pascalCasePropertyNameResolver, camelCasePropertyNameResolver } from '@kentico/kontent-delivery'; const deliveryClient = createDeliveryClient({ projectId: ''; propertyNameResolver: camelCasePropertyNameResolver, // propertyNameResolver: snakeCasePropertyNameResolver, // propertyNameResolver: pascalCasePropertyNameResolver, }); ``` ### Preview mode You can enable the preview mode either globally (when [initializing the DeliveryClient](#how-to-use-deliveryclient)) or per query. In each case, you need to set `previewApiKey` in the delivery client global configuration. #### Enable preview mode globally ```typescript import { createDeliveryClient } from '@kentico/kontent-delivery'; const deliveryClient = createDeliveryClient({ projectId: ''; previewApiKey: '', defaultQueryConfig: { usePreviewMode: true } }); ``` #### Enable preview mode per query ```typescript deliveryClient .items() .queryConfig({ usePreviewMode: true }) .toPromise(); ``` ### Secure Delivery API Using the Delivery API with [secure access](https://kontent.ai/learn/tutorials/develop-apps/build-strong-foundation/restrict-public-access) enabled is recommend only when the request is not being executed on the client (browser) because otherwise you will expose the API key publicly. ```typescript import { createDeliveryClient } from '@kentico/kontent-delivery'; const deliveryClient = createDeliveryClient({ projectId: ''; secureApiKey: '', defaultQueryConfig: { // Enabled secure access for all queries useSecuredMode: true } }); ``` As with [preview mode](#preview-mode), you can also override global settings on query level. ```typescript deliveryClient .items() .queryConfig({ // Enables secure access only for this query useSecuredMode: true }) .toPromise(); ``` ### Image transformation Use `ImageUrlBuilder` for your [image transformations](https://kontent.ai/learn/reference/image-transformation) on asset URLs. ```typescript import { transformImageUrl } from '@kentico/kontent-delivery'; // Sample asset URL; You'll find URLs like these in asset and rich text elements const assetUrl = `https://assets.kenticocloud.com:443/da5abe9f-fdad-4168-97cd-b3464be2ccb9/22504ba8-2075-48fa-9d4f-8fce3de1754a/warrior.jpg`; const transformedUrl = transformImageUrl(assetUrl) .withDpr(2) .withCompression('lossless') .withQuality(4) .withHeight(200) .withWidth(100) .getUrl(); ``` ### Paging All listing queries support automatic paging. To use automatic paging, use `toAllPromise` extension method: ```typescript // this executed multiple HTTP requests until it gets all items const response = await deliveryClient.items().limitParameter(5).toAllPromise(); ``` Alternatively, you may also specify maximum number of pages you want to get: ```typescript // only gets 3 page at maximum const response = await deliveryClient.items().limitParameter(5).toAllPromise({ pages: 3 }); ``` ### Resolving rich text elements [Rich text elements](https://kontent.ai/learn/reference/delivery-api#section/Rich-text-element) in Kontent by Kentico may contain linked items and components. For example, if you write a blog post, you might want to insert a video or testimonial to a specific place in your article. You need to define how these objects resolve to the HTML that will be rendered. This SDK provides you with few resolvers that help you to transform the input HTML to your desired HTML, JSON or object. Built-in resolvers provided by SDK: Resolver | Description | Usage --- | --- | --- | `RichTextHtmlResolver` | Tranforms rich text HTML by replacing linked items, links or images with custom HTML | `createRichTextHtmlResolver().resolveRichText(data)` `RichTextJsonResolver` | Tranforms rich text HTML into JSON | `createRichTextJsonResolver().resolveRichText(data)` `RichTextObjectResolver` | Tranforms rich text HTML into javascript Object | `createRichTextObjectResolver().resolveRichText(data)` `AsyncRichTextHtmlResolver` | Async version of `RichTextHtmlResolver` | `await createAsyncRichTextHtmlResolver().resolveRichTextAsync(data)` #### Example use of RichTextHtmlResolver ```typescript import { createRichTextHtmlResolver, createDeliveryClient, linkedItemsHelper } from '@kentico/kontent-delivery'; export type Movie = IContentItem<{ plot: Elements.RichTextElement; }>; export type Actor = IContentItem<{ firstName: Elements.RichTextElement; }>; // get content item with rich text element const response = (await createDeliveryClient({ projectId: '' }).item('itemCodename').toPromise()).data; // get rich text element const richTextElement = response.item.plot; // resolve HTML const resolvedRichText = createRichTextHtmlResolver().resolveRichText({ element: richTextElement, linkedItems: linkedItemsHelper.convertLinkedItemsToArray(response.linkedItems), imageResolver: (imageId, image) => { return { imageHtml: `

`, // alternatively you may return just url imageUrl: 'customUrl' }; }, urlResolver: (linkId, linkText, link) => { return { linkHtml: `${link?.link?.urlSlug}`, // alternatively you may return just url linkUrl: 'customUrl' }; }, contentItemResolver: (itemId, contentItem) => { if (contentItem && contentItem.system.type === 'actor') { const actor = contentItem as Actor; return { contentItemHtml: `

${actor.elements.firstName.value}

` }; } return { contentItemHtml: '' }; } }); const resolvedHtml = resolvedRichText.html; ``` #### Example use of RichTextJsonResolver ```typescript import { createRichTextHtmlResolver, createDeliveryClient, linkedItemsHelper } from '@kentico/kontent-delivery'; // get content item with rich text element const response = (await createDeliveryClient({ projectId: '' }).item('itemCodename').toPromise()).data; // get rich text element const richTextElement = response.item.plot; // transform rich text html into json const json = createRichTextJsonResolver().resolveRichText({ element: response.item.elements.plot, linkedItems: linkedItemsHelper.convertLinkedItemsToArray(response.linkedItems), }); ``` #### Resolving rich text in node.js If you need to resolve rich text in `node.js`, you have to install following parser: ``` npm i @kentico/kontent-delivery-node-parser --save ``` Once installed, it can be used by passing the parser to rich text resolver: ```typescript import { createRichTextHtmlResolver, createAsyncRichTextHtmlResolver } from '@kentico/kontent-delivery'; import { nodeParser, asyncNodeParser } from '@kentico/kontent-delivery-node-parser'; // transform rich text html into json const json = createRichTextHtmlResolver(nodeParser).resolveRichText(data); // or const html = await createAsyncRichTextHtmlResolver(asyncNodeParser).resolveRichText(data); ``` ### Creating custom rich text resolvers This SDK provides you with `browserParser` which you can use to implement your own rich text resolver. A common usecase for creating custom resolvers is when you want to convert rich text element into, for example, `react components`, `angular commponents` or components in some other popular framework. The parser will take care of actually parsing html, while you can focus on creating specific logic for creating components dynamically. ## Get content types To retrieve information about your content types, you can use the `type` and `types` methods. ```typescript deliveryClient .type('movie') // codename of the type .toPromise(); deliveryClient.types().toPromise(); deliveryClient.types().toAllPromise(); ``` ## Get taxonomies To retrieve information about your taxonomies, you can use the `taxonomy` and `taxonomies` methods. ```typescript deliveryClient .taxonomy('taxonomyGroupName') // codename of the Taxonomy group .toPromise(); deliveryClient.taxonomies().toPromise(); deliveryClient.taxonomies().toAllPromise(); ``` ## Proxy configuration If you want to use a proxy server, you need to use different domain or otherwise transform URL. By using `proxy` configuration option you can define your own base domains as well as URL format. This is useful if you need to for example hide the `projectId` from URL. `IDeliveryClientProxyConfig` offers 3 ways of configuring proxy url: 1. `baseUrl` - Base url used for preview reqeusts. Defaults to 'preview-deliver.kontent.ai' 2. `basePreviewUrl` - Base url used for all requests. Defaults to 'deliver.kontent.ai' 3. `advancedProxyUrlResolver` - Resolver function where you get `IProxyUrlData` context data (includes domain, action, query parameters..) and can fully customize final URL. Examples: ```typescript const client = createDeliveryClient({ projectId: '', // Will be used instead of 'https://deliver.kontent.ai' for all requests. // Parameters, filters, project Id and other parts of URL will use default values. proxy: { baseUrl: 'http://my-proxy.io' } }); ``` ```typescript const client = createDeliveryClient({ projectId: '', proxy: { advancedProxyUrlResolver: (data) => { const action = data.action; // /items const domain = data.domain; // https://deliver.kontent.ai const projectId = data.projectId; // xxx const queryString = data.queryString; // e.g. ?depth=1&elements=xElement const queryParameters = data.queryParameters; // array with query parameters parameters const queryConfig = data.queryConfig; // query configuration return `http://my-proxy.io${action}${queryString}`; // proxy url with omitted project Id } } }); ``` ## Error handling If the error originates in Kontent by Kentico (see [error responses](https://kontent.ai/learn/reference/delivery-api#section/SDKs)), you will get a `DeliveryError` object instance with more specific information. Otherwise, you will get original error. ```typescript import { DeliveryError } from '@kentico/kontent-delivery'; try { await deliveryClient.item('invalid_codename').toPromise(); } catch (error) { if (error instanceof DeliveryError) { // delivery specific error (e.g. item with codename not found...) console.log(err.message, err.errorCode); } else { // some other error console.log(error); } } ``` ### Remapping json responses In some scenarios you might want to store `json` response for later use and use SDK to map the response for you. There are 2 ways you can map previously stored `json`: ```typescript const result = await deliveryClient.item('codename').toPromise(); const json = result.response.data; // approach #1 const remappedData = deliveryClient.mappingService.viewContentItemResponse(json); // approach #2 const remappedData = deliveryClient.item(movieCodename).map(json); ``` ### Handling circular references By default the SDK automatically maps content items present in `linked items` & `rich text` elements. Linked items can reference other linked items in their tree (e.g. child item referencing parent) which may cause infinite nesting (circular reference). This behavior is not an issue for most scenarios, in fact it is beneficial as you can easily access all linked items. However, you cannot easily serialize such model. Using e.g. `JSON.stringify` would fail if there are circular references. For this reason, you may disable mapping of linked items with `linkedItemsReferenceHandler` configuration option. ```typescript const client = getTestDeliveryClient({ projectId: '', linkedItemsReferenceHandler: 'ignore' // or 'map' }); ``` ### Using custom HTTP service The SDK allows you to inject your own instance of a class implementing the `IHttpService` interface. This way you can easily mock responses, implement your own http service, or modify the requests in some other way. Sample of a test `HttpService` implementation can be found at https://github.com/Kentico/kontent-core-js/blob/7ec7faaa779a4aa55802ade927f296cc3619a720/lib/http/test-http.service.ts Once you have your `HttpService`, use it in delivery client initialization: ```typescript const deliveryClient = createDeliveryClient({ projectId: '', httpService: YourHttpServiceImplementation }); ``` ## Debugging ### Accessing request data Every response from this SDK contains additional debug data you can use to inspect when something is not right or if you need to access response headers or other network related properties. ```typescript const deliveryResponse = await createDeliveryClient({ projectId: ' If you want to mock http responses, it is possible to use > [custom Http Service](https://github.com/Kentico/kontent-core-js#testing) as a part of the > [delivery client configuration](#client-configuration). ## Feedback & Contribution Feedback & Contributions are welcomed. Feel free to take/start an issue & submit PR.

	Stars	Issues	Version	Updated	Created
@kentico/kontent-delivery			11.13.0	2 years ago	5 years ago
@sitecore-jss/sitecore-jss	253	40	21.7.1	24 days ago	7 years ago
contentstack			3.19.2	7 days ago	9 years ago

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