@sanity/image-url

What is @sanity/image-url?

@sanity/image-url is a JavaScript client for generating URLs for images stored in Sanity's content lake. It allows you to build image URLs with various transformations such as resizing, cropping, and format conversion.

What are @sanity/image-url's main functionalities?

Basic URL Generation

This feature allows you to generate a basic URL for an image stored in Sanity. You need to provide the project ID and dataset, and then you can generate the URL for a specific image asset.

const imageUrlBuilder = require('@sanity/image-url');
const client = { projectId: 'yourProjectId', dataset: 'yourDataset' };
const builder = imageUrlBuilder(client);
const url = builder.image('image-asset-id').url();
console.log(url);

Image Resizing

This feature allows you to resize an image by specifying the width and height. The generated URL will point to the resized image.

const url = builder.image('image-asset-id').width(300).height(200).url();
console.log(url);

Image Cropping

This feature allows you to crop an image. You can specify different cropping options such as 'center', 'top', 'bottom', etc.

const url = builder.image('image-asset-id').crop('center').url();
console.log(url);

Format Conversion

This feature allows you to convert the image format. For example, you can convert an image to 'webp' format.

const url = builder.image('image-asset-id').format('webp').url();
console.log(url);

Other packages similar to @sanity/image-url

cloudinary

Cloudinary is a cloud-based service that provides an end-to-end image and video management solution. It offers similar functionalities such as URL generation, image resizing, cropping, and format conversion. However, Cloudinary is a more comprehensive service with additional features like video management, advanced image transformations, and a robust API.

imgix

Imgix is a real-time image processing service that allows you to manipulate images on the fly by changing URL parameters. It offers functionalities like resizing, cropping, and format conversion similar to @sanity/image-url. Imgix is known for its performance and extensive set of image manipulation options.

sharp

Sharp is a high-performance Node.js image processing library. It allows you to resize, crop, and convert images, similar to @sanity/image-url. Unlike @sanity/image-url, Sharp processes images locally rather than generating URLs for remote images.

README

@sanity/image-url

Quickly generate image urls from Sanity image records.

This helper will by default respect any crops/hotspots specified in the Sanity content provided to it. The most typical use case for this is to give it a sanity image and specify a width, height or both and get a nice, cropped and resized image according to the wishes of the content editor and the specifications of the front end developer.

In addition to the core use case, this library provides a handy builder to access the rich selection of processing options available in the Sanity image pipeline.

Getting started

npm install --save @sanity/image-url

Usage

The most common way to use this library in your project is to configure it by passing it your configured sanityClient. That way it will automatically be preconfigured to your current project and dataset:

import React from 'react'
import myConfiguredSanityClient from './sanityClient'
import imageUrlBuilder from '@sanity/image-url'

const builder = imageUrlBuilder(myConfiguredSanityClient)

function urlFor(source) {
  return builder.image(source)
}

Then you can use the handy builder syntax to generate your urls:

<img
  src={urlFor(author.image)
    .width(200)
    .url()}
/>

This will ensure that the author image is alway 200 pixels wide, automatically applying any crop specified by the editor and cropping towards the hot-spot she drew. You can specify both width and height like this:

  <img src={urlFor(movie.poster).width(500).height(300).url()}>

There are a huge number of useful options you can specify, like e.g. blur:

  <img src={urlFor(mysteryPerson.mugshot).width(200).height(200).blur(50).url()}>

Note that the url() function needs to be the final one in order to output the url as a string.

Builder methods

image(source)

Specify the image to be rendered. Accepts either a Sanity image record, an asset record, or just the asset id as a string. In order for hotspot/crop processing to be applied, the image record must be supplied, as well as both width and height.

dataset(dataset), projectId(projectId)

Usually you should preconfigure your builder with dataset and project id, but even whem you did, these let you temporarily override them if you need to render assets from other projects or datasets.

width(pixels)

Specify the width of the rendered image in pixels.

height(pixels)

Specify the height of the rendered image in pixels.

size(width, height)

Specify width and height in one go.

focalPoint(x, y)

Specify a center point to focus on when cropping the image. Values from 0.0 to 1.0 in fractions of the image dimensions. When specified, overrides any crop or hotspot in the image record.

minWidth(pixels), maxWidth(pixels), minHeight(pixels), maxHeight(pixels)

Specifies min/max dimensions when cropping

blur(amount), sharpen(amount), invert()

Apply image processing.

rect(left, top, width, height)

Specify the crop in pixels. Overrides any crop/hotspot in the image record.

format(name)

Specify the image format of the image. 'jpg', 'pjpg', 'png', 'webp'

auto(mode)

Specify transformations to automatically apply based on browser capabilities. Supported values:

• format - Automatically uses WebP if supported

orientation(angle)

Rotation in degrees. Acceptable values: 0, 90, 180, 270

quality(value)

Compression quality, where applicable. 0-100

forceDownload(defaultFileName)

Make this an url to download the image. Specify the file name that will be suggested to the user.

flipHorizontal(), flipVertical()

Flips the image.

crop(mode)

Specifies how to crop the image. When specified, overrides any crop or hotspot in the image record. See the documentation for details.

fit(value)

Configures the fit mode. See the documentation for details.

dpr(value)

Specifies device pixel ratio scaling factor. From 1 to 3.

saturation(value)

Adjusts the saturation of the image. Currently the only supported value is -100 - meaning it grayscales the image.

ignoreImageParams()

Ignore any specifications from the image record (i.e. crop and hotspot).

url(), toString()

Return the url as a string.