Second, the sizes value is parsed and used to trim the values in the automatically-created source set. If you don't specify a sizes value, a default value of 100vw (full screen width) is used.
#Js responsive resize effect full#
The sizes property allows you to tell the browser that the image will actually be smaller than full screen. When the browser chooses, it does not yet know the size of the image on the page, so it selects an image that is the same size or larger than the viewport. The sizes property serves two important purposes related to image performance:įirst, the value of sizes is used by the browser to determine which size of the image to download, from next/image's automatically-generated source set. It will be ignored for images using layout="intrinsic" or layout="fixed". The value of sizes will greatly affect performance for images using layout="responsive" or layout="fill". Here is an example of using a custom loader with next/image: import Image from 'next/image' const myLoader = ( sizesĪ string that provides information about how wide the image will be at different breakpoints. Setting the loader as a prop on the Image component overrides the default loader defined in the images section of .Ī loader is a function returning a URL string for the image, given the following parameters:
Ensure the parent element has position: relative in their stylesheet.Ī custom function used to resolve URLs.This is usually paired with the objectFit property.When fill, the image will stretch both width and height to the dimensions of the parent element, provided the parent element is relative.Ensure the parent element uses display: block in their stylesheet.When responsive, the image will scale the dimensions down for smaller viewports and scale up for larger viewports.When fixed, the image dimensions will not change as the viewport changes (no responsiveness) similar to the native img element.When intrinsic, the image will scale the dimensions down for smaller viewports, but maintain the original dimensions for larger viewports.Grow in both X and Y axes to fill container
2048w, 3840w (based on imageSizes and deviceSizes) Scale down to fit width of container, up to image sizeĦ40w, 750w. The layout behavior of the image as the viewport changes size. Find details about more rarely-used properties in the Advanced Props section. This section describes the most commonly-used properties of the Image component. The component accepts a number of additional properties beyond those which are required. The height property is required, except for statically imported images, or those with layout="fill". When using layout="responsive", layout="fill", the height property represents the original height in pixels, so it will only affect the aspect ratio.
When using layout="intrinsic" or layout="fixed" the height property represents the rendered height in pixels, so it will affect how large the image appears. The height property can represent either the rendered height or original height in pixels, depending on the layout and sizes properties. The width property is required, except for statically imported images, or those with layout="fill". When using layout="responsive", layout="fill", the width property represents the original width in pixels, so it will only affect the aspect ratio. When using layout="intrinsic" or layout="fixed" the width property represents the rendered width in pixels, so it will affect how large the image appears. The width property can represent either the rendered width or original width in pixels, depending on the layout and sizes properties. When using an external URL, you must add it to Or an internal path depending on the loader prop or loader configuration. This can be either an absolute external URL, The component requires the following properties. For a feature overview and usage information for images in Next.js, please see Images. Note: This is API documentation for the Image Component and Image Optimization. OnLoadingComplete and lazyBoundary props added. Experimental * support for layout="raw" added.ĭangerouslyAllowSVG and contentSecurityPolicy configuration added. RemotePatterns and unoptimized configuration is stable.Įxperimental remotePatterns and experimental unoptimized configuration added.
0 kommentar(er)
