Documentation and examples for opting images (via component) into responsive behavior (so they never become larger than their parent elements), optionally adding lightweight styles to them — all via props.
BootstrapVue's image components support rounded images, thumbnail styling, alignment, and even the ability to create blank images with an optional solid background color. Support for lazy loaded images is available via the complimentary component.
Image src resolvingThe src prop (and blank-src prop of ), out of the box, works only with absolute or fully-qualified-domain-name URLs. If you are using project assets as image sources, please refer to Component img src resolving for configuring vue-loader to understand custom component props that specify image sources.
Styling imagesSeveral props are available for styling the rendered image element. The following sub-sections cover the various options.
Responsive imagesImages in BootstrapVue can be made responsive with the fluid prop (which sets max-width: 100%; height: auto; via CSS classes) so that it scales with the parent element - up to the maximum native width of the image.
To make a fluid image that will grow to fill the width of its container, use the fluid-grow prop. Note this may cause blurring on small bitmap images.
Small image with fluid:Small image with fluid-grow:Use the block prop to force the image to display as a block element rather than the browser default of inline-block element.
Note: In Internet Explorer 10, SVG images with fluid are disproportionately sized. To fix this, add the style width: 100% \9; where necessary. This fix improperly sizes other image formats, so Bootstrap v4 doesn't apply it automatically.
Image thumbnailsYou can use prop thumbnail to give an image a rounded light border appearance.
Rounded cornersYou can control which corners are rounded by setting the rounded prop to one of the following values:
true (or prop present with no value): round all corners false (or prop not present): no explicit rounding or corners (default) 'top': round the top corners 'right': round the right corners 'bottom': round the bottom corners 'left': round the left corners 'circle': make a circle (if square image) or oval (if not square) border '0': explicitly turn off rounding of cornersexport default {data() { return {mainProps: { blank: true, blankColor: '#777', width: 75, height: 75, class: 'm1' } }} }Aligning imagesAlign images with the boolean props left (floats left) right(floats right), and center (auto left+right margins). You can also center images by placing them in a container that has the class text-center.
Left an Right aligned (float):
Center aligned (block):
Note: left takes precedence over right which takes precedence over center.
Blank (or solid color) imagesprovides built-in support for generating blank images (transparent by default) of any width and height, by setting the blank prop, and specifying width and height values (in pixels). You can apply any of the other props to change the style/behavior of the generated image.
Use the blank-color prop to set the blank image color. The blank-colorprop can accept any CSS color value:
Named colors — i.e. orange or blue Hex colors — i.e. #FF9E2C RGB and RGBa colors — i.e. rgb(255, 158, 44) and rgba(255, 158, 44, .5) HSL and HSLa colors — i.e. hsl(32, 100%, 59%) and hsla(32, 100%, 59%, .5)The default blank-color is transparent.
export default {data() { return {mainProps: { blank: true, width: 75, height: 75, class: 'm1' } }} }Notes:
In blank image mode, if only one of width or height is set, the image will be have both width and height set to the same value. In blank image mode, if width and height are not set, both width and height will internally be set to 1. The blank prop takes precedence over the src prop. If you set both and later set blank to false the image specified in src will then be displayed. Blank images are rendered using SVG image data URLs. The width and height props will also apply the width and height attributes to the renderedtag, even if blank is not set. srcset supportsupports the srcset and sizes attributes on images. The props accept either a string value, or an array of strings (the array of strings will be converted into a single string separated by commas).
For details on usage of these attributes, refer to MDN's Responsive Images guide.
Notes:
If the blank prop is set, then srcset and sizes props are ignored IE 11 does not support srcset and sizes, so ensure you have a value for the src prop Vue-loader does not support project relative URLs (asset URLs) on the srcset attribute. Instead use require(...) to resolve the individual URL paths. Be cautious of creating a string of data URI's longer than supported by the maximum attribute value length of the browser. If your webpack config has a limit for the url-loader and you want to prevent inline data-urls, you may have to overwrite the loader limits: require('!!url-loader?limit=0!./assets/photo.jpg') Support for srcset and sizes was added in release 2.1.0 Lazy loaded imagesUse our complementary image component (based on ) to lazy load images as they are scrolled into view (or within offset pixels of the viewport).
Lazy loading images uses IntersectionObserver if supported by the browser (or via a polyfill) to detect when the image should be shown. If IntersectionObserver support is not detected, then the image will always be shown.
UsageSet the src prop to the URL of the image you want loaded lazily, and either specify a placeholder image URL via the prop blank-src, or have a blank placeholder image generated for you by leaving blank-src as null.
Specify the width and height of the placeholder via the blank-width and blank-height props. If these props are not set, then they will fall back to the width and height props (which are applied to the image specified via src).
Control the generated blank image color by setting the prop blank-color.
Placeholder images (either explicitly provided, or dynamically generated) should have the same width and height values, or at least the same aspect ratio, as the src image.
Feel free to use the fluid, fluid-grow, thumbnail, and rounded props of .
The offset prop specifies the number of pixels that an image needs to be near to the viewport to trigger it to be shown. The default value is 360.
The throttle prop controls how long (in ms) after a scroll (or resize, or orientationchange, or transitionend) event happens before checking if the image has come within view (or within offset of view). The default is 100 (ms). throttle has no effect if IntersectionObserver support is detected.
Once an image has come into view and is shown, the event listeners and/or Intersection Observer are removed.
Example usage:
export default {data() { return {mainProps: { center: true, fluidGrow: true, blank: true, blankColor: '#bbb', width: 600, height: 400, class: 'my-5'} }},methods: { getImageUrl(imageId) {const { width, height } = this.mainPropsreturn `https://picsum.photos/${width}/${height}/?image=${imageId}` }} }Force show of lazy loaded imageTo force the final image to be shown, set the show prop to true. The show prop supports the Vue .sync modifier, and will be updated to true when the final image is shown.
Lazy loaded srcset supportsupports setting the srcset and sizes attributes on the renderedelement. These props will only be applied to the image once it has come into view.
See srcset support above for prop usage details and limitations.
Support for srcset and sizes was added in release 2.1.0.
Component reference Functional componentView source Properties PropertiesAll property default values are globally configurable.
Property (Click to sort ascending)Type (Click to sort ascending)DefaultDescriptionalt StringValue to set for the `alt` attributeblank BooleanfalseCreates a blank/transparent image via an SVG data URIblank-color String'transparent'Sets the color of the blank image to the CSS color value specifiedblock BooleanfalseForces the image to display as a block element rather than the browser default of inline-block elementcenter BooleanfalseCenters the image horizontallyfluid BooleanfalseMakes the image responsive. The image will shrink as needed or grow up the the image's native widthfluid-grow BooleanfalseSimilar to the 'fluid' prop, but allows the image to scale up past its native widthheight Number or StringThe value to set on the image's 'height' attributeleft BooleanfalseFloats the image to the left when setright BooleanfalseFloats the image to the right when setrounded Boolean or StringfalseWhen set to 'true', makes the image corners slightly rounded. Can also be used to disable rounded corners or make the image a circle/oval. See docs for detailssizes v2.1.0+Array or StringOne or more strings separated by commas (or an array of strings), indicating a set of source sizes. Optionally used in combination with the srcset propsrc StringURL to set for the `src` attributesrcset v2.1.0+Array or StringOne or more strings separated by commas (or an array of strings), indicating possible image sources for the user agent to usethumbnail BooleanfalseAdds a thumbnail border around the imagewidth Number or StringThe value to set on the image's 'width' attribute View source Properties PropertiesAll property default values are globally configurable.
Property (Click to sort ascending)Type (Click to sort ascending)DefaultDescriptionalt StringValue to set for the `alt` attributeblank-color String'transparent'Sets the color of the blank placeholder image to the CSS color value specifiedblank-height Number or StringThe value to set on the placeholder image's 'height' attribute. Defaults to value of the 'height' propblank-src StringnullPlaceholder image instead of a blank imageblank-width Number or StringThe value to set on the placeholder image's 'width' attribute. Defaults to value of the 'width' propblock BooleanfalseForces the image to display as a block element rather than the browser default of inline-block elementcenter BooleanfalseCenters the image horizontallyfluid BooleanfalseMakes the image responsive. The image will shrink as needed or grow up the the image's native widthfluid-grow BooleanfalseSimilar to the 'fluid' prop, but allows the image to scale up past its native widthheight Number or StringThe value to set on the image's 'height' attributeleft BooleanfalseFloats the image to the left when setoffset Number or String360Number of pixels away from the viewport edge before the lazy image is loadedright BooleanfalseFloats the image to the right when setrounded Boolean or StringfalseWhen set to 'true', makes the image corners slightly rounded. Can also be used to disable rounded corners or make the image a circle/oval. See docs for detailsshow BooleanfalseIf set to true, will force show the image specified via the 'src' propsizes v2.1.0+Array or StringOne or more strings separated by commas (or an array of strings), indicating a set of source sizes. Optionally used in combination with the srcset propsrc StringURL to set for the `src` attributesrcset v2.1.0+Array or StringOne or more strings separated by commas (or an array of strings), indicating possible image sources for the user agent to usethumbnail BooleanfalseAdds a thumbnail border around the imagewidth Number or StringThe value to set on the image's 'width' attribute Importing individual componentsYou can import individual components into your project via the following namedexports:
ComponentNamed ExportImport PathBImgbootstrap-vueBImgLazybootstrap-vueExample:
import { BImg } from 'bootstrap-vue'Vue.component('b-img', BImg)Importing as a Vue.js pluginThis plugin includes all of the above listed individual components. Plugins also include any component aliases.
Named ExportImport PathImagePluginbootstrap-vueExample:
import { ImagePlugin } from 'bootstrap-vue'Vue.use(ImagePlugin)