SvelteKit
Use TwicPics SvelteKit Components to get images and videos integration best practices out-of-the-box.
Discover our demonstrations and integration examples in our online demo project.
Installation
Add the @twicpics/components
package to your project as a dev dependency:
# Using yarn
yarn add @twicpics/components -D
# Or using npm
npm install @twicpics/components --D
Setup
You will need a TwicPics domain to initialize the package. Create an account for free to get your domain.
SvelteKit
project
Setting up TwicPics Components in your Add the import part:
// import TwicPics sveltekit components
import { installTwicpics } from "@twicpics/components/sveltekit";
// import TwicPics components css
import "@twicpics/components/style.css";
And the configuration part (see Setup Options):
installTwicpics( {
// domain is mandatory
"domain": "https://<your-domain>.twic.pics"
} );
into the main layout of your SvelteKit
project.
If you don't already have a layout that applies to all the pages of your application, simply create it by adding +layout.svelte
file, right next to your entry point src/routes/+page.svelte
.
src/routes/+layout.svelte
<script>
// Here is an example of +layout.svelte file
import { installTwicPics } from "@twicpics/components/sveltekit";
import "@twicpics/components/style.css";
installTwicPics( {
"domain": `https://<your-domain>.twic.pics`,
} );
</script>
<slot />
Setup Options
Option | Description | Type | Default |
---|---|---|---|
anticipation | TwicPics will lazy-load images by default. To avoid too abrupt a transition with elements appearing into view and then images very obviously loading afterwards, TwicPics will "anticipate" lazy loading by a factor of the actual viewport. This behavior is controlled by this setting. | Number | 0.2 |
breakpoints | Customizes breakpoints value for responsive behavior. | object | { xs: 320, sm: 640, md: 768, lg: 1024, xl: 1280, '2xl': 1536 } |
domain | This is your very own TwicPics domain. Providing it is mandatory. | String | |
env | Can be debug , offline or production . When set to debug , a gray lightweight svg placeholder that displays its intrinsic dimensions is displayed in place of all medias targeted by their src value. When set to offline , these medias are replaced by a simple placeholder that allows to visualise their display area. | String | "production" |
handleShadowDom | Must be set to true when using TwicComponents within a shadow DOM. | boolean | false |
maxDPR | TwicPics will take the "Device Pixel Ratio" (DPR ) of the current device into consideration when determining the sizes of images to load. By default, it will not take a DPR greater than 2 into consideration. If the DPR of the device is higher than 2 , TwicPics will assume it to be 2 . Using maxDPR , you can lower this limit down to 1 or be more permissive (for instance by setting it to 3 or 4 ). | Number | 2 |
path | Path to prepend to all src attributes. For instance, if path is "some/folder" then a src attribute set to "image.jpg" will be expanded into "some/folder/image.jpg" | String | |
step | To avoid requesting too may variants of the same image, TwicPics will round the width of images to the closest multiple of step. The height will then be computed in order to respect the original aspect ratio. | Integer | 10 |
Usage
Import TwicPics Components such as TwicImg
, TwicPicture
, or TwicVideo
into your template files.
Replace standard img
, picture
, or video
tags with these components to enhance functionality and customization (see Components Properties).
Add the import part in the script
section of your .svelte
file:
<script>
// this component will be used in instead of an img element.
import { TwicImg } from "@twicpics/components/sveltekit";
// this component will be used in instead of a `picture` element.
import { TwicPicture } from "@twicpics/components/sveltekit";
// this component will be used in instead of an video element.
import { TwicVideo } from "@twicpics/components/sveltekit";
</script>
or
<script>
// this component will be used in instead of an img element.
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
// this component will be used in instead of a `picture` element.
import TwicPicture from "@twicpics/components/sveltekit/TwicPicture.svelte";
// this component will be used in instead of a video element.
import TwicVideo from "@twicpics/components/sveltekit/TwicVideo.svelte";
</script>
then, use <TwicImg>
, <TwicPicture>
or <TwicVideo>
instead of standard tags <img>
, picture
or <video>
(see Components Properties).
Basic usage
<!-- component.svelte-->
<script>
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
</script>
<main>
<TwicImg src="path/to/your/image"></TwicImg>
</main>
Bulk loading with TwicView
By default, <TwicImg>
and <TwicVideo>
will only start loading when they enter the viewport. But sometimes, you may want to load multiple assets in bulk instead of lazy loading them. This is where <TwicView>
comes into play.
The <TwicView>
component eagerly loads all of his <TwicImg>
and <TwicVideo>
children as soon as it enters the viewport (depending on your anticipation settings.)
For example, if you're building a carousel, you might want to bulk-load all images. In the following code, all three images will be loaded when TwicView
comes into the viewport:
<TwicView>
<TwicImg src="image1.jpg" />
<TwicImg src="image2.jpg" />
<TwicImg src="image3.jpg" />
</TwicView>
Critical Images
TwicPicture
streamlines the use of picture
elements and srcset
attributes.
It operates independently of TwicPics Native and dynamically generates source
elements and srcset
attributes from a single master file using variants transformed through the TwicPics API.
Resolution switching
The following examples illustrate how to serve different resolutions of the same image according to breakpoints
and maxDPR
defined in Setup Options.
<!-- Populate srcset and fallback with a list of squared variants -->
<TwicPicture src="your-lcp-image.jpg"></TwicPicture>
<!-- Populate srcset and fallback with a list of 16/9 variants -->
<TwicPicture
src="your-lcp-image.jpg"
ratio="16/9"
></TwicPicture>
<!-- eager disables lazy-loading and sets fetchpriority to high -->
<TwicPicture
src="your-lcp-image.jpg"
eager
></TwicPicture>
<!-- for best performances set sizes attribute is a best practice -->
<TwicPicture
src="your-lcp-image.jpg"
eager
sizes="
(min-width: 1000px) 33vw,
96vw
"
></TwicPicture>
For a comprehensive list of properties and detailed information, please refer to TwicPicture.
Art Direction
To achieve art direction, configure the following TwicPicture
's properties following the mobile-first principle:
- anchor
- focus
- mode
- position
- preTransform
- ratio
The following examples illustrate how to serve various image variations based on distinct artistic directions and default breakpoint values:
<!--
This will display a :
squared variant (default ratio) for screen with a width < 1024 px
4/3 variant for screen with a width >= 1024 px
21/9 variant for screen with a width >= 1280 px
-->
<TwicPicture
src="art.jpg"
alt="Art Direction Example"
ratio="
@lg 4/3
@xl 21/9
"
/>
<!--
This allows to change the focus point for screen with a width >= 1280 px
-->
<TwicPicture
src="art.jpg"
alt="Art Direction Example"
ratio="
@lg 4/3
@xl 21/9
"
focus="@xl top"
/>
<!--
This allows to set the cropping and focus point for small device
and reset the setting for screen with a width >= 768 px
-->
<TwicPicture
src="art.jpg"
alt="Art Direction Example"
preTransform="
crop=1000x1000@0.25sx0.25s
@md none
"
focus="
0.5sx1s
@md none
"
/>
<!--
You can also configure a custom breakpoint
-->
<TwicPicture
src="art.jpg"
alt="Art Direction Example"
ratio="
@lg 4/3
@xl 21/9
"
focus="
@666 bottom
@xl top
"
/>
Default breakpoint values can be configured here.
Image magnifier
The <TwicImg>
component lets you display a lazy loaded, zoomed version of your image on mouseover.
To activate the zoom feature, set the zoom
property to a number strictly greater than 1. This number represents the magnification factor of your image.
For example:
<TwicImg src="image1.jpg" zoom="2" />
<TwicImg src="image2.jpg" zoom="2.5" />
The zoom factor can also be configured through the --twic-zoom
CSS variable.
To activate the style-driven zoom, set the zoom
property to 'css'
and add a new rule to your stylesheet.
For example:
<TwicImg src="image3.jpg" zoom="css" class=".zoom-3"/>
.zoom-3 {
--twic-zoom:3;
}
It applies only to the TwicImg
component in cover mode
.
Lifecycle
For TwicImg
and TwicVideo
components, binding state
props gives access to the loading state of your image or video.
Here are the values the Component will emit :
new
: when theimg
orvideo
source has not started loadingloading
: when theimg
orvideo
source is loadingdone
: when theimg
orvideo
source has successfully loadederror
: when an error occurred while loading theimg
orvideo
source
<script>
// component.svelte
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
let state;
$: {
// Implement the logic here
console.log( `TwicComponent emits a new state`, state );
}
</script>
<TwicImg
bind:state
src="path/to/your/image"
/>
Another approach is to listen to the statechange
event.
<script>
// component.svelte
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
let state;
const handleStateChange = ( e ) => {
// Implement the logic here
state = e.detail;
console.log( `TwicComponent emits a new state`, state );
}
</script>
<TwicImg
on:statechange={handleStateChange}
src="path/to/your/image"
/>
Refit example
<TwicImg>
and <TwicPicture>
components allow to reframe your image on the main subject(s) they contain.
In cover mode
, the resulting image will respect the ratio
while maximizing the area occupied by the main subject(s).
In contain mode
, the image is cropped as close as possible to the main subject(s).
To activate automatic cropping, add the refit
property to your component.
By default, the subject will be placed at the center of the resulting image, but it is possible to align the subject with a given border by specifying an anchor
.
Also, by default, the subject will touch the borders of the resulting image. This can be avoided by setting refit
with a comma-separated length value defining padding.
For example:
<!-- default refit: centered object(s), no padding around -->
<TwicImg src="image1.jpg" refit />
<!-- main subject(s) will be left aligned -->
<TwicImg src="image3.jpg" anchor="left" refit/>
<!-- a 5% padding will be applied around main subject(s) -->
<TwicImg src="image2.jpg" refit="5p" />
<!-- a 5% padding will be applied vertically, a 10% padding will be applied horizontally -->
<TwicImg src="image3.jpg" refit="5p,10p" />
Style-Driven Approach
You can set up TwicImg
and TwicVideo
components using pure CSS and the power of CSS variables.
<script>
// component.svelte
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
</script>
<style>
.landscape {
--twic-ratio: calc(4 / 3);
}
.portrait {
--twic-ratio: calc(3 / 4);
}
.square {
--twic-ratio: calc(1);
}
.lg {
width: 300px;
}
.md {
width: 150px;
}
.sm {
width: 100px;
}
</style>
<main>
<div class="landscape">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
<div class="square">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
<div class="portrait">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
<div class="lg">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
<div class="md">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
<div class="sm">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
</main>
Responsive Example
Setting up TwicImg
and TwicVideo
components using CSS and CSS variables enables hassle-free responsive designs.
Your template features a single component that will follow your CSS directives and behave responsively.
<script>
// component.svelte
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
</script>
<style>
.style-driven-responsive {
--twic-ratio: calc(2 / 3);
--twic-mode: cover;
margin: auto;
}
@media (min-width: 640px) {
.style-driven-responsive {
--twic-ratio: calc(1);
}
}
@media (min-width: 768px) {
.style-driven-responsive {
--twic-ratio: calc(4 / 3);
}
}
@media (min-width: 1024px) {
.style-driven-responsive {
--twic-ratio: calc(16 / 9);
}
}
@media (min-width: 1280px) {
.style-driven-responsive {
--twic-ratio: calc(1.85);
}
}
@media (min-width: 1536px) {
.style-driven-responsive {
--twic-ratio: calc(21 / 9);
}
}
</style>
<main>
<div class="style-driven-responsive">
<TwicImg src="path/to/your/image"></TwicImg>
</div>
</main>
Working with ratio="none"
With TwicPicture
It is helpful if you want to display an image with its intrinsic aspect ratio without cropping.
When using ratio="none"
, there is no CLS optimization, and you are responsible for it.
<!-- will display your image with it's intrinsic ratio, without any cropping -->
<TwicPicture>
src="path/to/your/image"
ratio="none"
</TwicPicture>
With TwicImg and TwicVideo
It is particularly useful when creating a "hero" banner. You can specify the height of your image while respecting its natural aspect ratio, and optimizing your Cumulative Layout Shift (CLS) metric.
When using ratio="none"
, you are responsible for properly sizing the component.
<script>
// component.svelte
import TwicImg from "@twicpics/components/sveltekit/TwicImg.svelte";
</script>
<style>
/* You are responsible for properly sizing the component. */
.hero-image {
height:500px;
}
@media (min-width: 1024px) {
.hero-image {
height:300px;
width:100%;
}
}
</style>
<TwicImg
src="path/to/your/image"
className="hero-image"
ratio="none"
></TwicImg>
Components Properties
TwicImg
This component is a drop-in replacement for the img
tag dedicated to content images.
It offers advanced features like optimized Cumulative Layout Shift (CLS), Low-Quality Image Placeholder (LQIP), and lazy loading out of the box.
<TwicImg
src="<path>"
alt="<String>"
anchor="<String>"
bot="<String>"
eager="<boolean>"
focus="<auto|coordinates>"
intrinsic="<String>"
mode="<contain|cover>"
position="<css position>"
placeholder="<preview|maincolor|meancolor|none>"
preTransform="<String>"
ratio="<ratio>"
bind:state="<String>"
on:statechange="<function>"
refit="<boolean|String>"
step="<integer>"
title="<String>"
transition="<fade|zoom|none>"
transitionDelay="<String>"
transitionDuration="<String>"
transitionTimingFunction="<String>"
zoom="<String | Number>"
/>
Attribute | Description | Type | Default |
---|---|---|---|
alt | alt attribute content | String | |
anchor | Positions the image in both contain and cover mode. Accepted values are top , bottom , left , right , top-left , top-right , bottom-left , bottom-right and center . position and focus take precedence in contain and cover mode respectively. Please note that anchor is applied after an eventual preTransform . When using refit in cover mode, anchor aligns the main object(s) with the given border side. | String | |
bot | A slash-separated list of TwicPics API transformations to be performed for search engine bots. This overrides all other transformations when provided, even if empty (i.e bot="" ). See the TwicPics bot attribute documentation for more information. | String | |
eager | Load the image as soon as the component is mounted. This effectively means disabling lazy loading for this image. | boolean | false |
focus | Sets the focus point in cover mode. focus takes precedence over anchor when both are provided. See the TwicPics focus attribute documentation for more information. Only use this attribute if you need a specific focus point or if you want to leverage smart cropping with focus="auto" : if you only need border-based positionning (top , bottom , left , right , etc), use anchor instead. | String | |
intrinsic | Dimensions in pixels of the original image, formatted <width>x<height> (eg. 1920x1080). It prevents image upscaling and limits the number of generated variants. If using preTransform , you should specify the intrinsic dimensions of the resulting image. Using incorrect values can lead to display issues, see the intrinsic attribute documentation. | String | |
mode | Can be contain or cover and determines if the image fills the area and is cropped accordingly (cover ) or if the image will sit inside the area with no cropping (contain ). | String | cover |
placeholder | Can be preview , meancolor , maincolor or none . See the TwicPics output transformation documentation for more information. Setting will be overridden to none when using zoom transition . | String | preview |
position | Positions the image in contain mode. position takes precedence over anchor when both are provided. Syntax is the same as for CSS position properties background-position and object-position . Only use this attribute if you need precise positionning: if you only need border-based positionning (top , bottom , left , right , etc), use anchor instead. | String | center |
preTransform | A slash-separated list of TwicPics API transformations to be performed before resizing the image (see the TwicPics Manipulation documentation). Note that anchor and focus are applied after preTransform : if you need to specify a specific focus point for your preTransform then it needs to be part of the expression (like preTransform="focus=auto/crop=50px50p" for instance). Be aware that using this option can lead to unexpected results so use with caution! | String | |
ratio | A unitless width/height or width:height value pair (as in 4/3 or 4:3 ) that defines the aspect ratio of the display area. If height is not specified, it is assumed to be 1 . A square area will be created by default. When set to none , ratio is determined based on width and height as computed by the browser following your CSS definitions. The --twic-ratio CSS variable is ignored in this instance. You are responsible for properly sizing the component when ratio="none" . | String or number | 1 |
refit | Reframes the image to maximize the area occupied by the main object(s) while respecting ratio in cover mode. Crops the image as close as possible to the main object(s) in contain mode. Can be true , false or a list of comma-separated length defining padding. See the TwicPics refit documentation for more information. | boolean or String | false |
src | Path to the image. When not provided, a red lightweight svg placeholder that displays its intrinsic dimensions is displayed in place of the absent image. When env is set to offline , that red lightweight svg is replaced by a simple red placeholder. | String | |
state | A string property being update each time the asset loading state is updated. Values can be new , loading , done or error . | String | |
statechange | A custom event dispatched each time the image loading state is updated. Emitted values can be new , loading , done or error . | ( e: CustomEvent ) => void | |
step | See the TwicPics step attribute documentation for more information. | Integer | 10 |
title | title representing information related to the image. See global attribute title . | String | |
transition | Determines how the image will be revealed once loaded. With a fade in effect (fade ), a zoom effect (zoom ) or without any transition (none ). Unsupported values are handled as fade . | String | fade |
transitionDuration | Duration of the transition effect. | String | 400ms |
transitionTimingFunction | CSS timing function applied to the transition effect. | String | ease |
transitionDelay | Transition delay of the transition effect. | String | 0ms |
zoom | Enables zoom feature and sets the magnification factor. Must be a number strictly greater than 1 as in "1.5" or 1.5 . When set to 'css' , magnification factor is defined through the CSS variable --twic-zoom .Should only be applied to images in cover mode . See Image magnifier. | `String | number` |
TwicPicture
This component serves as a seamless replacement for the picture
element.
With a primary focus on maximizing the Largest Contentful Paint (LCP) score with optimized Cumulative Layout Shift (CLS), it effortlessly generates the srcset
and source
attributes for resolution switching and art direction, all derived from a single master file transformed through the TwicPics API.
<TwicPicture
src="<path>"
alt="<String>"
anchor="<String>"
eager="<boolean>"
fetchpriority="<high|low|auto>"
focus="<auto|coordinates>"
mode="<contain|cover>"
position="<String>"
preTransform="<String>"
ratio="<ratio>"
refit="<boolean|String>"
sizes="<String>"
title="<String>"
/>
Attribute | Description | Type | Default |
---|---|---|---|
alt | alt attribute content | String | |
anchor | Positions the image in both contain and cover mode. Accepted values are top , bottom , left , right , top-left , top-right , bottom-left , bottom-right and center . position and focus take precedence in contain and cover mode respectively. Please note that anchor is applied after an eventual preTransform . Can be set at different breakpoints. | String | |
eager | Load the image as soon as the picture element is processed and set fetchpriority to high . This effectively means disabling lazy loading for this image. Recommended for optimal Largest Contentful Paint (LCP) display. | boolean | false |
fetchpriority | Acts as standard fetchpriority property. Can be high , low or auto . Defaults to high when eager is true. | string | |
focus | Sets the focus point in cover mode. focus takes precedence over anchor when both are provided. See the TwicPics focus attribute documentation for more information. Only use this attribute if you need a specific focus point or if you want to leverage smart cropping with focus="auto" : if you only need border-based positionning (top , bottom , left , right , etc), use anchor instead. Can be set at different breakpoints. | String | |
mode | Can be contain or cover and determines if the image fills the area and is cropped accordingly (cover ) or if the image will sit inside the area with no cropping (contain ). Can be set at different breakpoints. | String | cover |
position | Positions the image in contain mode. position takes precedence over anchor when both are provided. Accepted values are top , bottom , left , right , top-left , top-right , bottom-left , bottom-right and center . Can be set at different breakpoints. | String | center |
preTransform | A slash-separated list of TwicPics API transformations to be performed before resizing the image (see the TwicPics Manipulation documentation). Note that anchor and focus are applied after preTransform : if you need to specify a specific focus point for your preTransform then it needs to be part of the expression (like preTransform="focus=auto/crop=50px50p" for instance). Be aware that using this option can lead to unexpected results so use with caution! Can be set at different breakpoints. | String | |
ratio | A unitless width/height or width:height value pair (as in 4/3 or 4:3 ) that defines the aspect ratio of the display area. If height is not specified, it is assumed to be 1 . A square area will be created by default. When set to none , the image is displayed with its intrinsic aspect ratio. In this case, you are responsible for optimizing the Cumulative Layout Shift (CLS). Can be set at different breakpoints. | String or number | 1 |
refit | Reframes the image to maximize the area occupied by the main object(s) while respecting ratio in cover mode. Crops the image as close as possible to the main object(s) in contain mode. Can be true , false or a list of comma-separated length defining padding. See the TwicPics refit documentation for more information. | boolean or String | false |
sizes | Specifies the layout width of the image for each breakpoints using media query syntax. The value of this parameter has a significant impact on performance. Ensure to configure it carefully. See sizes. | String | |
src | Path to the image. | String | |
title | title representing information related to the image. See global attribute title . | String |
TwicVideo
This component is a drop-in replacement for video
.
It provides seamless playback for videos optimized with TwicPics, offering advanced features like optimized Cumulative Layout Shift (CLS), Low-Quality Image Placeholder (LQIP), and lazy loading out of the box.
<TwicVideo
src="<path>"
anchor="<String>"
bot="<String>"
duration="<String|number>"
eager="<boolean>"
from="<String|number>"
focus="<auto|coordinates>"
intrinsic="<String>"
mode="<contain|cover>"
position="<css position>"
posterFrom="<String|number>"
placeholder="<preview|maincolor|meancolor|none>"
preTransform="<String>"
ratio="<ratio>"
bind:state="<String>"
on:statechange="<function>"
step="<integer>"
title="<String>"
to="<String|number>"
transition="<fade|zoom|none>"
transitionDelay="<String>"
transitionDuration="<String>"
transitionTimingFunction="<String>"
/>
Attribute | Description | Type | Default |
---|---|---|---|
anchor | Positions the video in both contain and cover mode. Accepted values are top , bottom , left , right , top-left , top-right , bottom-left , bottom-right and center . position and focus take precedence in contain and cover mode respectively. Please note that anchor is applied after an eventual preTransform . When using refit in cover mode, anchor aligns the main object(s) with the given border side. | String | |
bot | A slash-separated list of TwicPics API transformations to be performed for search engine bots. This overrides all other transformations when provided, even if empty (i.e bot="" ). See the TwicPics bot attribute documentation for more information. | String | |
duration | Limits the duration of the video. duration is expressed in seconds and must be a positive number. duration will not move the starting point of the video: to do so, you'll have to use the from property. See duration documentation. | String or number | |
eager | Load the video as soon as the component is mounted. This effectively means disabling lazy loading for this video. | boolean | false |
focus | Sets the focus point in cover mode. focus takes precedence over anchor when both are provided. See the TwicPics focus attribute documentation for more information. Only use this attribute if you need a specific focus point or if you want to leverage smart cropping with focus="auto" : if you only need border-based positionning (top , bottom , left , right , etc), use anchor instead. | String | |
from | Moves the starting point of the video. from is expressed in seconds and must be a positive number. from will not move the end point of the video: to do so, you'll have to use the duration or to properties. See from documentation. See from documentation. | String or number | |
intrinsic | Dimensions in pixels of the original video, formatted <width>x<height> (eg. 1920x1080). It prevents video upscaling and limits the number of generated variants. If using preTransform , you should specify the intrinsic dimensions of the resulting video. Using incorrect values can lead to display issues, see the intrinsic attribute documentation. | String | |
mode | Can be contain or cover and determines if the video fills the area and is cropped accordingly (cover ) or if the video will sit inside the area with no cropping (contain ). | String | cover |
placeholder | Can be preview , meancolor , maincolor or none . See the TwicPics output transformation documentation for more information. Setting will be overridden to none when using zoom transition . | String | preview |
position | Positions the video in contain mode. position takes precedence over anchor when both are provided. Syntax is the same as for CSS position properties background-position and object-position . Only use this attribute if you need precise positionning: if you only need border-based positionning (top , bottom , left , right , etc), use anchor instead. | String | center |
posterFrom | Determines which frame of the source video should be used as a poster / preview. posterFrom is expressed in seconds and must be a positive number. By default posterFrom is equal to 0, meaning the very first frame of the video is used. posterFrom will not modify the video in any way: to do so, you'll have to use the duration , from or to properties. | String or number | |
preTransform | A slash-separated list of TwicPics API transformations to be performed before resizing the video (see the TwicPics Manipulation documentation). Note that anchor and focus are applied after preTransform : if you need to specify a specific focus point for your preTransform then it needs to be part of the expression (like preTransform="focus=auto/crop=50px50p" for instance). Be aware that using this option can lead to unexpected results so use with caution! | String | |
ratio | A unitless width/height or width:height value pair (as in 4/3 or 4:3 ) that defines the aspect ratio of the display area. If height is not specified, it is assumed to be 1 . A square area will be created by default. When set to none , ratio is determined based on width and height as computed by the browser following your CSS definitions. The --twic-ratio CSS variable is ignored in this instance. You are responsible for properly sizing the component when ratio="none" . | String or number | 1 |
src | Path to the video. When not provided, a red lightweight svg placeholder that displays its intrinsic dimensions is displayed in place of the absent video. When env is set to offline , that red lightweight svg is replaced by a simple red placeholder. | String | |
state | A string property being update each time the asset loading state is updated. Values can be new , loading , done or error . | String | |
statechange | A custom event dispatched each time the image loading state is updated. Emitted values can be new , loading , done or error . | ( e: CustomEvent ) => void | |
step | See the TwicPics step attribute documentation for more information. | Integer | 10 |
title | title representing information related to the video. See global attribute title . | String | |
to | Moves the end point of the video. to is expressed in seconds and must be a positive number. to will not move the starting point of the video: to do so, you'll have to use the from property. See to documentation. | String or number | |
transition | Determines how the video will be revealed once loaded. With a fade in effect (fade ), a zoom effect (zoom ) or without any transition (none ). Unsupported values are handled as fade . | String | fade |
transitionDuration | Duration of the transition effect. | String | 400ms |
transitionTimingFunction | CSS timing function applied to the transition effect. | String | ease |
transitionDelay | Transition delay of the transition effect. | String | 0ms |
CSS Variables
List of variables that can be used to configure your components using pure CSS:
<selector> {
--twic-ratio: <ratio>;
--twic-mode: <contain|cover>;
--twic-position: <css position>;
--twic-transition-delay: <string>;
--twic-transition-duration: <string>;
--twic-transition-timing-function:<string>;
--twic-zoom:<number>;
}
Each CSS variable corresponds to one of the components attributes listed in the Components Properties section. If present, the attribute takes precedence over the corresponding CSS variable.
Variable | Description | HTML Attribute | Default |
---|---|---|---|
--twic-mode | Can be contain or cover and determines if the image fills the area and is cropped accordingly (cover ) or if the image will sit inside the area with no cropping (contain ). | mode | cover |
--twic-position | Only useful in contain mode. Locates the image inside the area. Syntax is the same as for CSS position properties like background-position or object-position. Useful values are top , bottom , left , right , left top , left bottom and so on. | position | center |
--twic-ratio | Floating point value corresponding to a unitless width/height ratio (as in calc(4/3) or 1.333 ). Ratio will correspond to a square area by default. | ratio | 1 |
--twic-transition-delay | Transition delay of the transition effect. | transitionDelay | 0ms |
--twic-transition-duration | Duration of the transition effect. | transitionDuration | 400ms |
--twic-transition-timing-function | CSS timing function applied to the transition effect. | transitionTimingFunction | ease |
--twic-zoom | Strictly greater than 1 floating point value corresponding to the zoom factor to be applied. Only applies to TwicImg with zoom property set to "CSS" . | number |
Default Breakpoints
There are six default breakpoints, each corresponding to common device resolutions:
Breakpoint | Size (pixels) |
---|---|
xs | 320 |
sm | 640 |
md | 768 |
lg | 1024 |
xl | 1280 |
2xl | 1536 |
These values are customizable during component configuration. Refer to Setup Options.
Feedback and support
TwicPics Components are open-source on GitHub. For features requests and bugs, open an issue. The TwicPics team also remains available for support via the live chat (at the bottom right.)