
Security News
Node.js Moves Toward Stable TypeScript Support with Amaro 1.0
Amaro 1.0 lays the groundwork for stable TypeScript support in Node.js, bringing official .ts loading closer to reality.
github.com/stanko/react-animate-height
Lightweight React component for animating height using CSS transitions.
Slide an element up and down or animate it to any specific height.
Content's opacity can be optionally animated as well (check animateOpacity
prop bellow).
CSS classes are applied in specific animation states, check animationStateClasses
prop.
For React >=16.3.0 make sure you are using v2.x.
Read more about React lifecycle changes introduced with React 16.3.
Live demo: muffinman.io/react-animate-height
Because multiple people asked how to animate list items, I created this simple example for that as well.
To build the examples locally, run:
npm install
npm start
Then open localhost:8080
in your browser of choice browser.
Or play with this sandbox.
Get it from npm
$ npm install --save react-animate-height
Import and use it in your React app.
import React, { Component } from 'react';
import AnimateHeight from 'react-animate-height';
export default class Example extends Component {
state = {
height: 0,
};
toggle = () => {
const { height } = this.state;
this.setState({
height: height === 0 ? 'auto' : 0,
});
};
render() {
const { height } = this.state;
return (
<div>
<button
aria-expanded={ height !== 0 }
aria-controls='example-panel'
onClick={ this.toggle }
>
{ height === 0 ? 'Open' : 'Close' }
</button>
<AnimateHeight
id='example-panel'
duration={ 500 }
height={ height } // see props documentation below
>
<h1>Your content goes here</h1>
<p>Put as many React or HTML components here.</p>
</AnimateHeight>
</div>
);
}
}
height: numeric or percentage value (ie. '50%'
) or 'auto'
, required
When changed, element height will be animated to that height.
To slide up use 0
, for slide down use 'auto'
duration: integer, default: 250
Duration of the animation in milliseconds
delay: integer, default: 0
Animation delay in milliseconds
easing: string, default: 'ease'
CSS easing function to be applied to the animation
id: string
HTML id
attribute.
className: string
CSS class to be applied to the element
Please note that you shouldn't apply properties that are messing with the layout (like display
, height
...), as these might break height calculations
style: object
CSS style object, it will be merged with inline styles of the component
Please note that you shouldn't apply properties that are messing with the layout (like display
, height
...), as these might break height calculations
contentClassName: string
CSS class to be applied to content wrapper element
Please note that you shouldn't apply properties that are messing with the layout (like display
, height
...), as these might break height calculations
animationStateClasses: object
Object containing CSS class names for animation states, default:
{
animating: 'rah-animating',
animatingUp: 'rah-animating--up',
animatingDown: 'rah-animating--down',
static: 'rah-static',
animatingToHeightZero: 'rah-animating--to-height-zero',
animatingToHeightAuto: 'rah-animating--to-height-auto',
animatingToHeightSpecific: 'rah-animating--to-height-specific',
staticHeightZero: 'rah-static--height-zero',
staticHeightAuto: 'rah-static--height-auto',
staticHeightSpecific: 'rah-static--height-specific',
}
Please note that this one will be merged with the default object and cached when component is created, so changing it afterwards will have no effect.
onAnimationStart: function
Callback which will be called when animation starts.
This first argument passed to this callback is an object containing newHeight
, the pixel value of the height at which the animation will end.
onAnimationEnd: function
Callback which will be called when animation ends.
This first argument passed to this callback is an object containing newHeight
, the pixel value of the height at which the animation ended.
applyInlineTransitions: boolean, default: true
If this flag is set to false
only CSS classes will be applied to the element and inline
transition styles will not be present.
animateOpacity: boolean, default: false
If set to true
content will fade-in (and fade-out) while height is animated.
aria-hidden: boolean
By default, library will set aria-hidden
to true
when height is zero. If you wish to override it, you can pass the prop yourself.
Additional props will be passed to the wrapper div, to make adding attrs like aria-*
easier.
Library will hide the content using display: hidden
when height props is 0. It will also apply aria-hidden="true"
in the same case, but you can override it by passing aria-hidden
prop yourself.
When using a button to toggle height, make sure you add aria-expanded
and aria-controls
to make everything accessible. Here's an example:
<button
aria-expanded={ height !== 0 }
aria-controls='example-panel' // it has to match the id passed to AnimateHeight
onClick={ toggleHeight } // your click handler that toggles height
// ... all other props
>
Toggle
</button>
<AnimateHeight id='example-panel'>
Content
</AnimateHeight>
Component checks for prefers-reduced-motion
in the constructor and disables animations if it set to true. Please note that component doesn't listen for potential changes of prefers-reduced-motion
option.
If AnimateHeight
is a flex child and it's parent has a fixed height, animation won't work.
To fix this, you just need to add the following CSS rule to the AnimateHeight
instance.
flex-shrink: 0;
You can do it by passing a className
or directly in the style
prop
<AnimateHeight style={{flexShrink: 0}}>
Check the issue #89 for the example and more details.
FAQs
Unknown package
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Amaro 1.0 lays the groundwork for stable TypeScript support in Node.js, bringing official .ts loading closer to reality.
Research
A deceptive PyPI package posing as an Instagram growth tool collects user credentials and sends them to third-party bot services.
Product
Socket now supports pylock.toml, enabling secure, reproducible Python builds with advanced scanning and full alignment with PEP 751's new standard.