# react-responsive-ui
[](https://www.npmjs.com/package/react-responsive-ui)
Responsive React UI components.
[See Demo](https://catamphetamine.gitlab.io/react-responsive-ui/)
## GitHub
On March 9th, 2020, GitHub, Inc. silently [banned](https://medium.com/@catamphetamine/how-github-blocked-me-and-all-my-libraries-c32c61f061d3) my account (and all my libraries) without any notice. I opened a support ticked but they didn't answer. Because of that, I had to move all my libraries to [GitLab](https://gitlab.com/catamphetamine).
## Install
```
npm install react-responsive-ui --save
```
React >= 16.3 is required.
## Use
See the [demo page](https://catamphetamine.gitlab.io/react-responsive-ui/). It has code examples for every component.
## CSS
The CSS for this library resides in `react-responsive-ui/style.css` file and should be included on a page.
The stylesheet uses [native CSS variables](https://medium.freecodecamp.org/learn-css-variables-in-5-minutes-80cf63b4025d) for easier styling. See [`variables.css`](https://gitlab.com/catamphetamine/react-responsive-ui/blob/master/variables.css) for the list of all available variables. These variables have some sensible defaults which can be overridden:
```css
:root {
--rrui-unit : 12px;
--rrui-white-color : white;
--rrui-black-color : black;
--rrui-accent-color : blue;
--rrui-accent-color-light : cyan;
--rrui-gray-color : gray;
}
```
Native CSS variables work in all modern browsers, but older ones like Internet Explorer [wont't support them](https://caniuse.com/#search=var). For compatibility with such older browsers one can use a CSS transformer like [PostCSS](http://postcss.org/) with a "CSS custom properties" plugin like [`postcss-custom-properties`](https://github.com/postcss/postcss-custom-properties).
#### When using Webpack
```js
// React Responsive UI.
require('react-responsive-ui/style.css')
// Custom variable values.
require('./src/styles/react-responsive-ui-custom-variable-values.css')
```
And set up a [`postcss-loader`](https://github.com/postcss/postcss-loader) with a [CSS autoprefixer](https://github.com/postcss/autoprefixer) for supporting old web browsers.
#### When not using Webpack
Get the `style.css` file from this package, process it with a [CSS autoprefixer](https://github.com/postcss/autoprefixer) for supporting old web browsers, and then include it on a page.
```html
```
## Small Screen
The [`small-screen`](https://gitlab.com/catamphetamine/react-responsive-ui/tree/master/small-screen) directory contains "small screen" ("mobile devices") styles for some of the components. For example, ``s, ``s, ``s, ``s can open in fullscreen (not neccessarily a good idea though). ``s have less padding and ``s are full-width. These CSS files may also use [native CSS variables](https://medium.freecodecamp.org/learn-css-variables-in-5-minutes-80cf63b4025d).
Native CSS [`@import`](https://developer.mozilla.org/docs/Web/CSS/@import) example:
```css
/* Main style. */
@import url(~react-responsive-ui/style.css)
/* Less padding on ``s on mobile devices. */
@import url(~react-responsive-ui/small-screen/Modal.css) (max-width: 768px)
/* Full-width ``s on mobile devices. */
@import url(~react-responsive-ui/small-screen/Snackbar.css) (max-width: 768px)
/* Places a click-capturing overlay above `` input
so that the `` is not focused on touch meaning that the
keyboard won't slide in when the user taps the `` input. */
@import url(~react-responsive-ui/small-screen/DatePicker.InputOverlay.css) (max-width: 768px)
```
## Validation
Each form component can be passed an `error: String` property. When passed, the component will be styled as "invalid" and the `error` will be displayed under the component.
## Asterisk on required fields
To show asterisks (`*`) on required fields' labels:
When field `value` is empty:
```css
/* (when the `value` is empty) */
/* Required input field labels will have asterisks. */
.rrui__input-label--required:after {
content: '*';
margin-left: 0.2em;
}
```
Regardless of whether the field `value` is empty or not:
```css
/* (regardless of whether the `value` is empty or not) */
/* Required input field labels will have asterisks. */
.rrui__input-label--required-field:after {
content: '*';
margin-left: 0.2em;
}
```
## Supported Browsers
IE 11, Edge, Firefox, Chrome, Safari (macOS, iOS) — have been tested.
Expandable components (`Select`, `Autocomplete`, `ExpandableMenu`) require `Promise` which is not present in IE 11 and requires a `Promise` polyfill to be included on a page.
## Reducing footprint
Webpack 4 still can't "tree-shake" simple cases like
```js
import { Modal, Button, TextInput } from 'react-responsive-ui'
```
So if one's using only a small subset of this library it could be imported like so:
```js
import Modal from 'react-responsive-ui/modules/Modal'
import Button from 'react-responsive-ui/modules/Button'
import TextInput from 'react-responsive-ui/modules/TextInput'
```
or for CommonJS:
```js
import Modal from 'react-responsive-ui/commonjs/Modal'
import Button from 'react-responsive-ui/commonjs/Button'
import TextInput from 'react-responsive-ui/commonjs/TextInput'
```
Which results in a much smaller bundle size.
Theoretically the same thing can be done for CSS: instead of importing the whole `react-responsive-ui/style.css` bundle one could import only the necessary styles from `react-responsive-ui/styles/` like `react-responsive-ui/styles/Button.css`, but there's a catch: various components are usually dependent on different styles; for example, a `` actually requires three different stylesheets to be imported:
* `react-responsive-ui/styles/Button.css`
* `react-responsive-ui/styles/ButtonReset.css`
* `react-responsive-ui/styles/Input.css`
## Outline
By default all buttons and inputs have `rrui__outline` CSS class attached to them which hides the default browser outline for focused components.
```css
.rrui__outline:not(.rrui__outline--default) {
outline: none;
}
```
Instead of using the default browser outline which doesn't look pretty by any standards and which nobody uses (not "Google", not "Apple", not anyone else) the default `react-responsive-ui` styles define some custom `:focus` styling for most cases (though not for all of them). Still, these out-of-the-box `:focus` styles are quite subtle and if a developer is implementing a [WAI-ARIA](https://developers.google.com/web/fundamentals/accessibility/)-compliant website then they should make sure that those `:focus` styles are more pronounced in each case.
Alternatively, those looking for a very-quick-and-dirty solution can use the same default browser outline, but prettier.
```css
.rrui__outline:focus {
box-shadow: 0 0 0 0.15rem #00aaff;
}
```
If a developer still prefers the default browser outline then they still can manually add `rrui__outline--default` CSS class to buttons and inputs to prevent `outline: none` CSS rule from being applied.
There's also an exported component called `` which listens to `keydown` events on `document.body`, and when it detects a `Tab` key being pressed it adds `rrui__tabbing` CSS class to `document.body`. Any further mouse or touch events reset the `rrui__tabbing` CSS class. This way `rrui__outline` can only be shown when the user is actually tabbing. It's still not considered a 100%-formally-correct solution because "screen readers" still emit all kinds of mouse events, or maybe some "screen readers" hypothetically don't emit a "keydown" event for the `Tab` key — who knows. It's more of an experimental feature. There're some other possible ideas like `./source/Interaction.js`.
## Inspecting Expandables
Expandables are implemented in such a way that they collapse when losing focus. This may present difficulties when trying to inspect expandable content via DevTools because switching to DevTools captures focus causing expandables to collapse. For such cases there's a global debug flag `window.rruiCollapseOnFocusOut` which can be set to `false` to prevent expandables from collapsing when losing focus. This flag affects: ``, ``, ``, ``, ``, ``, ``.
## Known Issues
An overflown `` scroll is janky on iOS because it tries to scroll `` instead of the `