Iconify icon component for React.
npm install @iconify/reactIconify for React is not yet another icon component! There are many of them already.
What you get with other components:
- Limited set of icons.
- Large bundle size because all icons are bundled.
Iconify icon component is nothing like that. Component does not include any icon data, it is not tied to any specific icon set. Instead, all data is retrieved from public API on demand.
That means:
- One syntax for over 200,000 icons from 150+ icon sets.
- Renders SVG. Many components simply render icon fonts, which look ugly. Iconify renders pixel perfect SVG.
- Loads icons on demand. No need to bundle icons, component will automatically load icon data for icons that you use from Iconify API.
For more information about Iconify project visit https://iconify.design/.
For extended documentation visit Iconify for React documentation.
If you are using NPM:
``bash`
npm install --save-dev @iconify/react
If you are using Yarn:
`bash`
yarn add --dev @iconify/react
Install @iconify/react and import Icon from it:
`typescript`
import { Icon } from '@iconify/react';
Then use Icon component with icon name or data as "icon" parameter:
`jsx`
Component will automatically retrieve data for "mdi-light:home" from Iconify API and render it. There are over 200,000 icons available on Iconify API from various free and open source icon sets, including all the most popular icon sets.
This icon component is designed to be used with Iconify API, loading icon data on demand instead of bundling it.
If you want to use icons without Iconify API, there are many other options available.
Icon name is a string. Few examples:
- @api-provider:icon-set-prefix:icon-namemdi-light:home
- (in this example API provider is empty, so it is skipped)
It has 3 parts, separated by ":":
- provider points to API source. Starts with "@", can be empty (empty value is used for public Iconify API).
- prefix is name of icon set.
- name is name of icon.
See Iconify for React icon names documentation for more detailed explanation.
Instead of icon name, you can pass icon data to component:
`jsx
import { Icon } from '@iconify/react';
import home from '@iconify-icons/mdi-light/home';
function renderHomeIcon() {
return
}
`
See icon packages documentation for more details.
Example above will currently fail with Next.js. This is because Next.js uses outdated packaging software that does not support ES modules. But do not worry, there is a simple solution: switch to CommonJS icon packages.
To switch to CommonJS package, replace this line in example above:
`js`
import home from '@iconify-icons/mdi-light/home';
with
`js`
import home from '@iconify/icons-mdi-light/home';
All icons are available as ES modules for modern bundler and as CommonJS modules for outdated bundlers. ES modules use format @iconify-icons/{prefix}, CommonJS modules use @iconify/icons-{prefix}.
For more details, see icon packages documentation.
Icons have 2 modes: inline and block. Difference between modes is vertical-align that is added to inline icons.
Inline icons are aligned slightly below baseline, so they look centred compared to text, like glyph fonts.
Block icons do not have alignment, like images, which aligns them to baseline by default.
Alignment option was added to make icons look like continuation of text, behaving like glyph fonts. This should make migration from glyph fonts easier.
`jsx
import React from 'react';
import { Icon, InlineIcon } from '@iconify/react';
export function inlineDemo() {
return (
Block:
Inline:
To toggle between block and inline modes, you can either use
InlineIcon or use boolean inline property:`jsx
import React from 'react';
import { Icon } from '@iconify/react';export function inlineDemo() {
return (
Block:
Inline:
);
}
`Visual example to show the difference between inline and block modes:
Icon component properties
icon property is mandatory. It tells component what icon to render. The value can be a string containing the icon name or an object containing the icon data.The icon component has the following optional properties:
-
inline. Changes icon behaviour to match icon fonts. See "Inline icon" section above.
- width and height. Icon dimensions. The default values are "1em" for both. See "Dimensions" section below.
- color. Icon colour. This is the same as setting colour in style. See "Icon colour" section below.
- flip, hFlip, vFlip. Flip icon horizontally and/or vertically. See "Transformations" section below.
- rotate. Rotate icon by 90, 180 or 270 degrees. See "Transformations" section below.
- align, vAlign, hAlign, slice. Icon alignment. See "Alignment" section below.
- onLoad. Callback function that is called when icon data has been loaded. See "onLoad" section below.$3
In addition to the properties mentioned above, the icon component accepts any other properties and events. All other properties and events will be passed to generated
SVG element, so you can do stuff like assigning onClick event, setting the inline style, add title and so on.$3
By default, icon height is "1em". With is dynamic, calculated using the icon's width to height ratio. This makes it easy to change icon size by changing
font-size in the stylesheet, just like icon fonts.There are several ways to change icon dimensions:
- Setting
font-size in style (or fontSize if you are using inline style).
- Setting width and/or height property.Values for
width and height can be numbers or strings.If you set only one dimension, another dimension will be calculated using the icon's width to height ratio. For example, if the icon size is 16 x 24, you set the height to 48, the width will be set to 32. Calculations work not only with numbers, but also with string values.
#### Dimensions as numbers
You can use numbers for
width and height.`jsx
``jsx
`Number values are treated as pixels. That means in examples above, values are identical to "24px" and "16px".
#### Dimensions as strings without units
If you use strings without units, they are treated the same as numbers in an example above.
`jsx
``jsx
`#### Dimensions as strings with units
You can use units in width and height values:
`jsx
`Be careful when using
calc, view port based units or percentages. In SVG element they might not behave the way you expect them to behave and when using such units, you should consider settings both width and height.#### Dimensions as 'auto'
Keyword "auto" sets dimensions to the icon's
viewBox dimensions. For example, for 24 x 24 icon using height="auto" sets height to 24 pixels.`jsx
`$3
There are two types of icons: icons that do not have a palette and icons that do have a palette.
Icons that do have a palette, such as emojis, cannot be customised. Setting colour to such icons will not change anything.
Icons that do not have a palette can be customised. By default, colour is set to "currentColor", which means the icon's colour matches text colour. To change the colour you can:
- Set
color style or use stylesheet to target icon. If you are using the stylesheet, target svg element.
- Add color property.Examples:
Using
color property:`jsx
`Using inline style:
`jsx
`Using stylesheet:
`jsx
``css
.red-icon {
color: red;
}
`$3
You can rotate and flip the icon.
This might seem redundant because icon can also be rotated and flipped using CSS transformations. So why do transformation properties exist? Because it is a different type of transformation.
- CSS transformations transform the entire icon.
- Icon transformations transform the contents of the icon.
If you have a square icon, this makes no difference. However, if you have an icon that has different width and height values, it makes a huge difference.
Rotating 16x24 icon by 90 degrees results in:
- CSS transformation keeps 16x24 bounding box, which might cause the icon to overlap text around it.
- Icon transformation changes bounding box to 24x16, rotating content inside an icon.
See icon transformations documentation for more details.
#### Flipping an icon
There are several properties available to flip an icon:
-
hFlip: boolean property, flips icon horizontally.
- vFlip: boolean property, flips icon vertically.
- flip: shorthand string property, can flip icon horizontally and/or vertically.Examples:
Flip an icon horizontally:
`jsx
`Flip an icon vertically:
`jsx
`Flip an icon horizontally and vertically (the same as 180 degrees rotation):
`jsx
`#### Rotating an icon
An icon can be rotated by 90, 180 and 270 degrees. Only contents of the icon are rotated.
To rotate an icon, use
rotate property. Value can be a string (degrees or percentages) or a number.Number values are 1 for 90 degrees, 2 for 180 degrees, 3 for 270 degrees.
Examples of 90 degrees rotation:
`jsx
`$3
onLoad property is an optional callback function. It is called when icon data has been loaded.It is not an event, such as
onClick event for links, it is a simple callback function.When
onLoad is called:- If value of icon property is an object,
onLoad is not called.
- If value of icon property is a string and icon data is available, onLoad is called on first render.
- If value of icon property is a string and icon data is not available, onLoad is called on first re-render after icon data is retrieved from API.What is the purpose of
onLoad`? To let you know when Icon component renders an icon and when it does not render anything. This allows you to do things like adding class name for parent element, such as "container--with-icon" that modify layout if icon is being displayed.For extended documentation visit Iconify for React documentation.
React component is released with MIT license.
© 2019-PRESENT Vjacheslav Trushkin
See Iconify icon sets page for list of collections and their licenses.