forked from emotion-js/emotion
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index.js
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index.js
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// @flow
import * as React from 'react'
import type { ElementType } from 'react'
import {
getDefaultShouldForwardProp,
type StyledOptions,
type CreateStyled,
type CreateStyledComponent,
type StyledComponent
} from './utils'
import { withEmotionCache, ThemeContext } from '@emotion/core'
import { getRegisteredStyles, insertStyles } from '@emotion/utils'
import { serializeStyles } from '@emotion/serialize'
const ILLEGAL_ESCAPE_SEQUENCE_ERROR = `You have illegal escape sequence in your template literal, most likely inside content's property value.
Because you write your CSS inside a JavaScript string you actually have to do double escaping, so for example "content: '\\00d7';" should become "content: '\\\\00d7';".
You can read more about this here:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#ES2018_revision_of_illegal_escape_sequences`
let isBrowser = typeof document !== 'undefined'
let createStyled: CreateStyled = (tag: any, options?: StyledOptions) => {
if (process.env.NODE_ENV !== 'production') {
if (tag === undefined) {
throw new Error(
'You are trying to create a styled element with an undefined component.\nYou may have forgotten to import it.'
)
}
}
let identifierName
let shouldForwardProp
let targetClassName
if (options !== undefined) {
identifierName = options.label
targetClassName = options.target
shouldForwardProp =
tag.__emotion_forwardProp && options.shouldForwardProp
? propName =>
tag.__emotion_forwardProp(propName) &&
// $FlowFixMe
options.shouldForwardProp(propName)
: options.shouldForwardProp
}
const isReal = tag.__emotion_real === tag
const baseTag = (isReal && tag.__emotion_base) || tag
if (typeof shouldForwardProp !== 'function' && isReal) {
shouldForwardProp = tag.__emotion_forwardProp
}
let defaultShouldForwardProp =
shouldForwardProp || getDefaultShouldForwardProp(baseTag)
const shouldUseAs = !defaultShouldForwardProp('as')
return (function() {
let args = arguments
let styles =
isReal && tag.__emotion_styles !== undefined
? tag.__emotion_styles.slice(0)
: []
if (identifierName !== undefined) {
styles.push(`label:${identifierName};`)
}
if (args[0] == null || args[0].raw === undefined) {
styles.push.apply(styles, args)
} else {
if (process.env.NODE_ENV !== 'production' && args[0][0] === undefined) {
console.error(ILLEGAL_ESCAPE_SEQUENCE_ERROR)
}
styles.push(args[0][0])
let len = args.length
let i = 1
for (; i < len; i++) {
if (process.env.NODE_ENV !== 'production' && args[0][i] === undefined) {
console.error(ILLEGAL_ESCAPE_SEQUENCE_ERROR)
}
styles.push(args[i], args[0][i])
}
}
const Styled: StyledComponent = withEmotionCache((props, context, ref) => {
return (
<ThemeContext.Consumer>
{theme => {
const finalTag = (shouldUseAs && props.as) || baseTag
let className = ''
let classInterpolations = []
let mergedProps = props
if (props.theme == null) {
mergedProps = {}
for (let key in props) {
mergedProps[key] = props[key]
}
mergedProps.theme = theme
}
if (typeof props.className === 'string') {
className = getRegisteredStyles(
context.registered,
classInterpolations,
props.className
)
} else if (props.className != null) {
className = `${props.className} `
}
const serialized = serializeStyles(
styles.concat(classInterpolations),
context.registered,
mergedProps
)
const rules = insertStyles(
context,
serialized,
typeof finalTag === 'string'
)
className += `${context.key}-${serialized.name}`
if (targetClassName !== undefined) {
className += ` ${targetClassName}`
}
const finalShouldForwardProp =
shouldUseAs && shouldForwardProp === undefined
? getDefaultShouldForwardProp(finalTag)
: defaultShouldForwardProp
let newProps = {}
for (let key in props) {
if (shouldUseAs && key === 'as') continue
if (
// $FlowFixMe
finalShouldForwardProp(key)
) {
newProps[key] = props[key]
}
}
newProps.className = className
newProps.ref = ref || props.innerRef
if (process.env.NODE_ENV !== 'production' && props.innerRef) {
console.error(
'`innerRef` is deprecated and will be removed in a future major version of Emotion, please use the `ref` prop instead' +
(identifierName === undefined
? ''
: ` in the usage of \`${identifierName}\``)
)
}
const ele = React.createElement(finalTag, newProps)
if (!isBrowser && rules !== undefined) {
let serializedNames = serialized.name
let next = serialized.next
while (next !== undefined) {
serializedNames += ' ' + next.name
next = next.next
}
return (
<React.Fragment>
<style
{...{
[`data-emotion-${context.key}`]: serializedNames,
dangerouslySetInnerHTML: { __html: rules },
nonce: context.sheet.nonce
}}
/>
{ele}
</React.Fragment>
)
}
return ele
}}
</ThemeContext.Consumer>
)
})
Styled.displayName =
identifierName !== undefined
? identifierName
: `Styled(${
typeof baseTag === 'string'
? baseTag
: baseTag.displayName || baseTag.name || 'Component'
})`
Styled.defaultProps = tag.defaultProps
Styled.__emotion_real = Styled
Styled.__emotion_base = baseTag
Styled.__emotion_styles = styles
Styled.__emotion_forwardProp = shouldForwardProp
Object.defineProperty(Styled, 'toString', {
value() {
if (
targetClassName === undefined &&
process.env.NODE_ENV !== 'production'
) {
return 'NO_COMPONENT_SELECTOR'
}
// $FlowFixMe
return `.${targetClassName}`
}
})
Styled.withComponent = (
nextTag: ElementType,
nextOptions?: StyledOptions
) => {
return createStyled(
nextTag,
nextOptions !== undefined
? { ...(options || {}), ...nextOptions }
: options
)(...styles)
}
return Styled
}: CreateStyledComponent)
}
export default createStyled