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import { Lookup } from '@react-spring/types'
const isCustomPropRE = /^--/
type Value = string | number | boolean | null
function dangerousStyleValue(name: string, value: Value) {
if (value == null || typeof value === 'boolean' || value === '') return ''
if (
typeof value === 'number' &&
value !== 0 &&
!isCustomPropRE.test(name) &&
!(isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name])
)
return value + 'px'
// Presumes implicit 'px' suffix for unitless numbers
return ('' + value).trim()
}
const attributeCache: Lookup<string> = {}
type Instance = HTMLDivElement & { style?: Lookup }
export function applyAnimatedValues(instance: Instance, props: Lookup) {
if (!instance.nodeType || !instance.setAttribute) {
return false
}
const isFilterElement =
instance.nodeName === 'filter' ||
(instance.parentNode && instance.parentNode.nodeName === 'filter')
const {
className,
style,
children,
scrollTop,
scrollLeft,
viewBox,
...attributes
} = props!
const values = Object.values(attributes)
const names = Object.keys(attributes).map(name =>
isFilterElement || instance.hasAttribute(name)
? name
: attributeCache[name] ||
(attributeCache[name] = name.replace(
/([A-Z])/g,
// Attributes are written in dash case
n => '-' + n.toLowerCase()
))
)
if (children !== void 0) {
instance.textContent = children
}
// Apply CSS styles
for (const name in style) {
if (style.hasOwnProperty(name)) {
const value = dangerousStyleValue(name, style[name])
if (isCustomPropRE.test(name)) {
instance.style.setProperty(name, value)
} else {
instance.style[name] = value
}
}
}
// Apply DOM attributes
names.forEach((name, i) => {
instance.setAttribute(name, values[i])
})
if (className !== void 0) {
instance.className = className
}
if (scrollTop !== void 0) {
instance.scrollTop = scrollTop
}
if (scrollLeft !== void 0) {
instance.scrollLeft = scrollLeft
}
if (viewBox !== void 0) {
instance.setAttribute('viewBox', viewBox)
}
}
let isUnitlessNumber: { [key: string]: true } = {
animationIterationCount: true,
borderImageOutset: true,
borderImageSlice: true,
borderImageWidth: true,
boxFlex: true,
boxFlexGroup: true,
boxOrdinalGroup: true,
columnCount: true,
columns: true,
flex: true,
flexGrow: true,
flexPositive: true,
flexShrink: true,
flexNegative: true,
flexOrder: true,
gridRow: true,
gridRowEnd: true,
gridRowSpan: true,
gridRowStart: true,
gridColumn: true,
gridColumnEnd: true,
gridColumnSpan: true,
gridColumnStart: true,
fontWeight: true,
lineClamp: true,
lineHeight: true,
opacity: true,
order: true,
orphans: true,
tabSize: true,
widows: true,
zIndex: true,
zoom: true,
// SVG-related properties
fillOpacity: true,
floodOpacity: true,
stopOpacity: true,
strokeDasharray: true,
strokeDashoffset: true,
strokeMiterlimit: true,
strokeOpacity: true,
strokeWidth: true,
}
const prefixKey = (prefix: string, key: string) =>
prefix + key.charAt(0).toUpperCase() + key.substring(1)
const prefixes = ['Webkit', 'Ms', 'Moz', 'O']
isUnitlessNumber = Object.keys(isUnitlessNumber).reduce((acc, prop) => {
prefixes.forEach(prefix => (acc[prefixKey(prefix, prop)] = acc[prop]))
return acc
}, isUnitlessNumber)
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