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Add: use an object for the style prop & add className #32

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Add: use an object for the style prop & add className #32

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c631226
use an object for the style prop & add className
Sliect Oct 30, 2020
61e381c
example
Sliect Oct 30, 2020
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26 changes: 24 additions & 2 deletions didact.js
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,14 @@ function updateDom(dom, prevProps, nextProps) {
.filter(isProperty)
.filter(isNew(prevProps, nextProps))
.forEach(name => {
dom[name] = nextProps[name]
if (name === 'style') { // update style
transformDomStyle(dom, nextProps.style)
} else if (name === 'className') { // update className
prevProps.className && dom.classList.remove(...prevProps.className.split(/\s+/))
dom.classList.add(...nextProps.className.split(/\s+/))
} else {
dom[name] = nextProps[name]
}
})

// Add event listeners
Expand All @@ -89,6 +96,21 @@ function updateDom(dom, prevProps, nextProps) {
})
}

const reg = /[A-Z]/g
function transformDomStyle(dom, style) {
dom.style = Object.keys(style)
.reduce((acc, styleName) => {
const key = styleName.replace(
reg,
function(v) {
return '-' + v.toLowerCase()
}
)
acc += `${key}: ${style[styleName]};`
return acc
}, '')
}

function commitRoot() {
deletions.forEach(commitWork)
commitWork(wipRoot.child)
Expand Down Expand Up @@ -309,7 +331,7 @@ const Didact = {
function Counter() {
const [state, setState] = Didact.useState(1)
return (
<h1 onClick={() => setState(c => c + 1)}>
<h1 style={{marginTop: '100px', textAlign: 'center'}} className={'foo bar'} onClick={() => setState(c => c + 1)}>
Count: {state}
</h1>
)
Expand Down