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fix(runtime-dom): clear prev style with string and object #10313

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fix(runtime-dom): clear prev style with string and object #10313

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15 changes: 15 additions & 0 deletions packages/runtime-dom/__tests__/patchStyle.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,21 @@ describe(`runtime-dom: style patching`, () => {
expect(el.style.getPropertyValue('--custom')).toBe('100\\;')
})

it('should clear prev style with string and object', () => {
let el = document.createElement('div')
patchProp(el, 'style', null, { color: 'red' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
patchProp(el, 'style', { color: 'red' }, { fontSize: '12px' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('font-size:12px;')

// reset el
el = document.createElement('div')
patchProp(el, 'style', null, 'color: red')
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
patchProp(el, 'style', 'color: red', { fontSize: '12px' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('font-size:12px;')
})

it('shorthand properties', () => {
const el = document.createElement('div')
patchProp(
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26 changes: 21 additions & 5 deletions packages/runtime-dom/src/modules/style.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,15 @@ const displayRE = /(^|;)\s*display\s*:/

export function patchStyle(el: Element, prev: Style, next: Style) {
const style = (el as HTMLElement).style
const isCssString = isString(next)
const currentDisplay = style.display
let hasControlledDisplay = false
if (next && !isCssString) {
if (prev && !isString(prev)) {
for (const key in prev) {

const isNextString = isString(next)

if (next && !isNextString) {
const prevObj = isString(prev) ? parseStyleText(prev as string) : prev
if (prevObj) {
for (const key in prevObj) {
if (next[key] == null) {
setStyle(style, key, '')
}
Expand All @@ -27,7 +30,7 @@ export function patchStyle(el: Element, prev: Style, next: Style) {
setStyle(style, key, next[key])
}
} else {
if (isCssString) {
if (isNextString) {
if (prev !== next) {
// #9821
const cssVarText = (style as any)[CSS_VAR_TEXT]
Expand All @@ -50,6 +53,19 @@ export function patchStyle(el: Element, prev: Style, next: Style) {
}
}

function parseStyleText(cssText: string) {
const res: Record<string, string> = {}
const listDelimiter = /;(?![^(]*\))/g
const propertyDelimiter = /:(.+)/
cssText.split(listDelimiter).forEach(function (item) {
if (item) {
const tmp = item.split(propertyDelimiter)
tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim())
}
})
return res
}

const semicolonRE = /[^\\];\s*$/
const importantRE = /\s*!important$/

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