forked from vuejs/core
/
patchStyle.spec.ts
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/
patchStyle.spec.ts
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import { patchProp } from '../src/patchProp'
describe(`runtime-dom: style patching`, () => {
it('string', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, 'color:red')
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
})
// #1309
it('should not patch same string style', () => {
const el = document.createElement('div')
const fn = jest.fn()
const value = (el.style.cssText = 'color:red;')
Object.defineProperty(el.style, 'cssText', {
get(): any {
return value
},
set: fn
})
patchProp(el, 'style', value, value)
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
expect(fn).not.toBeCalled()
})
it('plain object', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, { color: 'red' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
})
it('camelCase', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, { marginRight: '10px' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('margin-right:10px;')
})
it('remove if falsy value', () => {
const el = document.createElement('div')
patchProp(el, 'style', null, {
color: undefined,
borderRadius: null
})
expect(el.style.cssText.replace(/\s/g, '')).toBe('')
patchProp(
el,
'style',
{ color: 'red' },
{ color: null, borderRadius: undefined }
)
expect(el.style.cssText.replace(/\s/g, '')).toBe('')
})
it('!important', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, { color: 'red !important' })
expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red!important;')
})
it('camelCase with !important', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, { marginRight: '10px !important' })
expect(el.style.cssText.replace(/\s/g, '')).toBe(
'margin-right:10px!important;'
)
})
it('object with multiple entries', () => {
const el = document.createElement('div')
patchProp(el, 'style', {}, { color: 'red', marginRight: '10px' })
expect(el.style.getPropertyValue('color')).toBe('red')
expect(el.style.getPropertyValue('margin-right')).toBe('10px')
})
it('patch with falsy style value', () => {
const el = document.createElement('div')
patchProp(el as any, 'style', { width: '100px' }, { width: 0 })
expect(el.style.width).toBe('0px')
})
it('should remove style attribute on falsy value', () => {
const el = document.createElement('div')
el.style.cssText = 'color: red;'
patchProp(el as any, 'style', {}, null)
expect(el.hasAttribute('style')).toBe(false)
expect(el.style.cssText).toBe('')
})
it('should warn for trailing semicolons', () => {
const el = document.createElement('div')
patchProp(el, 'style', null, { color: 'red;' })
expect(
`Unexpected semicolon at the end of 'color' style value: 'red;'`
).toHaveBeenWarned()
patchProp(el, 'style', null, { '--custom': '100; ' })
expect(
`Unexpected semicolon at the end of '--custom' style value: '100; '`
).toHaveBeenWarned()
})
it('should not warn for escaped trailing semicolons', () => {
const el = document.createElement('div')
patchProp(el, 'style', null, { '--custom': '100\\;' })
expect(el.style.getPropertyValue('--custom')).toBe('100\\;')
})
it('shorthand properties', () => {
const el = document.createElement('div')
patchProp(
el as any,
'style',
{ borderBottom: '1px solid red' },
{ border: '1px solid green' }
)
expect(el.style.border).toBe('1px solid green')
expect(el.style.borderBottom).toBe('1px solid green')
})
// JSDOM doesn't support custom properties on style object so we have to
// mock it here.
function mockElementWithStyle() {
const store: any = {}
return {
style: {
display: '',
WebkitTransition: '',
setProperty(key: string, val: string) {
store[key] = val
},
getPropertyValue(key: string) {
return store[key]
}
}
}
}
it('CSS custom properties', () => {
const el = mockElementWithStyle()
patchProp(el as any, 'style', {}, { '--theme': 'red' } as any)
expect(el.style.getPropertyValue('--theme')).toBe('red')
})
it('auto vendor prefixing', () => {
const el = mockElementWithStyle()
patchProp(el as any, 'style', {}, { transition: 'all 1s' })
expect(el.style.WebkitTransition).toBe('all 1s')
})
it('multiple values', () => {
const el = mockElementWithStyle()
patchProp(
el as any,
'style',
{},
{ display: ['-webkit-box', '-ms-flexbox', 'flex'] }
)
expect(el.style.display).toBe('flex')
})
})