feat(runtime-dom): support !important for patchStyle. (#422)

packages/runtime-dom/__tests__/modules/style.spec.ts

@@ -0,0 +1,48 @@
+import { patchStyle } from '../../src/modules/style'
+
+describe(`module style`, () => {
+  it('string', () => {
+    const el = document.createElement('div')
+    patchStyle(el, {}, 'color:red')
+    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
+  })
+
+  it('plain object', () => {
+    const el = document.createElement('div')
+    patchStyle(el, {}, { color: 'red' })
+    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
+  })
+
+  it('camelCase', () => {
+    const el = document.createElement('div')
+    patchStyle(el, {}, { marginRight: '10px' })
+    expect(el.style.cssText.replace(/\s/g, '')).toBe('margin-right:10px;')
+  })
+
+  it('remove if falsy value', () => {
+    const el = document.createElement('div')
+    patchStyle(el, { color: 'red' }, { color: null })
+    expect(el.style.cssText.replace(/\s/g, '')).toBe('')
+  })
+
+  it('!important', () => {
+    const el = document.createElement('div')
+    patchStyle(el, {}, { color: 'red !important' })
+    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red!important;')
+  })
+
+  it('camelCase with !important', () => {
+    const el = document.createElement('div')
+    patchStyle(el, {}, { 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')
+    patchStyle(el, {}, { color: 'red', marginRight: '10px' })
+    expect(el.style.getPropertyValue('color')).toBe('red')
+    expect(el.style.getPropertyValue('margin-right')).toBe('10px')
+  })
+})