feat(preset-mini): add backdrop:x variant for ::backdrop pseudo element

packages/preset-mini/src/variants/pseudo.ts

@@ -59,7 +59,11 @@ const PseudoClasses: Record<string, string> = Object.fromEntries([
   ['selection', '::selection'],
   ['marker', '::marker'],
   ['file', '::file-selector-button'],
-].map(key => typeof key === 'string' ? [key, `:${key}`] : key))
+].map(key => Array.isArray(key) ? key : [key, `:${key}`]))
+
+const PseudoClassesColon: Record<string, string> = Object.fromEntries([
+  ['backdrop', '::backdrop'],
+].map(key => Array.isArray(key) ? key : [key, `:${key}`]))
 
 const PseudoClassFunctions = [
   'not',
@@ -69,6 +73,7 @@ const PseudoClassFunctions = [
 ]
 
 const PseudoClassesStr = Object.entries(PseudoClasses).filter(([, pseudo]) => !pseudo.startsWith('::')).map(([key]) => key).join('|')
+const PseudoClassesColonStr = Object.entries(PseudoClassesColon).filter(([, pseudo]) => !pseudo.startsWith('::')).map(([key]) => key).join('|')
 const PseudoClassFunctionsStr = PseudoClassFunctions.join('|')
 
 const sortValue = (pseudo: string) => {
@@ -77,14 +82,15 @@ const sortValue = (pseudo: string) => {
 }
 
 const taggedPseudoClassMatcher = (tag: string, parent: string, combinator: string): VariantObject => {
-  const re = new RegExp(`^${tag}-((?:(${PseudoClassFunctionsStr})-)?(${PseudoClassesStr}))[:-]`)
   const rawRe = new RegExp(`^${escapeRegExp(parent)}:`)
+  const pseudoRE = new RegExp(`^${tag}-((?:(${PseudoClassFunctionsStr})-)?(${PseudoClassesStr}))[:-]`)
+  const pseudoColonRE = new RegExp(`^${tag}-((?:(${PseudoClassFunctionsStr})-)?(${PseudoClassesColonStr}))[:]`)
   return {
     name: `pseudo:${tag}`,
     match(input: string) {
-      const match = input.match(re)
+      const match = input.match(pseudoRE) || input.match(pseudoColonRE)
       if (match) {
-        let pseudo = PseudoClasses[match[3]] || `:${match[3]}`
+        let pseudo = PseudoClasses[match[3]] || PseudoClassesColon[match[3]] || `:${match[3]}`
         if (match[2])
           pseudo = `:${match[2]}(${pseudo})`
         return {
@@ -100,13 +106,15 @@ const taggedPseudoClassMatcher = (tag: string, parent: string, combinator: strin
 }
 
 const PseudoClassesAndElementsStr = Object.entries(PseudoClasses).map(([key]) => key).join('|')
+const PseudoClassesAndElementsColonStr = Object.entries(PseudoClassesColon).map(([key]) => key).join('|')
 const PseudoClassesAndElementsRE = new RegExp(`^(${PseudoClassesAndElementsStr})[:-]`)
+const PseudoClassesAndElementsColonRE = new RegExp(`^(${PseudoClassesAndElementsColonStr})[:]`)
 export const variantPseudoClassesAndElements: VariantObject = {
   name: 'pseudo',
   match: (input: string) => {
-    const match = input.match(PseudoClassesAndElementsRE)
+    const match = input.match(PseudoClassesAndElementsRE) || input.match(PseudoClassesAndElementsColonRE)
     if (match) {
-      const pseudo = PseudoClasses[match[1]] || `:${match[1]}`
+      const pseudo = PseudoClasses[match[1]] || PseudoClassesColon[match[1]] || `:${match[1]}`
       return {
         matcher: input.slice(match[0].length),
         selector: s => `${s}${pseudo}`,
@@ -119,20 +127,21 @@ export const variantPseudoClassesAndElements: VariantObject = {
 }
 
 const PseudoClassFunctionsRE = new RegExp(`^(${PseudoClassFunctionsStr})-(${PseudoClassesStr})[:-]`)
+const PseudoClassColonFunctionsRE = new RegExp(`^(${PseudoClassFunctionsStr})-(${PseudoClassesColonStr})[:]`)
 export const variantPseudoClassFunctions: VariantObject = {
   match: (input: string) => {
-    const match = input.match(PseudoClassFunctionsRE)
+    const match = input.match(PseudoClassFunctionsRE) || input.match(PseudoClassColonFunctionsRE)
     if (match) {
       const fn = match[1]
-      const pseudo = PseudoClasses[match[2]] || `:${match[2]}`
+      const pseudo = PseudoClasses[match[2]] || PseudoClassesColon[match[2]] || `:${match[2]}`
       return {
         matcher: input.slice(match[0].length),
         selector: s => `${s}:${fn}(${pseudo})`,
       }
     }
   },
   multiPass: true,
-  autocomplete: `(${PseudoClassFunctionsStr})-(${PseudoClassesStr}):`,
+  autocomplete: `(${PseudoClassFunctionsStr})-(${PseudoClassesStr}|${PseudoClassesColonStr}):`,
 }
 
 export const variantTaggedPseudoClasses = (options: PresetMiniOptions = {}): VariantObject[] => {

test/__snapshots__/preset-mini.test.ts.snap

@@ -408,6 +408,7 @@ div:hover .group-\\\\[div\\\\:hover\\\\]-\\\\[combinator\\\\:test-4\\\\]{combina
 .shadow{--un-shadow:var(--un-shadow-inset) 0 1px 3px 0 var(--un-shadow-color, rgba(0,0,0,0.1)),var(--un-shadow-inset) 0 1px 2px -1px var(--un-shadow-color, rgba(0,0,0,0.1));box-shadow:var(--un-ring-offset-shadow, 0 0 #0000), var(--un-ring-shadow, 0 0 #0000), var(--un-shadow);}
 .shadow-none{--un-shadow:0 0 var(--un-shadow-color, rgba(0,0,0,0));box-shadow:var(--un-ring-offset-shadow, 0 0 #0000), var(--un-ring-shadow, 0 0 #0000), var(--un-shadow);}
 .shadow-xl{--un-shadow:var(--un-shadow-inset) 0 20px 25px -5px var(--un-shadow-color, rgba(0,0,0,0.1)),var(--un-shadow-inset) 0 8px 10px -6px var(--un-shadow-color, rgba(0,0,0,0.1));box-shadow:var(--un-ring-offset-shadow, 0 0 #0000), var(--un-ring-shadow, 0 0 #0000), var(--un-shadow);}
+.backdrop\\\\:shadow-green::backdrop{--un-shadow-opacity:1;--un-shadow-color:rgba(74,222,128,var(--un-shadow-opacity));}
 .shadow-current{--un-shadow-color:currentColor;}
 .shadow-green-500{--un-shadow-opacity:1;--un-shadow-color:rgba(34,197,94,var(--un-shadow-opacity));}
 .shadow-green-900\\\\/50{--un-shadow-color:rgba(20,83,45,0.5);}

test/assets/preset-mini-targets.ts

@@ -824,6 +824,7 @@ export const presetMiniTargets: string[] = [
   'marker:bg-violet-200',
   'file:bg-violet-50',
   'hover:file:bg-violet-100',
+  'backdrop:shadow-green',
 
   // variants - pseudo classes
   'rtl:text-right',

test/preset-uno.test.ts

@@ -97,6 +97,9 @@ const nonTargets = [
   'tab-$',
   'ws-$',
 
+  // mini - pseudo colon only
+  'backdrop-shadow-green',
+
   // wind - placeholder
   '$-placeholder-red-200',