add support for [ngClass] attribute (#187)

Author: bradlc

packages/tailwindcss-language-service/src/completionProvider.ts

@@ -158,14 +158,14 @@ function provideClassAttributeCompletions(
     end: position,
   })
 
-  const match = findLast(/(?:\s|:)class(?:Name)?=['"`{]/gi, str)
+  const match = findLast(/(?:\s|:)(?:class(?:Name)?|\[ngClass\])=['"`{]/gi, str)
 
   if (match === null) {
     return null
   }
 
   const lexer =
-    match[0][0] === ':'
+    match[0][0] === ':' || match[0].trim().startsWith('[ngClass]')
       ? getComputedClassAttributeLexer()
       : getClassAttributeLexer()
   lexer.reset(str.substr(match.index + match[0].length - 1))

packages/tailwindcss-language-service/src/util/find.ts

@@ -135,14 +135,14 @@ export function findClassListsInHtmlRange(
   range?: Range
 ): DocumentClassList[] {
   const text = doc.getText(range)
-  const matches = findAll(/(?:\s|:)class(?:Name)?=['"`{]/g, text)
+  const matches = findAll(/(?:\s|:)(?:class(?:Name)?|\[ngClass\])=['"`{]/g, text)
   const result: DocumentClassList[] = []
 
   matches.forEach((match) => {
     const subtext = text.substr(match.index + match[0].length - 1)
 
     let lexer =
-      match[0][0] === ':'
+      match[0][0] === ':' || match[0].trim().startsWith('[ngClass]')
         ? getComputedClassAttributeLexer()
         : getClassAttributeLexer()
     lexer.reset(subtext)