diff --git a/packages/tailwindcss-language-service/src/codeActions/provideInvalidApplyCodeActions.ts b/packages/tailwindcss-language-service/src/codeActions/provideInvalidApplyCodeActions.ts
index 3dbfb20..3730492 100644
--- a/packages/tailwindcss-language-service/src/codeActions/provideInvalidApplyCodeActions.ts
+++ b/packages/tailwindcss-language-service/src/codeActions/provideInvalidApplyCodeActions.ts
@@ -17,6 +17,7 @@ import { cssObjToAst } from '../util/cssObjToAst'
 import { dset } from 'dset'
 import selectorParser from 'postcss-selector-parser'
 import { flatten } from '../util/array'
+import { getTextWithoutComments } from '../util/doc'
 
 export async function provideInvalidApplyCodeActions(
   state: State,
@@ -24,7 +25,7 @@ export async function provideInvalidApplyCodeActions(
   diagnostic: InvalidApplyDiagnostic
 ): Promise<CodeAction[]> {
   let document = state.editor.documents.get(params.textDocument.uri)
-  let documentText = document.getText()
+  let documentText = getTextWithoutComments(document, 'css')
   let cssRange: Range
   let cssText = documentText
   const { postcss } = state.modules
@@ -47,7 +48,7 @@ export async function provideInvalidApplyCodeActions(
       .filter((b) => b.type === 'css')
       .find(({ range }) => isWithinRange(diagnostic.range.start, range))?.range
     if (!cssRange) return []
-    cssText = document.getText(cssRange)
+    cssText = getTextWithoutComments(document, 'css', cssRange)
   }
 
   try {
diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
index 9eac0b2..716ce2c 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidConfigPathDiagnostics.ts
@@ -10,6 +10,7 @@ import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
 import { combinations } from '../util/combinations'
 import dlv from 'dlv'
+import { getTextWithoutComments } from '../util/doc'
 
 function pathToString(path: string | string[]): string {
   if (typeof path === 'string') return path
@@ -177,7 +178,7 @@ export function getInvalidConfigPathDiagnostics(
   }
 
   ranges.forEach((range) => {
-    let text = document.getText(range)
+    let text = getTextWithoutComments(document, 'css', range)
     let matches = findAll(
       /(?<prefix>\s|^)(?<helper>config|theme)\((?<quote>['"])(?<key>[^)]+)\k<quote>[^)]*\)/g,
       text
diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidScreenDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidScreenDiagnostics.ts
index 587f1b1..c9a9a75 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidScreenDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidScreenDiagnostics.ts
@@ -7,6 +7,7 @@ import { findAll, indexToPosition } from '../util/find'
 import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
 import dlv from 'dlv'
+import { getTextWithoutComments } from '../util/doc'
 
 export function getInvalidScreenDiagnostics(
   state: State,
@@ -28,7 +29,7 @@ export function getInvalidScreenDiagnostics(
   }
 
   ranges.forEach((range) => {
-    let text = document.getText(range)
+    let text = getTextWithoutComments(document, 'css', range)
     let matches = findAll(/(?:\s|^)@screen\s+(?<screen>[^\s{]+)/g, text)
 
     matches.forEach((match) => {
diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
index d6a9c50..59f6de7 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
@@ -7,6 +7,7 @@ import { findAll, indexToPosition } from '../util/find'
 import * as semver from '../util/semver'
 import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
+import { getTextWithoutComments } from '../util/doc'
 
 export function getInvalidTailwindDirectiveDiagnostics(
   state: State,
@@ -42,7 +43,7 @@ export function getInvalidTailwindDirectiveDiagnostics(
   let hasVariantsDirective = state.jit && semver.gte(state.version, '2.1.99')
 
   ranges.forEach((range) => {
-    let text = document.getText(range)
+    let text = getTextWithoutComments(document, 'css', range)
     let matches = findAll(regex, text)
 
     let valid = [
diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidVariantDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidVariantDiagnostics.ts
index 1ede7ec..1b6c997 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidVariantDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidVariantDiagnostics.ts
@@ -7,6 +7,7 @@ import { findAll, indexToPosition } from '../util/find'
 import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
 import * as semver from '../util/semver'
+import { getTextWithoutComments } from '../util/doc'
 
 export function getInvalidVariantDiagnostics(
   state: State,
@@ -38,7 +39,7 @@ export function getInvalidVariantDiagnostics(
   }
 
   ranges.forEach((range) => {
-    let text = document.getText(range)
+    let text = getTextWithoutComments(document, 'css', range)
     let matches = findAll(/(?:\s|^)@variants\s+(?<variants>[^{]+)/g, text)
 
     matches.forEach((match) => {
diff --git a/packages/tailwindcss-language-service/src/hoverProvider.ts b/packages/tailwindcss-language-service/src/hoverProvider.ts
index 836d687..5ea1fcb 100644
--- a/packages/tailwindcss-language-service/src/hoverProvider.ts
+++ b/packages/tailwindcss-language-service/src/hoverProvider.ts
@@ -8,6 +8,7 @@ import { validateApply } from './util/validateApply'
 import { getClassNameParts } from './util/getClassNameAtPosition'
 import * as jit from './util/jit'
 import { validateConfigPath } from './diagnostics/getInvalidConfigPathDiagnostics'
+import { getTextWithoutComments } from './util/doc'
 
 export async function doHover(
   state: State,
@@ -23,10 +24,7 @@ export async function doHover(
 function provideCssHelperHover(state: State, document: TextDocument, position: Position): Hover {
   if (!isCssContext(state, document, position)) return null
 
-  const line = document.getText({
-    start: { line: position.line, character: 0 },
-    end: { line: position.line + 1, character: 0 },
-  })
+  const line = getTextWithoutComments(document, 'css').split('\n')[position.line]
 
   const match = line.match(/(?<helper>theme|config)\((?<quote>['"])(?<key>[^)]+)\k<quote>[^)]*\)/)
 
diff --git a/packages/tailwindcss-language-service/src/util/doc.ts b/packages/tailwindcss-language-service/src/util/doc.ts
new file mode 100644
index 0000000..810f79d
--- /dev/null
+++ b/packages/tailwindcss-language-service/src/util/doc.ts
@@ -0,0 +1,29 @@
+import type { TextDocument, Range } from 'vscode-languageserver'
+
+export function getTextWithoutComments(
+  doc: TextDocument,
+  type: 'html' | 'js' | 'jsx' | 'css',
+  range?: Range
+): string
+export function getTextWithoutComments(text: string, type: 'html' | 'js' | 'jsx' | 'css'): string
+export function getTextWithoutComments(
+  docOrText: TextDocument | string,
+  type: 'html' | 'js' | 'jsx' | 'css',
+  range?: Range
+): string {
+  let text = typeof docOrText === 'string' ? docOrText : docOrText.getText(range)
+
+  if (type === 'js' || type === 'jsx') {
+    return text.replace(/\/\*.*?\*\//gs, replace).replace(/\/\/.*?$/gms, replace)
+  }
+
+  if (type === 'css') {
+    return text.replace(/\/\*.*?\*\//gs, replace)
+  }
+
+  return text.replace(/<!--.*?-->/gs, replace)
+}
+
+function replace(match: string): string {
+  return match.replace(/./gs, (char) => (char === '\n' ? '\n' : ' '))
+}
diff --git a/packages/tailwindcss-language-service/src/util/find.ts b/packages/tailwindcss-language-service/src/util/find.ts
index d30ac49..5b70d7a 100644
--- a/packages/tailwindcss-language-service/src/util/find.ts
+++ b/packages/tailwindcss-language-service/src/util/find.ts
@@ -12,6 +12,7 @@ import { resolveRange } from './resolveRange'
 import dlv from 'dlv'
 import { rangesEqual } from './rangesEqual'
 import Regex from 'becke-ch--regex--s0-0-v1--base--pl--lib'
+import { getTextWithoutComments } from './doc'
 
 export function findAll(re: RegExp, str: string): RegExpMatchArray[] {
   let match: RegExpMatchArray
@@ -74,7 +75,7 @@ export async function findClassNamesInRange(
   state: State,
   doc: TextDocument,
   range?: Range,
-  mode?: 'html' | 'css',
+  mode?: 'html' | 'css' | 'jsx',
   includeCustom: boolean = true
 ): Promise<DocumentClassName[]> {
   const classLists = await findClassListsInRange(state, doc, range, mode, includeCustom)
@@ -90,7 +91,7 @@ export async function findClassNamesInDocument(
 }
 
 export function findClassListsInCssRange(doc: TextDocument, range?: Range): DocumentClassList[] {
-  const text = doc.getText(range)
+  const text = getTextWithoutComments(doc, 'css', range)
   const matches = findAll(
     /(@apply\s+)(?<classList>[^;}]+?)(?<important>\s*!important)?\s*[;}]/g,
     text
@@ -184,9 +185,10 @@ export function matchClassAttributes(text: string, attributes: string[]): RegExp
 export async function findClassListsInHtmlRange(
   state: State,
   doc: TextDocument,
+  type: 'html' | 'js' | 'jsx',
   range?: Range
 ): Promise<DocumentClassList[]> {
-  const text = doc.getText(range)
+  const text = getTextWithoutComments(doc, type, range)
 
   const matches = matchClassAttributes(
     text,
@@ -291,14 +293,14 @@ export async function findClassListsInRange(
   state: State,
   doc: TextDocument,
   range?: Range,
-  mode?: 'html' | 'css',
+  mode?: 'html' | 'css' | 'jsx',
   includeCustom: boolean = true
 ): Promise<DocumentClassList[]> {
   let classLists: DocumentClassList[]
   if (mode === 'css') {
     classLists = findClassListsInCssRange(doc, range)
   } else {
-    classLists = await findClassListsInHtmlRange(state, doc, range)
+    classLists = await findClassListsInHtmlRange(state, doc, mode, range)
   }
   return dedupeClassLists([
     ...classLists,
@@ -322,7 +324,9 @@ export async function findClassListsInDocument(
       ...(await Promise.all(
         boundaries
           .filter((b) => b.type === 'html' || b.type === 'jsx')
-          .map(({ range }) => findClassListsInHtmlRange(state, doc, range))
+          .map(({ type, range }) =>
+            findClassListsInHtmlRange(state, doc, type === 'html' ? 'html' : 'jsx', range)
+          )
       )),
       ...boundaries
         .filter((b) => b.type === 'css')
@@ -354,7 +358,7 @@ export function findHelperFunctionsInRange(
   doc: TextDocument,
   range?: Range
 ): DocumentHelperFunction[] {
-  const text = doc.getText(range)
+  const text = getTextWithoutComments(doc, 'css', range)
   const matches = findAll(
     /(?<before>^|\s)(?<helper>theme|config)\((?:(?<single>')([^']+)'|(?<double>")([^"]+)")[^)]*\)/gm,
     text
@@ -408,8 +412,10 @@ export async function findClassNameAtPosition(
 
   if (isCssContext(state, doc, position)) {
     classNames = await findClassNamesInRange(state, doc, searchRange, 'css')
-  } else if (isHtmlContext(state, doc, position) || isJsxContext(state, doc, position)) {
+  } else if (isHtmlContext(state, doc, position)) {
     classNames = await findClassNamesInRange(state, doc, searchRange, 'html')
+  } else if (isJsxContext(state, doc, position)) {
+    classNames = await findClassNamesInRange(state, doc, searchRange, 'jsx')
   }
 
   if (classNames.length === 0) {
diff --git a/packages/tailwindcss-language-service/src/util/getLanguageBoundaries.ts b/packages/tailwindcss-language-service/src/util/getLanguageBoundaries.ts
index 1f91fa1..3e972e9 100644
--- a/packages/tailwindcss-language-service/src/util/getLanguageBoundaries.ts
+++ b/packages/tailwindcss-language-service/src/util/getLanguageBoundaries.ts
@@ -5,6 +5,7 @@ import { indexToPosition } from './find'
 import { isJsDoc } from './js'
 import moo from 'moo'
 import Cache from 'tmp-cache'
+import { getTextWithoutComments } from './doc'
 
 export type LanguageBoundary = { type: 'html' | 'js' | 'css' | string; range: Range }
 
@@ -113,10 +114,14 @@ export function getLanguageBoundaries(
     return cachedBoundaries
   }
 
+  let isJs = isJsDoc(state, doc)
+
   let defaultType = isVueDoc(doc)
     ? 'none'
-    : isHtmlDoc(state, doc) || isJsDoc(state, doc) || isSvelteDoc(doc)
+    : isHtmlDoc(state, doc) || isSvelteDoc(doc)
     ? 'html'
+    : isJs
+    ? 'jsx'
     : null
 
   if (defaultType === null) {
@@ -124,6 +129,8 @@ export function getLanguageBoundaries(
     return null
   }
 
+  text = getTextWithoutComments(text, isJs ? 'js' : 'html')
+
   let lexer = defaultType === 'none' ? vueLexer : defaultLexer
   lexer.reset(text)