[JIT] Add support for "raw" purge content (#4272)

* add support for "raw" purge content

* add support for raw content extensions

Author: bradlc

src/jit/lib/expandTailwindAtRules.js

@@ -25,9 +25,12 @@ function getDefaultExtractor(fileExtension) {
   }
 }
 
-function getExtractor(fileName, tailwindConfig) {
+function getExtractor(tailwindConfig, fileExtension) {
   const purgeOptions = tailwindConfig && tailwindConfig.purge && tailwindConfig.purge.options
-  const fileExtension = path.extname(fileName).slice(1)
+
+  if (!fileExtension) {
+    return (purgeOptions && purgeOptions.defaultExtractor) || getDefaultExtractor()
+  }
 
   if (!purgeOptions) {
     return getDefaultExtractor(fileExtension)
@@ -208,11 +211,16 @@ export default function expandTailwindAtRules(context, registerDependency) {
     env.DEBUG && console.time('Reading changed files')
     for (let file of context.changedFiles) {
       let content = fs.readFileSync(file, 'utf8')
-      let extractor = getExtractor(file, context.tailwindConfig)
+      let extractor = getExtractor(context.tailwindConfig, path.extname(file).slice(1))
       getClassCandidates(content, extractor, contentMatchCache, candidates, seen)
     }
     env.DEBUG && console.timeEnd('Reading changed files')
 
+    for (let { content, extension } of context.rawContent) {
+      let extractor = getExtractor(context.tailwindConfig, extension)
+      getClassCandidates(content, extractor, contentMatchCache, candidates, seen)
+    }
+
     // ---
 
     // Generate the actual CSS

src/jit/lib/setupContext.js

@@ -767,6 +767,10 @@ export default function setupContext(configOrPath) {
 
     process.env.DEBUG && console.log('Setting up new context...')
 
+    let purgeContent = Array.isArray(tailwindConfig.purge)
+      ? tailwindConfig.purge
+      : tailwindConfig.purge.content
+
     let context = {
       changedFiles: new Set(),
       ruleCache: new Set(),
@@ -781,10 +785,12 @@ export default function setupContext(configOrPath) {
       configPath: userConfigPath,
       tailwindConfig: tailwindConfig,
       configDependencies: new Set(),
-      candidateFiles: (Array.isArray(tailwindConfig.purge)
-        ? tailwindConfig.purge
-        : tailwindConfig.purge.content
-      ).map((path) => normalizePath(path)),
+      candidateFiles: purgeContent
+        .filter((item) => typeof item === 'string')
+        .map((path) => normalizePath(path)),
+      rawContent: purgeContent
+        .filter((item) => typeof item.raw === 'string')
+        .map(({ raw, extension }) => ({ content: raw, extension })),
       variantMap: new Map(),
       stylesheetCache: null,
       fileModifiedMap: new Map(),