Support passing config path via object

__tests__/customConfig.test.js

@@ -68,6 +68,33 @@ test('custom config can be passed as an object', () => {
     })
 })
 
+test('custom config path can be passed using `config` property in an object', () => {
+  return postcss([tailwind({ config: path.resolve(`${__dirname}/fixtures/custom-config.js`) })])
+    .process(
+      `
+        @responsive {
+          .foo {
+            color: blue;
+          }
+        }
+      `,
+      { from: undefined }
+    )
+    .then(result => {
+      const expected = `
+        .foo {
+          color: blue;
+        }
+        @media (min-width: 400px) {
+          .mobile\\:foo {
+            color: blue;
+          }
+        }
+      `
+      expect(result.css).toMatchCss(expected)
+    })
+})
+
 test('tailwind.config.js is picked up by default', () => {
   return inTempDirectory(() => {
     fs.writeFileSync(

src/index.js

@@ -13,10 +13,14 @@ import { defaultConfigFile } from './constants'
 import defaultConfig from '../stubs/defaultConfig.stub.js'
 
 function resolveConfigPath(filePath) {
-  if (_.isObject(filePath)) {
+  if (_.isObject(filePath) && !_.has(filePath, 'config')) {
     return undefined
   }
 
+  if (_.isObject(filePath) && _.has(filePath, 'config')) {
+    return path.resolve(filePath.config)
+  }
+
   if (!_.isUndefined(filePath)) {
     return path.resolve(filePath)
   }