fix: fix empty object error (#4903)

Co-authored-by: zhongcheng <zhongcheng@bytedance.com>

src/plugins/animation.js

@@ -4,7 +4,7 @@ export default function () {
   return function ({ matchUtilities, theme, variants, prefix }) {
     let prefixName = (name) => prefix(`.${name}`).slice(1)
     let keyframes = Object.fromEntries(
-      Object.entries(theme('keyframes')).map(([key, value]) => {
+      Object.entries(theme('keyframes') || {}).map(([key, value]) => {
         return [
           key,
           [

src/util/createUtilityPlugin.js

@@ -36,7 +36,7 @@ export default function createUtilityPlugin(
         {
           values: filterDefault
             ? Object.fromEntries(
-                Object.entries(theme(themeKey)).filter(([modifier]) => modifier !== 'DEFAULT')
+                Object.entries(theme(themeKey) || {}).filter(([modifier]) => modifier !== 'DEFAULT')
               )
             : theme(themeKey),
           variants: variants(themeKey),

src/util/flattenColorPalette.js

@@ -1,7 +1,7 @@
 const flattenColorPalette = (colors) =>
   Object.assign(
     {},
-    ...Object.entries(colors).flatMap(([color, values]) =>
+    ...Object.entries(colors || {}).flatMap(([color, values]) =>
       typeof values == 'object'
         ? Object.entries(flattenColorPalette(values)).map(([number, hex]) => ({
             [color + (number === 'DEFAULT' ? '' : `-${number}`)]: hex,

src/util/processPlugins.js

@@ -106,7 +106,7 @@ export default function (plugins, config) {
       prefix: applyConfiguredPrefix,
       addUtilities,
       matchUtilities: (matches, { values, variants, respectPrefix, respectImportant }) => {
-        let modifierValues = Object.entries(values)
+        let modifierValues = Object.entries(values || {})
 
         let result = Object.entries(matches).flatMap(([name, utilityFunction]) => {
           return modifierValues