diff --git a/lib/theme.js b/lib/theme.js
index 360dd7e2..4575bc9c 100644
--- a/lib/theme.js
+++ b/lib/theme.js
@@ -42,7 +42,7 @@ export const initTheme = (theme, changeTheme) => {
  * 是否优先深色模式， 根据系统深色模式以及当前时间判断
  * @returns {*}
  */
-export function isPreferDark () {
+export function isPreferDark() {
   if (BLOG.APPEARANCE === 'dark') {
     return true
   }
diff --git a/lib/utils.js b/lib/utils.js
index a53b2f2d..be47e17f 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -6,7 +6,7 @@
  * @param type js 或 css
  * @returns {Promise<unknown>}
  */
-export function loadExternalResource (url, type) {
+export function loadExternalResource(url, type) {
   return new Promise((resolve, reject) => {
     let tag
 
@@ -31,8 +31,8 @@ export function loadExternalResource (url, type) {
  * @param {}} variable
  * @returns
  */
-export function getQueryVariable (variable) {
-  const query = window.location.search.substring(1)
+export function getQueryVariable(variable) {
+  const query = typeof window !== 'undefined' ? window.location.search.substring(1) : ''
   const vars = query.split('&')
   for (let i = 0; i < vars.length; i++) {
     const pair = vars[i].split('=')
@@ -46,7 +46,7 @@ export function getQueryVariable (variable) {
  * @param target
  * @param sources
  */
-export function mergeDeep (target, ...sources) {
+export function mergeDeep(target, ...sources) {
   if (!sources.length) return target
   const source = sources.shift()
 
@@ -68,6 +68,6 @@ export function mergeDeep (target, ...sources) {
  * @param item
  * @returns {boolean}
  */
-export function isObject (item) {
+export function isObject(item) {
   return (item && typeof item === 'object' && !Array.isArray(item))
 }