diff --git a/README.md b/README.md
index 0669008..fe65282 100644
--- a/README.md
+++ b/README.md
@@ -8,14 +8,14 @@
 
 1. [HTML（包括HTML5，共有79道）](https://github.com/pwstrick/daily/blob/master/interview/html.md)
 2. [CSS（包括CSS3，共有100道）](https://github.com/pwstrick/daily/blob/master/interview/css.md)
-3. [JavaScript（131道）](https://github.com/pwstrick/daily/blob/master/interview/javascript.md)
+3. [JavaScript（136道）](https://github.com/pwstrick/daily/blob/master/interview/javascript.md)
 4. [ES6（88道）](https://github.com/pwstrick/daily/blob/master/interview/es6.md)
 5. [React（93道）](https://github.com/pwstrick/daily/blob/master/interview/react.md)
 6. [网络（57道）](https://github.com/pwstrick/daily/blob/master/interview/network.md)
 7. [工具（包括webpack、Git等，共54道）](https://github.com/pwstrick/daily/blob/master/interview/tool.md)
-8. [算法（93道）](https://github.com/pwstrick/daily/blob/master/interview/algorithm.md)
+8. [算法（94道）](https://github.com/pwstrick/daily/blob/master/interview/algorithm.md)
 9. [安全（7道）](https://github.com/pwstrick/daily/blob/master/interview/security.md)
-10. [性能（10道）](https://github.com/pwstrick/daily/blob/master/interview/performance.md)
+10. [性能（12道）](https://github.com/pwstrick/daily/blob/master/interview/performance.md)
 11. [软技能（107道）](https://github.com/pwstrick/daily/blob/master/interview/skill.md)
 12. [前端（18道）](https://github.com/pwstrick/daily/blob/master/interview/fe.md)
 13. [Node.js（12道）](https://github.com/pwstrick/daily/blob/master/interview/nodejs.md)
@@ -47,8 +47,8 @@
 
 我还建立了一个微信前端交流群，如要进群，可在加好友后和我说一下。
 
+## 前端技术栈
+下图引用自[roadmap.sh](https://roadmap.sh/frontend)。
 
-
-
-
+<img src="https://github.com/pwstrick/daily/raw/master/assets/img/qrcode.jpg" width="100%" />
 
diff --git a/assets/img/fe-transparent.png b/assets/img/fe-transparent.png
new file mode 100644
index 0000000..a7252a7
Binary files /dev/null and b/assets/img/fe-transparent.png differ
diff --git a/interview/algorithm.md b/interview/algorithm.md
index 42df15c..87f0ce4 100644
--- a/interview/algorithm.md
+++ b/interview/algorithm.md
@@ -91,4 +91,4 @@
 91. [请实现几个你所知的排序算法。](https://github.com/pwstrick/daily/issues/787)
 92. [简要介绍一下RSA。](https://github.com/pwstrick/daily/issues/832)
 93. [介绍一下KMP算法？](https://github.com/pwstrick/daily/issues/835)
-
+94. [如何实现深度优先搜索和广度优先搜索？](https://github.com/pwstrick/daily/issues/853)
diff --git a/interview/javascript.md b/interview/javascript.md
index c27246c..fef4fc2 100644
--- a/interview/javascript.md
+++ b/interview/javascript.md
@@ -344,6 +344,11 @@ machine('ygy').waitFirst(5).do('eat').execute();
 129. [什么是节流和抖动？](https://github.com/pwstrick/daily/issues/827)
 130. [深拷贝和浅拷贝有什么区别？](https://github.com/pwstrick/daily/issues/828)
 131. [如何实现对一个DOM元素的深拷贝，包括元素的绑定事件？](https://github.com/pwstrick/daily/issues/833)
+132. [用代码模拟出apply()、call()和bind()三个函数。](https://github.com/pwstrick/daily/issues/854)
+133. [用代码模拟instanceof运算符。](https://github.com/pwstrick/daily/issues/855)
+134. [实现一个简单的路由。](https://github.com/pwstrick/daily/issues/856)
+135. [封装鼠标拖拽的功能。](https://github.com/pwstrick/daily/issues/857)
+136. [如何让两个非常大的数字相加？](https://github.com/pwstrick/daily/issues/859)
 
 
 ## 思维导图
diff --git a/interview/performance.md b/interview/performance.md
index 69881e2..c7bd536 100644
--- a/interview/performance.md
+++ b/interview/performance.md
@@ -7,4 +7,6 @@
 7. [怎么优化页面的加载速度？如果有很多个小图标，怎么优化？iconfont有什么缺点？](https://github.com/pwstrick/daily/issues/807)
 8. [将静态资源放在其他域名的目的是什么？](https://github.com/pwstrick/daily/issues/830)
 9. [Canvas性能优化的方法有哪些？](https://github.com/pwstrick/daily/issues/834)
-10. [重绘和回流（重排）是什么，如何避免？](https://github.com/pwstrick/daily/issues/842)
\ No newline at end of file
+10. [重绘和回流（重排）是什么，如何避免？](https://github.com/pwstrick/daily/issues/842)
+11. [如何优化网页的动画？](https://github.com/pwstrick/daily/issues/858)
+12. [大量数据滚动加载如何保证性能。](https://github.com/pwstrick/daily/issues/860)
\ No newline at end of file