Ali side of the phone face

1. Flex understanding, flex-direction represents what the meaning of row, center how to set
2. Grad layout
3. Rem, how to set the size of the elements in different browsers
4. The difference between Cookie, local Storage, sessionStorage, which can communicate with the server
5. Localstorage set of elements api
6. How to set the cookie is not operating js
7. Cookie settings how valid
8. Security Localstorage do landing state held
9. Debugging node. Js, how debugging interface has a problem
10. Box model
11. The difference between Position, absolute and relative of
12. Vue routing implementation principle
13. https
14. Heap and stack

https://blog.csdn.net/ZHUO_SIR/article/details/80998631

(1) program memory layout of the scene, two kinds of stack and the stack represents memory management;

            Stack memory mainly for storing various basic types of variables, including Boolean, Number, String, Undefined, Null, ** and object pointer variable; heap memory and is mainly responsible for this variable type Object target image storing
data (2) under scenario structure, represented by two common stack and the stack data structure.

   Stack: last out

   Heap: a special kind of a complete binary tree, the root node is the maximum or minimum, the maximum time to time large top stack, the stack top is a small minimum