2018-03-13 23:12:27 +08:00
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2018-03-21 21:45:10 +08:00
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2018-03-13 23:12:27 +08:00
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## JavaScript
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2018-03-21 21:45:10 +08:00
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### 存储相关：请描述以下cookie、localStorage、sessionStorage的区别
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2018-03-13 23:12:27 +08:00
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2018-03-21 21:45:10 +08:00
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> 在H5之前，cookie一直都是本地存储的一个重要的方法。直到后面的两个出现了， 就开始用后面的两个做本地存储。
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2018-03-13 23:12:27 +08:00
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**1、cookie**：
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- 本身用于客户端和服务器端的通信。
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- 但是它有本地存储的功能，于是就被“借用”。
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我们可以通过`document.cookie`获取和修改cookie，获取到的其实就是一个字符串。
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cookie用于存储时的缺点：
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- 存储量太小，只有4kb
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- 所有http请求都带着，会影响获取资源的效率
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- api简单，需要封装才能用。`document.cookie = ...`
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2018-03-21 21:45:10 +08:00
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## HTML5
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### HTML5新增了哪些内容或API？使用过哪些？
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新元素：
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- `<section>`、`<footer>` 和 `<header>`等
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新的api：
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- 网络存储: sessionStorage 和 localStorage
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参考链接：
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2018-03-13 23:12:27 +08:00
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2018-03-21 21:45:10 +08:00
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- [笔记：阿里、网易、滴滴共十次前端面试碰到的问题](https://zhoukekestar.github.io/notes/2017/06/07/interview-answers.html)
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2018-03-13 23:12:27 +08:00
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2018-03-21 21:45:10 +08:00
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## CSS
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### 如何让一个div元素隐藏？你能想到的方式有几种？
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-
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2018-03-13 23:12:27 +08:00
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## ES6
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### for each、for in、for of的区别
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- `foreach`用于遍历数组，是数组的一个方法。不支持 return。
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2018-03-14 22:49:34 +08:00
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- `for ... in`获取的对象是index索引值。
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2018-03-13 23:12:27 +08:00
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2018-03-14 22:49:34 +08:00
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- `for ... of`获取的是对象里的值。
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2018-03-13 23:12:27 +08:00
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2018-03-21 21:45:10 +08:00
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## 网络相关
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### 浏览器输入url到显示内容，有哪些过程
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（1）浏览器解析url。包括：协议、域名、端口号、资源路径、参数查询
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（2）DNS解析
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（3）TCP握手
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（4）HTTP请求
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（5）服务器处理请求
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（6）浏览器渲染：DOM tree、CSS rule tree、render tree。
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（7）display
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参考链接：
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- [笔记：阿里、网易、滴滴共十次前端面试碰到的问题](https://zhoukekestar.github.io/notes/2017/06/07/interview-answers.html)
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- [what-happens-when-zh_CN](https://github.com/skyline75489/what-happens-when-zh_CN#dns)
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- [码农翻身 | 小白科普：从输入网址到最后浏览器呈现页面内容，中间发生了什么？](https://mp.weixin.qq.com/s/3_DZKSP492uq9RfQ3eW4_A)
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- 从输入URL到页面加载发生了什么：<https://segmentfault.com/a/1190000006879700>
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2018-03-13 23:12:27 +08:00
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## GitHub
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- [荐]面试题和答案：<https://github.com/markyun/My-blog/tree/master/Front-end-Developer-Questions/Questions-and-Answers>
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- 面试题和答案：<https://github.com/qiu-deqing/FE-interview>
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有个题是，浏览器输入url，有哪些过程
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- [讲到了Cookie和session](https://github.com/WarpPrism/Blog/issues/5)
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- 这个也很全：<https://github.com/gnipbao/Front-end-Interview-questions>
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- <https://github.com/giscafer/front-end-manual/issues/3>
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## 按时间排列
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### 2018-03-11
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- web前端面试题汇总：<https://www.jianshu.com/p/2f7eb1ad7174>
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- 2017前端面试题及答案总结：<https://yeaseonzhang.github.io/2017/09/17/2017%E5%89%8D%E7%AB%AF%E9%9D%A2%E8%AF%95%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88%E6%80%BB%E7%BB%93/>
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### 2018-03-12-今日头条面试题
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- [ 今日头条一面笔试面试题！！！！！完整](http://blog.csdn.net/github_35924246/article/details/75675901)
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