【202308】京東前端一面 · 大廠前端面試真題

[1、瀏覽器渲染](1%E3%80%81%E6%B5%8F%E8%A7%88%E5%99%A8%E6%B8%B2%E6%9F%93.md) [2、Url 輸入到向服務器請求是什么過程，服務器怎么處理的？](2%E3%80%81Url%E8%BE%93%E5%85%A5%E5%88%B0%E5%90%91%E6%9C%8D%E5%8A%A1%E5%99%A8%E8%AF%B7%E6%B1%82%E6%98%AF%E4%BB%80%E4%B9%88%E8%BF%87%E7%A8%8B%EF%BC%8C%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86%E7%9A%84%EF%BC%9F.md) [3、性能優化](3%E3%80%81%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%961.md) [4、Webpack如何做到性能優化？](4%E3%80%81Webpack%E5%A6%82%E4%BD%95%E5%81%9A%E5%88%B0%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%EF%BC%9F.md) [5、git常用的指令](5%E3%80%81git%E5%B8%B8%E7%94%A8%E7%9A%84%E6%8C%87%E4%BB%A4.md) [6、VsCode里用了什么插件，是做什么的？](6%E3%80%81VsCode%E9%87%8C%E7%94%A8%E4%BA%86%E4%BB%80%E4%B9%88%E6%8F%92%E4%BB%B6%EF%BC%8C%E6%98%AF%E5%81%9A%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F.md) [7、JavaScript里有幾種變量，包括哪些，在瀏覽器內存中分別是怎么存儲的？](7%E3%80%81JavaScript%E9%87%8C%E6%9C%89%E5%87%A0%E7%A7%8D%E5%8F%98%E9%87%8F%EF%BC%8C%E5%8C%85%E6%8B%AC%E5%93%AA%E4%BA%9B%EF%BC%8C%E5%9C%A8%E6%B5%8F%E8%A7%88%E5%99%A8%E5%86%85%E5%AD%98%E4%B8%AD%E5%88%86%E5%88%AB%E6%98%AF%E6%80%8E%E4%B9%88%E5%AD%98%E5%82%A8%E7%9A%84%EF%BC%9F.md) [8、ES6了解哪些？](8%E3%80%81ES6%E4%BA%86%E8%A7%A3%E5%93%AA%E4%BA%9B%EF%BC%9F.md) [9、介紹一下箭頭函數](9%E3%80%81%E4%BB%8B%E7%BB%8D%E4%B8%80%E4%B8%8B%E7%AE%AD%E5%A4%B4%E5%87%BD%E6%95%B0.md) [10、在瀏覽器能直接執行箭頭函數嗎，是否需要編譯，編譯之后是什么樣的？](10%E3%80%81%E5%9C%A8%E6%B5%8F%E8%A7%88%E5%99%A8%E8%83%BD%E7%9B%B4%E6%8E%A5%E6%89%A7%E8%A1%8C%E7%AE%AD%E5%A4%B4%E5%87%BD%E6%95%B0%E5%90%97%EF%BC%8C%E6%98%AF%E5%90%A6%E9%9C%80%E8%A6%81%E7%BC%96%E8%AF%91%EF%BC%8C%E7%BC%96%E8%AF%91%E4%B9%8B%E5%90%8E%E6%98%AF%E4%BB%80%E4%B9%88%E6%A0%B7%E7%9A%84%EF%BC%9F.md) [11、介紹一下this，箭頭函數里用this指向的是哪個對象，定義時的還是執行時的](11%E3%80%81%E4%BB%8B%E7%BB%8D%E4%B8%80%E4%B8%8Bthis%EF%BC%8C%E7%AE%AD%E5%A4%B4%E5%87%BD%E6%95%B0%E9%87%8C%E7%94%A8this%E6%8C%87%E5%90%91%E7%9A%84%E6%98%AF%E5%93%AA%E4%B8%AA%E5%AF%B9%E8%B1%A1%EF%BC%8C%E5%AE%9A%E4%B9%89%E6%97%B6%E7%9A%84%E8%BF%98%E6%98%AF%E6%89%A7%E8%A1%8C%E6%97%B6%E7%9A%84.md) [12、執行上下文是什么？](12%E3%80%81%E6%89%A7%E8%A1%8C%E4%B8%8A%E4%B8%8B%E6%96%87%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F.md) [13、閉包原理，解決什么問題？](13%E3%80%81%E9%97%AD%E5%8C%85%E5%8E%9F%E7%90%86%EF%BC%8C%E8%A7%A3%E5%86%B3%E4%BB%80%E4%B9%88%E9%97%AE%E9%A2%98%EF%BC%9F.md) [14、JavaScript變量的作用域，let，const，var的區別](14%E3%80%81JavaScript%E5%8F%98%E9%87%8F%E7%9A%84%E4%BD%9C%E7%94%A8%E5%9F%9F%EF%BC%8Clet%EF%BC%8Cconst%EF%BC%8Cvar%E7%9A%84%E5%8C%BA%E5%88%AB.md) [15、為什么var定義的變量可以重復定義，var一定是全局嗎？](15%E3%80%81%E4%B8%BA%E4%BB%80%E4%B9%88var%E5%AE%9A%E4%B9%89%E7%9A%84%E5%8F%98%E9%87%8F%E5%8F%AF%E4%BB%A5%E9%87%8D%E5%A4%8D%E5%AE%9A%E4%B9%89%EF%BC%8Cvar%E4%B8%80%E5%AE%9A%E6%98%AF%E5%85%A8%E5%B1%80%E5%90%97%EF%BC%9F.md) [16、npm包管理工具能做什么，如何發布，怎么管理包的版本？](16%E3%80%81npm%E5%8C%85%E7%AE%A1%E7%90%86%E5%B7%A5%E5%85%B7%E8%83%BD%E5%81%9A%E4%BB%80%E4%B9%88%EF%BC%8C%E5%A6%82%E4%BD%95%E5%8F%91%E5%B8%83%EF%BC%8C%E6%80%8E%E4%B9%88%E7%AE%A1%E7%90%86%E5%8C%85%E7%9A%84%E7%89%88%E6%9C%AC%EF%BC%9F.md)