【202309】騰訊前端一面 · 大廠前端面試真題

[1、瀏覽器事件執行機制，瀏覽器是怎么實現這個機制的？](1%E3%80%81%E6%B5%8F%E8%A7%88%E5%99%A8%E4%BA%8B%E4%BB%B6%E6%89%A7%E8%A1%8C%E6%9C%BA%E5%88%B6%EF%BC%8C%E6%B5%8F%E8%A7%88%E5%99%A8%E6%98%AF%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E8%BF%99%E4%B8%AA%E6%9C%BA%E5%88%B6%E7%9A%84%EF%BC%9F.md) [2、基本數據類型有哪些，復雜數據類型有哪些？](2%E3%80%81%E5%9F%BA%E6%9C%AC%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%8C%E5%A4%8D%E6%9D%82%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%9F.md) [3、js繼承怎么實現的，除了原型鏈繼承還有哪些，原型鏈和類繼承的區別是什么？](3%E3%80%81js%E7%BB%A7%E6%89%BF%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E7%9A%84%EF%BC%8C%E9%99%A4%E4%BA%86%E5%8E%9F%E5%9E%8B%E9%93%BE%E7%BB%A7%E6%89%BF%E8%BF%98%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%8C%E5%8E%9F%E5%9E%8B%E9%93%BE%E5%92%8C%E7%B1%BB%E7%BB%A7%E6%89%BF%E7%9A%84%E5%8C%BA%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F.md) [4、線程和進程的區別是什么，為什么游覽器使用單線程？](4%E3%80%81%E7%BA%BF%E7%A8%8B%E5%92%8C%E8%BF%9B%E7%A8%8B%E7%9A%84%E5%8C%BA%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%8C%E4%B8%BA%E4%BB%80%E4%B9%88%E6%B8%B8%E8%A7%88%E5%99%A8%E4%BD%BF%E7%94%A8%E5%8D%95%E7%BA%BF%E7%A8%8B%EF%BC%9F.md) [5、請求攔截器和響應攔截器是一種什么樣的設計模式？](5%E3%80%81%E8%AF%B7%E6%B1%82%E6%8B%A6%E6%88%AA%E5%99%A8%E5%92%8C%E5%93%8D%E5%BA%94%E6%8B%A6%E6%88%AA%E5%99%A8%E6%98%AF%E4%B8%80%E7%A7%8D%E4%BB%80%E4%B9%88%E6%A0%B7%E7%9A%84%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F%EF%BC%9F.md) [6、你知道axios底層是怎么實現的嗎？](6%E3%80%81%E4%BD%A0%E7%9F%A5%E9%81%93axios%E5%BA%95%E5%B1%82%E6%98%AF%E6%80%8E%E4%B9%88%E5%AE%9E%E7%8E%B0%E7%9A%84%E5%90%97%EF%BC%9F.md) [7、發出請求到收到回包整個瀏覽器執行了什么或者是網絡層執行了什么？](7%E3%80%81%E5%8F%91%E5%87%BA%E8%AF%B7%E6%B1%82%E5%88%B0%E6%94%B6%E5%88%B0%E5%9B%9E%E5%8C%85%E6%95%B4%E4%B8%AA%E6%B5%8F%E8%A7%88%E5%99%A8%E6%89%A7%E8%A1%8C%E4%BA%86%E4%BB%80%E4%B9%88%E6%88%96%E8%80%85%E6%98%AF%E7%BD%91%E7%BB%9C%E5%B1%82%E6%89%A7%E8%A1%8C%E4%BA%86%E4%BB%80%E4%B9%88%EF%BC%9F.md) [8、用戶輸入網址期間發生了什么，在這個過程中瀏覽器有多少線程或者進程在做這件事？](8%E3%80%81%E7%94%A8%E6%88%B7%E8%BE%93%E5%85%A5%E7%BD%91%E5%9D%80%E6%9C%9F%E9%97%B4%E5%8F%91%E7%94%9F%E4%BA%86%E4%BB%80%E4%B9%88%EF%BC%8C%E5%9C%A8%E8%BF%99%E4%B8%AA%E8%BF%87%E7%A8%8B%E4%B8%AD%E6%B5%8F%E8%A7%88%E5%99%A8%E6%9C%89%E5%A4%9A%E5%B0%91%E7%BA%BF%E7%A8%8B%E6%88%96%E8%80%85%E8%BF%9B%E7%A8%8B%E5%9C%A8%E5%81%9A%E8%BF%99%E4%BB%B6%E4%BA%8B%EF%BC%9F.md) [9、DNS主要是做什么的，怎么做到的？](9%E3%80%81DNS%E4%B8%BB%E8%A6%81%E6%98%AF%E5%81%9A%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%8C%E6%80%8E%E4%B9%88%E5%81%9A%E5%88%B0%E7%9A%84%EF%BC%9F.md) [10、為什么建立連接是三次握手，而斷開是四次揮手？](10%E3%80%81%E4%B8%BA%E4%BB%80%E4%B9%88%E5%BB%BA%E7%AB%8B%E8%BF%9E%E6%8E%A5%E6%98%AF%E4%B8%89%E6%AC%A1%E6%8F%A1%E6%89%8B%EF%BC%8C%E8%80%8C%E6%96%AD%E5%BC%80%E6%98%AF%E5%9B%9B%E6%AC%A1%E6%8C%A5%E6%89%8B%EF%BC%9F.md) [11、從拿到html，css等文件到渲染成頁面你認為最耗時的是哪一步？](11%E3%80%81%E4%BB%8E%E6%8B%BF%E5%88%B0html%EF%BC%8Ccss%E7%AD%89%E6%96%87%E4%BB%B6%E5%88%B0%E6%B8%B2%E6%9F%93%E6%88%90%E9%A1%B5%E9%9D%A2%E4%BD%A0%E8%AE%A4%E4%B8%BA%E6%9C%80%E8%80%97%E6%97%B6%E7%9A%84%E6%98%AF%E5%93%AA%E4%B8%80%E6%AD%A5%EF%BC%9F.md) [12、vue是怎么解決更新dom性能開銷大的問題的，diff具體是怎么做的？](12%E3%80%81vue%E6%98%AF%E6%80%8E%E4%B9%88%E8%A7%A3%E5%86%B3%E6%9B%B4%E6%96%B0dom%E6%80%A7%E8%83%BD%E5%BC%80%E9%94%80%E5%A4%A7%E7%9A%84%E9%97%AE%E9%A2%98%E7%9A%84%EF%BC%8Cdiff%E5%85%B7%E4%BD%93%E6%98%AF%E6%80%8E%E4%B9%88%E5%81%9A%E7%9A%84%EF%BC%9F.md) [13、異步請求處理如promise，await這些的主要區別和用法你知道嗎？](13%E3%80%81%E5%BC%82%E6%AD%A5%E8%AF%B7%E6%B1%82%E5%A4%84%E7%90%86%E5%A6%82promise%EF%BC%8Cawait%E8%BF%99%E4%BA%9B%E7%9A%84%E4%B8%BB%E8%A6%81%E5%8C%BA%E5%88%AB%E5%92%8C%E7%94%A8%E6%B3%95%E4%BD%A0%E7%9F%A5%E9%81%93%E5%90%97%EF%BC%9F.md) [14、http1.0與2.0的主要區別](14%E3%80%81http1.0%E4%B8%8E2.0%E7%9A%84%E4%B8%BB%E8%A6%81%E5%8C%BA%E5%88%AB.md) [15、uniapp多端適配怎么做到的？](15%E3%80%81uniapp%E5%A4%9A%E7%AB%AF%E9%80%82%E9%85%8D%E6%80%8E%E4%B9%88%E5%81%9A%E5%88%B0%E7%9A%84%EF%BC%9F.md) [16、vue打包過程是怎么執行的？](16%E3%80%81vue%E6%89%93%E5%8C%85%E8%BF%87%E7%A8%8B%E6%98%AF%E6%80%8E%E4%B9%88%E6%89%A7%E8%A1%8C%E7%9A%84%EF%BC%9F.md)