JS · 每天一道面試題

[001.數組扁平化并去重排序](default.md) [002.高階函數](%E9%AB%98%E9%98%B6%E5%87%BD%E6%95%B0.md) [003.sort() 對數組進行排序](3.sort%E5%AF%B9%E6%95%B0%E7%BB%84%E8%BF%9B%E8%A1%8C%E6%8E%92%E5%BA%8F.md) [004.call 、 apply 和bind的區別](4.call%E5%92%8Capply%E7%9A%84%E5%8C%BA%E5%88%AB.md) [006.0.1+0.2為什么等于0.30000000000000004](6.0.1+0.2%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%89%E4%BA%8E0.30000000000000004.md) [011.var、let、const 的區別及實現原理？](11.var%E3%80%81let%E3%80%81const%E7%9A%84%E5%8C%BA%E5%88%AB%E5%8F%8A%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86%EF%BC%9F.md) [010.new操作符都做了什么](10.new%E6%93%8D%E4%BD%9C%E7%AC%A6%E9%83%BD%E5%81%9A%E4%BA%86%E4%BB%80%E4%B9%88.md) [009.a.b.c.d 和 a['b']['c']['d']，哪個性能更高？](9.a.b.c.d%E5%92%8Ca%5Bb%5D%5Bc%5D%5Bd%5D%EF%BC%8C%E5%93%AA%E4%B8%AA%E6%80%A7%E8%83%BD%E6%9B%B4%E9%AB%98%EF%BC%9F.md) [016.什么是防抖和節流？有什么區別？如何實現？](016.%E4%BB%80%E4%B9%88%E6%98%AF%E9%98%B2%E6%8A%96%E5%92%8C%E8%8A%82%E6%B5%81%EF%BC%9F%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%9F%E5%A6%82%E4%BD%95%E5%AE%9E%E7%8E%B0%EF%BC%9F.md) [017.['1', '2', '3'].map(parseInt) what & why ?](017..md) [018.為什么 for 循環嵌套順序會影響性能？](018.%E4%B8%BA%E4%BB%80%E4%B9%88for%E5%BE%AA%E7%8E%AF%E5%B5%8C%E5%A5%97%E9%A1%BA%E5%BA%8F%E4%BC%9A%E5%BD%B1%E5%93%8D%E6%80%A7%E8%83%BD%EF%BC%9F.md) [019.介紹模塊化發展歷程](019.%E4%BB%8B%E7%BB%8D%E6%A8%A1%E5%9D%97%E5%8C%96%E5%8F%91%E5%B1%95%E5%8E%86%E7%A8%8B.md) [020.push輸出問題](020.push%E8%BE%93%E5%87%BA%E9%97%AE%E9%A2%98.md) [021.判斷數組的三個方法](021.%E5%88%A4%E6%96%AD%E6%95%B0%E7%BB%84%E7%9A%84%E4%B8%89%E4%B8%AA%E6%96%B9%E6%B3%95.md) [022.全局作用域中，用 const 和 let 聲明的變量不在 window 上，那到底在哪里？如何去獲取？](022.%E5%85%A8%E5%B1%80%E4%BD%9C%E7%94%A8%E5%9F%9F%E4%B8%AD%EF%BC%8C%E7%94%A8const%E5%92%8Clet%E5%A3%B0%E6%98%8E%E7%9A%84%E5%8F%98%E9%87%8F%E4%B8%8D%E5%9C%A8window%E4%B8%8A%EF%BC%8C%E9%82%A3%E5%88%B0%E5%BA%95%E5%9C%A8%E5%93%AA%E9%87%8C%EF%BC%9F%E5%A6%82%E4%BD%95%E5%8E%BB%E8%8E%B7%E5%8F%96%EF%BC%9F.md) [023.輸出以下代碼的執行結果并解釋為什么](023.md) [024.ES6 代碼轉成 ES5 代碼的實現思路是什么](024.ES6%E4%BB%A3%E7%A0%81%E8%BD%AC%E6%88%90ES5%E4%BB%A3%E7%A0%81%E7%9A%84%E5%AE%9E%E7%8E%B0%E6%80%9D%E8%B7%AF%E6%98%AF%E4%BB%80%E4%B9%88.md) [025.為什么普通 for 循環的性能遠遠高于 forEach 的性能，請解釋其中的原因。](025.%E4%B8%BA%E4%BB%80%E4%B9%88%E6%99%AE%E9%80%9Afor%E5%BE%AA%E7%8E%AF%E7%9A%84%E6%80%A7%E8%83%BD%E8%BF%9C%E8%BF%9C%E9%AB%98%E4%BA%8EforEach%E7%9A%84%E6%80%A7%E8%83%BD%EF%BC%8C%E8%AF%B7%E8%A7%A3%E9%87%8A%E5%85%B6%E4%B8%AD%E7%9A%84%E5%8E%9F%E5%9B%A0%E3%80%82.md) [026.數組里面有10萬個數據，取第一個元素和第10萬個元素的時間相差多少](026.%E6%95%B0%E7%BB%84%E9%87%8C%E9%9D%A2%E6%9C%8910%E4%B8%87%E4%B8%AA%E6%95%B0%E6%8D%AE%EF%BC%8C%E5%8F%96%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%83%E7%B4%A0%E5%92%8C%E7%AC%AC10%E4%B8%87%E4%B8%AA%E5%85%83%E7%B4%A0%E7%9A%84%E6%97%B6%E9%97%B4%E7%9B%B8%E5%B7%AE%E5%A4%9A%E5%B0%91.md) [027.變量類型](027.md) [028.原型和原型鏈](028.%E5%8E%9F%E5%9E%8B%E5%92%8C%E5%8E%9F%E5%9E%8B%E9%93%BE.md) [029.作用域和閉包](029.%E4%BD%9C%E7%94%A8%E5%9F%9F%E5%92%8C%E9%97%AD%E5%8C%85.md) [030. 異步](030.%E5%BC%82%E6%AD%A5.md) [031.ES6/7 新標準的考查](031.ES6-7%E6%96%B0%E6%A0%87%E5%87%86%E7%9A%84%E8%80%83%E6%9F%A5.md) [024.事件冒泡/事件代理](024.%E4%BA%8B%E4%BB%B6%E5%86%92%E6%B3%A1.md) [025.手寫 XMLHttpRequest 不借助任何庫](025.%E6%89%8B%E5%86%99XMLHttpRequest%E4%B8%8D%E5%80%9F%E5%8A%A9%E4%BB%BB%E4%BD%95%E5%BA%93.md) [026.什么是深拷貝？](026.%E4%BB%80%E4%B9%88%E6%98%AF%E6%B7%B1%E6%8B%B7%E8%B4%9D%EF%BC%9F.md) [0027.克隆數組的方法](0027.%E5%85%8B%E9%9A%86%E6%95%B0%E7%BB%84%E7%9A%84%E6%96%B9%E6%B3%95.md) [0028.ES6之展開運算符(...)](0028.ES6%E4%B9%8B%E5%B1%95%E5%BC%80%E8%BF%90%E7%AE%97%E7%AC%A6....md) [0029.arguments](arguments.md) [0030. requestAnimationFrame](0030.requestAnimationFrame.md) [0031.遞歸爆棧問題與解決](0031.%E9%80%92%E5%BD%92%E7%88%86%E6%A0%88%E9%97%AE%E9%A2%98%E4%B8%8E%E8%A7%A3%E5%86%B3.md) [021.簡單改造下面的代碼，使之分別打印 10 和 20](021.%E7%AE%80%E5%8D%95%E6%94%B9%E9%80%A0%E4%B8%8B%E9%9D%A2%E7%9A%84%E4%BB%A3%E7%A0%81%EF%BC%8C%E4%BD%BF%E4%B9%8B%E5%88%86%E5%88%AB%E6%89%93%E5%8D%B010%E5%92%8C20.md) [032.箭頭函數與普通函數](5.%E7%AE%AD%E5%A4%B4%E5%87%BD%E6%95%B0%E4%B8%8E%E6%99%AE%E9%80%9A%E5%87%BD%E6%95%B0.md) [033.去除掉html標簽字符串里的所有屬性](7.%E5%8E%BB%E9%99%A4%E6%8E%89html%E6%A0%87%E7%AD%BE%E5%AD%97%E7%AC%A6%E4%B8%B2%E9%87%8C%E7%9A%84%E6%89%80%E6%9C%89%E5%B1%9E%E6%80%A7.md) [034.查找公共父節點](%E6%9F%A5%E6%89%BE%E5%85%AC%E5%85%B1%E7%88%B6%E8%8A%82%E7%82%B9.md) [035.Promise](035.Promise.md) [0036.JSON.stringify ()](0036.JSON.stringify.md)