freecodecamp.cn
                                
                                
                                
                                    freecodecamp.cn copied to clipboard
                            
                            
                            
                        FCC China open source codebase and curriculum. Learn to code and help nonprofits.
 
  
Challenge [Create a Custom Heading](https://www.freecodecamp.cn/challenges/create-a-custom-heading#?solution=%3Clink%20href%3D%22%2F%2Ffonts.gdgdocs.org%2Fcss%3Ffamily%3DLobster%22%20rel%3D%22stylesheet%22%20type%3D%22text%2Fcss%22%3E%0A%0A%3Cstyle%3E%0A%20%20h2%20%7B%0A%20%20%20%20font-family%3A%20Lobster%2C%20Monospace%3B%0A%20%20%7D%0A%0A%20%20.thick-green-border%20%7B%0A%20%20%20%20border-color%3A%20green%3B%0A%20%20%20%20border-width%3A%2010px%3B%0A%20%20%20%20border-style%3A%20solid%3B%0A%20%20%20%20border-radius%3A%2050%25%3B%0A%20%20%7D%0A%3C%2Fstyle%3E%0A%0A%3Cdiv%20class%3D%22container-fluid%22%3E%0A%20%20%3Ch2%20class%3D%22text-primary%20text-center%22%3ECatPhotoApp%3C%2Fh2%3E%0A%0A%20%20%3Ca%20href%3D%22%23%22%3E%3Cimg%20class%3D%22img-responsive%20thick-green-border%22%20src%3D%22%2Fimages%2Frelaxing-cat.jpg%22%3E%3C%2Fa%3E%0A%0A%20%20%3Cimg%20src%3D%22%2Fimages%2Frunning-cat.jpg%22%20class%3D%22img-responsive%22%3E%0A%20%20%3Cdiv%20class%3D%22row%22%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-4%22%3E%0A%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-block%20btn-primary%22%3ELike%3C%2Fbutton%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-4%22%3E%0A%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-block%20btn-info%22%3EInfo%3C%2Fbutton%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-4%22%3E%0A%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-block%20btn-danger%22%3EDelete%3C%2Fbutton%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%3C%2Fdiv%3E%0A%20%20%3Cp%3EThings%20cats%20%3Cspan%20class%3D%22text-danger%22%3Elove%3A%3C%2Fspan%3E%3C%2Fp%3E%0A%20%20%3Cul%3E%0A%20%20%20%20%3Cli%3Ecat%20nip%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Elaser%20pointers%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Elasagna%3C%2Fli%3E%0A%20%20%3C%2Ful%3E%0A%20%20%3Cp%3ETop%203%20things%20cats%20hate%3A%3C%2Fp%3E%0A%20%20%3Col%3E%0A%20%20%20%20%3Cli%3Eflea%20treatment%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Ethunder%3C%2Fli%3E%0A%20%20%20%20%3Cli%3Eother%20cats%3C%2Fli%3E%0A%20%20%3C%2Fol%3E%0A%20%20%3Cform%20fccfaa%3D%22%2Fsubmit-cat-photo%22%3E%0A%20%20%20%20%3Clabel%3E%3Cinput%20type%3D%22radio%22%20name%3D%22indoor-outdoor%22%3E%20Indoor%3C%2Flabel%3E%0A%20%20%20%20%3Clabel%3E%3Cinput%20type%3D%22radio%22%20name%3D%22indoor-outdoor%22%3E%20Outdoor%3C%2Flabel%3E%0A%20%20%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%3E%20Loving%3C%2Flabel%3E%0A%20%20%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%3E%20Lazy%3C%2Flabel%3E%0A%20%20%20%20%3Clabel%3E%3Cinput%20type%3D%22checkbox%22%20name%3D%22personality%22%3E%20Crazy%3C%2Flabel%3E%0A%20%20%20%20%3Cinput%20type%3D%22text%22%20placeholder%3D%22cat%20photo%20URL%22%20required%3E%0A%20%20%20%20%3Cbutton%20type%3D%22submit%22%3ESubmit%3C%2Fbutton%3E%0A%20%20%3C%2Fform%3E%0A%3C%2Fdiv%3E%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36. Please describe how to reproduce this issue,...
## 注意:这里只处理 FreeCodeCamp.cn 的相关问题,不处理 w3cschool 的任何问题 ## 注意:请不要乱开无意义的 Issue,违者直接加黑名单 ## 注意:Issue 是用来处理代码库中的 bug,不是用来提问题的。完成挑战过程中遇到的代码问题请在[gitter 讨论组](https://gitter.im/FreeCodeCamp/chinese) 或者 QQ 群 526289580 中讨论 (QQ 群验证答案: ___**freeCodeCamp**___ 注意大小写) #### FreeCodeCamp.cn Issue 模板 如何使用本模板: * 尽可能多填些相关信息,方便管理员参考...
Challenge [Target the same element with multiple jQuery Selectors](https://www.freecodecamp.cn/challenges/target-the-same-element-with-multiple-jquery-selectors#?solution=fccss%0A%20%20%24(document).ready(function()%20%7B%0A%20%20%20%20%24(%22button%22).addClass(%22animated%20%22)%3B%0A%20%20%20%20%24(%22.btn%22).addClass(%22shake%22)%3B%0A%20%20%20%20%24(%22%23target1%22).addClass(%22btn-primary%22)%3B%0A%20%20%20%0A%20%20%7D)%3B%0Afcces%0A%0A%3C!--%20%E8%AF%B7%E5%8F%AA%E4%BF%AE%E6%94%B9%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8A%E7%9A%84%E4%BB%A3%E7%A0%81%20--%3E%0A%0A%3Cdiv%20class%3D%22container-fluid%22%3E%0A%20%20%3Ch3%20class%3D%22text-primary%20text-center%22%3EjQuery%20Playground%3C%2Fh3%3E%0A%20%20%3Cdiv%20class%3D%22row%22%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-6%22%3E%0A%20%20%20%20%20%20%3Ch4%3E%23left-well%3C%2Fh4%3E%0A%20%20%20%20%20%20%3Cdiv%20class%3D%22well%22%20id%3D%22left-well%22%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target1%22%3E%23target1%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target2%22%3E%23target2%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target3%22%3E%23target3%3C%2Fbutton%3E%0A%20%20%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-6%22%3E%0A%20%20%20%20%20%20%3Ch4%3E%23right-well%3C%2Fh4%3E%0A%20%20%20%20%20%20%3Cdiv%20class%3D%22well%22%20id%3D%22right-well%22%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target4%22%3E%23target4%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target5%22%3E%23target5%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%22%20id%3D%22target6%22%3E%23target6%3C%2Fbutton%3E%0A%20%20%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%3C%2Fdiv%3E%0A%3C%2Fdiv%3E%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36. Please describe how to...
Challenge [Local Scope and Functions](https://freecodecamp.cn/challenges/local-scope-and-functions#?solution=%0Afunction%20myFunction()%20%7B%0Avar%20myVar%3D%22use%20strict%22%3B%0A%0A%20%20console.log(myVar)%3B%0A%7D%0AmyFunction()%3B%0A%0A%2F%2F%20%E8%AF%B7%E5%85%88%E8%BF%90%E8%A1%8C%E8%BF%99%E6%AE%B5%E4%BB%A3%E7%A0%81%EF%BC%8C%E5%B9%B6%E5%9C%A8%E5%B7%A6%E8%BE%B9%E7%9A%84%E8%BE%93%E5%87%BA%E5%8C%BA%E5%9F%9F%E6%88%96%E6%B5%8F%E8%A7%88%E5%99%A8%E7%9A%84%E6%8E%A7%E5%88%B6%E5%8F%B0%E4%B8%AD%E6%9F%A5%E7%9C%8B%E8%BE%93%E5%87%BA%0A%2F%2F%20%E7%94%B1%E4%BA%8E%20myVar%20%E5%9C%A8%20myFunction%20%E5%86%85%E5%A4%96%E5%9D%87%E6%B2%A1%E6%9C%89%E5%AE%9A%E4%B9%89%EF%BC%8C%E5%9B%A0%E6%AD%A4%E6%89%8D%E4%BC%9A%E6%9C%89%E6%8A%A5%E9%94%99%0A%0A%2F%2F%20%E7%8E%B0%E5%9C%A8%EF%BC%8C%E5%9C%A8%20myFunction%20%E4%B8%AD%E5%AE%9A%E4%B9%89%20myVar%EF%BC%8C%E5%B9%B6%E5%88%A0%E6%8E%89%20myFunction%20%E5%A4%96%E9%9D%A2%E7%9A%84%20console.log%20%E9%82%A3%E4%B8%80%E8%A1%8C%0A%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 SE 2.X MetaSr 1.0. Please describe how to...
Challenge [Local Scope and Functions](https://freecodecamp.cn/challenges/local-scope-and-functions#?solution=%0Afunction%20myFunction()%20%7B%0Avar%20myVar%3D%22use%20strict%22%3B%0A%0A%20%20console.log(myVar)%3B%0A%7D%0AmyFunction()%3B%0A%0A%2F%2F%20%E8%AF%B7%E5%85%88%E8%BF%90%E8%A1%8C%E8%BF%99%E6%AE%B5%E4%BB%A3%E7%A0%81%EF%BC%8C%E5%B9%B6%E5%9C%A8%E5%B7%A6%E8%BE%B9%E7%9A%84%E8%BE%93%E5%87%BA%E5%8C%BA%E5%9F%9F%E6%88%96%E6%B5%8F%E8%A7%88%E5%99%A8%E7%9A%84%E6%8E%A7%E5%88%B6%E5%8F%B0%E4%B8%AD%E6%9F%A5%E7%9C%8B%E8%BE%93%E5%87%BA%0A%2F%2F%20%E7%94%B1%E4%BA%8E%20myVar%20%E5%9C%A8%20myFunction%20%E5%86%85%E5%A4%96%E5%9D%87%E6%B2%A1%E6%9C%89%E5%AE%9A%E4%B9%89%EF%BC%8C%E5%9B%A0%E6%AD%A4%E6%89%8D%E4%BC%9A%E6%9C%89%E6%8A%A5%E9%94%99%0A%0A%2F%2F%20%E7%8E%B0%E5%9C%A8%EF%BC%8C%E5%9C%A8%20myFunction%20%E4%B8%AD%E5%AE%9A%E4%B9%89%20myVar%EF%BC%8C%E5%B9%B6%E5%88%A0%E6%8E%89%20myFunction%20%E5%A4%96%E9%9D%A2%E7%9A%84%20console.log%20%E9%82%A3%E4%B8%80%E8%A1%8C%0A%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 SE 2.X MetaSr 1.0. Please describe how to...
WHY?
Challenge [Target the same element with multiple jQuery Selectors](https://www.freecodecamp.cn/challenges/target-the-same-element-with-multiple-jquery-selectors#?solution=fccss%0A%20%20%24(document).ready(function()%20%7B%0A%20%20%20%20%24(%22button%22).addClass(%22animated%22)%3B%0A%20%20%20%20%24(%22.btn%22).addClass(%22shake%22)%3B%0A%20%20%20%20%24(%22%23target1%22).adClass(%22btn-primary%22)%0A%20%20%7D)%3B%0Afcces%0A%0A%3C!--%20%E8%AF%B7%E5%8F%AA%E4%BF%AE%E6%94%B9%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8A%E7%9A%84%E4%BB%A3%E7%A0%81%20--%3E%0A%0A%3Cdiv%20class%3D%22container-fluid%22%3E%0A%20%20%3Ch3%20class%3D%22text-primary%20text-center%22%3EjQuery%20Playground%3C%2Fh3%3E%0A%20%20%3Cdiv%20class%3D%22row%22%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-6%22%3E%0A%20%20%20%20%20%20%3Ch4%3E%23left-well%3C%2Fh4%3E%0A%20%20%20%20%20%20%3Cdiv%20class%3D%22well%22%20id%3D%22left-well%22%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target1%22%3E%23target1%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target2%22%3E%23target2%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target3%22%3E%23target3%3C%2Fbutton%3E%0A%20%20%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3Cdiv%20class%3D%22col-xs-6%22%3E%0A%20%20%20%20%20%20%3Ch4%3E%23right-well%3C%2Fh4%3E%0A%20%20%20%20%20%20%3Cdiv%20class%3D%22well%22%20id%3D%22right-well%22%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target4%22%3E%23target4%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target5%22%3E%23target5%3C%2Fbutton%3E%0A%20%20%20%20%20%20%20%20%3Cbutton%20class%3D%22btn%20btn-default%20target%20%22%20id%3D%22target6%22%3E%23target6%3C%2Fbutton%3E%0A%20%20%20%20%20%20%3C%2Fdiv%3E%0A%20%20%20%20%3C%2Fdiv%3E%0A%20%20%3C%2Fdiv%3E%0A%3C%2Fdiv%3E%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36. Please describe how...
var
Challenge [Increment a Number with JavaScript](https://www.freecodecamp.cn/challenges/increment-a-number-with-javascript#?solution=var%20myVar%20%3D%2087%3B%0A%0A%2F%2F%20%E8%AF%B7%E5%8F%AA%E4%BF%AE%E6%94%B9%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8B%E7%9A%84%E4%BB%A3%E7%A0%81%0Avar%20myVar%20%3D%20i%2B%2B%3B%0A%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36. Please describe how to reproduce this issue,...
Challenge [Accessing Objects Properties with Variables](https://www.freecodecamp.cn/challenges/accessing-objects-properties-with-variables#?solution=%2F%2F%20%E5%88%9D%E5%A7%8B%E5%8C%96%E5%8F%98%E9%87%8F%0Avar%20testObj%20%3D%20%7B%0A%20%2012%3A%20%22Namath%22%2C%0A%20%2016%3A%20%22Montana%22%2C%0A%20%2019%3A%20%22Unitas%22%0A%7D%3B%0A%0A%2F%2F%20%E8%AF%B7%E5%8F%AA%E4%BF%AE%E6%94%B9%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8B%E7%9A%84%E4%BB%A3%E7%A0%81%0A%0Avar%20playerNumber%3D16%3B%20%20%20%20%20%20%20%2F%2F%20%E4%BF%AE%E6%94%B9%E8%BF%99%E4%B8%80%E8%A1%8C%0Avar%20player%20%3D%20testObj%5B16%5D%3B%20%20%20%2F%2F%20%E4%BF%AE%E6%94%B9%E8%BF%99%E4%B8%80%E8%A1%8C%0A) has an issue. User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36. Please describe how to reproduce this issue,...