標籤：oct type head htm func back html function class
怎麼解決這個問題？？
思路就是我們利用正則匹配到所謂的空格，然後替換為空白字元，我們要用到的是str的replace API
代碼如下：
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <body> 8 <script> 9 // 去除字串開頭和結尾的空格10 function delate(str){11 // 匹配到開頭的空格，然後將其替換為空白，返回新字串str112 let str1 = str.replace(/\s+$/,‘‘); 13 // 返回str214 15 let str2 = str1.replace(/^\s+/,‘‘)16 return str2;17 }18 console.log(delate(‘ text ‘));19 console.log(‘ text ‘);20 </script>21 </body>22 </html>
注意： replace的是後面的代替前面的，然後Null 字元是利用\s來代替，然後以什麼開頭是用^ 。。
原生jS之-去掉字串開頭和結尾的Null 字元
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