行吟阁 2019-12-14
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>最后执行finally</title> <!-- finally{a} 解读:不论之前是否发生错误,错误是否被处理,最后都要执行代码a --> </head> <body> <script> var a=1; try{ throw "我是错误提示";//自定义error massage } catch (b){ console.log(b);//catch()捕获error name=b,b容纳了throw定义的error massage } finally{ console.log("不管前面的对错,反正最后我都要执行");//不论前面怎样,最后都要执行的代码 } </script> </body> </html>