使用 try .. catch .. finally 处理 Javascript 错误

Question

我怀疑我错误地使用了 finally block ，而且我不理解其目的的基本原理...

 function myFunc() {
      try {
           if (true) {
                throw "An error";
           }
      } catch (e) {
           alert (e);
           return false;
      } finally {
           return true;
      }
 }

此函数将运行 catch block ，发出“错误”警报，但随后返回 true。为什么不返回 false？

Answer 1

The finally block contains statements to execute after the try and catch blocks execute but before the statements following the try...catch statement. The finally block executes whether or not an exception is thrown. If an exception is thrown, the statements in the finally block execute even if no catch block handles the exception. more

finally block 将始终运行，尝试在 try block 之后返回 true

function myFunc() {
     try {
         if (true) {
               throw "An error";
          }
          return true;
     } catch (e) {
          alert (e);
          return false;
     } finally {
          //do cleanup, etc here
     }
 }