Javascript代码在浏览器中正确执行，但在VSCODE中在代码末尾接收多个“声明或预期语句”错误

Question

我在代码的末尾看到9+错误，上面写着“声明或预期的声明”。我很确定我的语法是正确的，但我可能错了。这个程序运行得很好，只是想知道为什么我会收到这些错误。错误显示在VSCODE中，我在这里看不到错误。下面是一张图片：VSCODE截图 注意:如果您运行该代码，只需输入“退出”，它就会退出.

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let toDoList = [];
let input = prompt("What Would You Like to Do");
    
while (input!== 'quit'){
    
    
if (input === "new".toLowerCase())
     {
       let addAToDo = prompt("What Would You Like to Add?") ;
        toDoList.push(addAToDo)
       
       console.log( `${addAToDo} added to the list!`)
     }

   else if (input === "list".toLowerCase())
     {
       console.log("*********************")
         for(i = 0; i < toDoList.length; i++){
             console.log(`${i}:${toDoList[i]}`)
             
         }
         console.log("*********************")
     }
     
    else if (input === "delete") 
     {
        
        let deletedIndex = parseInt(prompt("Which Index Would You like to Delete?"));
       const deleted = toDoList.splice(deletedIndex, 1)
       console.log(`${deleted} has been Deleted`)
     }

     input = prompt("What Would You Like to Do")
}

console.log("Ok You Quit");

​

Answer 1

有人在你的评论中指出，代码是混乱的。我清理了代码，现在它运行良好。

let toDoList = [];
var input = prompt("What Would You Like to Do");
while (input != 'quit') {
  if (input == "new") {
       var addAToDo = prompt("What Would You Like to Add?");
       toDoList.push(addAToDo);
       console.log(`${addAToDo} added to the list!`);
     } else if (input == "list") {
       console.log("*********************");
       for (i = 0; i < toDoList.length; i++) {
         console.log(`${i}:${toDoList[i]}`);        
       }
       console.log("*********************");
     } else if (input == "delete") { 
       let deletedIndex = parseInt(prompt("Which Index Would You like to Delete?"));
       const deleted = (toDoList).splice(deletedIndex, 1);
       console.log(`${deleted} has been Deleted`);
     } else {
       void(0);
     }
     input = prompt("What Would You Like to Do")
}
console.log("Ok You Quit");

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