javascript 无法理解为什么JS代码没有在JS Bin中运行

lfapxunr 于 2023-02-07 发布在 Java

关注(0)|答案(2)|浏览(182)

当我试图运行下面的代码时，在JS Bin中得到下面的错误代码，我做错了什么吗？

let myTodos = {
  day: "Monday",
  meetings: 0,
  meetDone: 0,
}

let addMeeting = function(todo, meet = 0) {
  todo.meetings = todo.meetings + meet;  
}

let meetDone = function (todo, meet = 0) {
  todo.meetDone = todo.meetDone - meet; 

}

let resetDay = function (todo) {
  todo.meetings = 0;
  todo.meetDone = 0;
}

let getSummaryOfDay = function (todo) {
  let meetleft = todo.meetings + todo.meetDone;
  return `You have ${meetleft} meetings for today.!`;
}

addMeeting(myTodos, 4);
addMeeting(myTodos, 2);
meetDone(myTodos, 5);
console.log(getSummaryOfDay(myTodos));
console.log (myTodos);

我在JS Bin中得到的错误如下所示。

"error"
 "SyntaxError: Unexpected token '{'
  at https://static.jsbin.com/js/prod/runner-4.1.7.min.js:1:13924
  at https://static.jsbin.com/js/prod/runner-4.1.7.min.js:1:10866"

JavaScript

来源：https://stackoverflow.com/questions/60882724/not-able-to-understand-why-js-code-is-not-running-in-js-bin

2条答案

按热度按时间

h9a6wy2h1#

这是JSBin循环保护中的一个漏洞。
使用此代码（JSBin link）时：

let myTodos = {
  day: "Monday",
  meetings: 0,
  meetDone: 0,
}

let addMeeting = function(todo, meet = 0) {
  todo.meetings = todo.meetings + meet;  
}

let meetDone = function (todo, meet = 0) {
  todo.meetDone = todo.meetDone - meet; 

}

let resetDay = function (todo) {
  todo.meetings = 0;
  todo.meetDone = 0;
}

let getSummaryOfDay = function (todo) {
  let meetleft = todo.meetings + todo.meetDone;
  return `You have ${meetleft} meetings for today.!`;
}

addMeeting(myTodos, 4);
addMeeting(myTodos, 2);
meetDone(myTodos, 5);
console.log(getSummaryOfDay(myTodos));
console.log (myTodos);

JSBin生成将执行的以下文档：

<!DOCTYPE html>

<html>
<head>
  <meta charset=\"utf-8\">
  <meta name=\"viewport\" content=\"width=device-width\">
  <title>JS Bin</title>
<style id=\"jsbin-css\">

</style>
</head>
<body>

<script>try {let myTodos = {
  day: \"Monday\",
  meetings: 0,
  meetDone: 0,
}

let addMeeting = function(todo, meet = 0) {
  todo.meetings = todo.meetings + meet;  
}

let meetDone = function (todo, meet = 0) {
  todo.meetDone = todo.meetDone - meet; 

}

let resetDay = function (todo) {
  todo.meetings = 0;
  todo.meetDone = 0;
}

let getSummaryOfDay = function (todo) {
  let meetleft = todo.meetings + todo.meetDone;
 {
if (window.runnerWindow.protect.prote{;window.runnerWindow.protect.protect({ line: 23, reset: true }); ct({ line: 23 })) break;
 return `You have ${meetleft} meetings for today.!`;
}}

}

addMeeting(myTodos, 4);
addMeeting(myTodos, 2);
meetDone(myTodos, 5);
window.runnerWindow.proxyConsole.log(getSummaryOfDay(myTodos));
window.runnerWindow.proxyConsole.log (myTodos);
} catch (error) { throw error; }

//# sourceURL=xibavicide.js
</script>
</body>
</html>

注意模板文本是如何 Package 在保护代码中的，现在它在语法上是不正确的。
据推测，保护机制是用来阻止无限循环的。
如果您只是删除for（JSBin link），则不会触发保护，生成的文档语法正确：

<!DOCTYPE html>

<html>
<head>
  <meta charset=\"utf-8\">
  <meta name=\"viewport\" content=\"width=device-width\">
  <title>JS Bin</title>
<style id=\"jsbin-css\">

</style>
</head>
<body>

<script>try {let myTodos = {
  day: \"Monday\",
  meetings: 0,
  meetDone: 0,
}

let addMeeting = function(todo, meet = 0) {
  todo.meetings = todo.meetings + meet;  
}

let meetDone = function (todo, meet = 0) {
  todo.meetDone = todo.meetDone - meet; 

}

let resetDay = function (todo) {
  todo.meetings = 0;
  todo.meetDone = 0;
}

let getSummaryOfDay = function (todo) {
  let meetleft = todo.meetings + todo.meetDone;
  return `You have ${meetleft} meetings  today.!`;
}

addMeeting(myTodos, 4);
addMeeting(myTodos, 2);
meetDone(myTodos, 5);
window.runnerWindow.proxyConsole.log(getSummaryOfDay(myTodos));
window.runnerWindow.proxyConsole.log (myTodos);
} catch (error) { throw error; }

//# sourceURL=roqosiyasa.js
</script>
</body>
</html>

您可以使用错误中建议的解决方案-在JavaScript区域的任何位置添加// noprotect注解将阻止触发循环保护。JSBin link

赞(0）回复(0）举报 2023-02-07

wpx232ag2#

在使用jsbin时从Firefox浏览器切换到Chrome为我修复了这个错误。
如果代码没有任何问题，它在两个浏览器中都运行良好。如果有任何问题，Firefox中的错误原因显示为有问题。Chrome中显示正确的原因。

赞(0）回复(0）举报 2023-02-07