Syntax Error: Unexpected token, expected "{" (1:339)

在你提供的引用中，第一个问题是关于编译过程中出现的"Unexpected token c in JSON at position 0"错误。这通常是由于JavaScript中的JSON解析失败导致的。解决方法是添加一个判断字符串是否为JSON格式的函数，并在使用之前先进行判断。

第二个问题是关于在index.html中引入一个使用ES6模块语法的JavaScript文件时出现的报错。错误信息为"Syntax Error: Unexpected token, expected "{" (1:339)"。这个错误通常是因为浏览器不直接支持ES6的模块语法，需要在script标签中添加type="module"以告诉浏览器应该以模块的方式进行加载。

回答完问题后，下面是

相关问题

SyntaxError: Unexpected token o in JSON at position 1

This error occurs when there is a syntax error in the JSON data. The "Unexpected token o" message indicates that the parser encountered an "o" character in a position where it was not expected.

To fix this error, you need to examine the JSON data and check for any syntax errors, such as missing or extra commas, mismatched brackets or quotes, or invalid data types.

Here is an example of JSON data with a syntax error:

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "Main St"
    "city": "New York"
  }
}

In this example, there is a missing comma after "Main St" in the "address" object. To fix the error, add a comma after "Main St":

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "Main St",
    "city": "New York"
  }
}

SyntaxError: Unexpected token 'var'

This error occurs when the JavaScript interpreter encounters the keyword "var" in a position where it is not expected or allowed.

Possible causes of this error include:

- Incorrect use of keywords: For example, using "var" inside a function declaration instead of at the beginning of a statement.
- Missing or incorrect punctuation: For example, forgetting to close a parenthesis or curly brace.
- Invalid code structure: For example, attempting to declare a variable inside an expression instead of as a standalone statement.

To resolve this error, carefully review your code to ensure that all JavaScript keywords are used correctly and that your code is properly structured.