语法错误：JSON.解析：错误的解析

JSON.parse() 抛出的 JavaScript 异常发生在字符串无法解析为 JSON 时。

¥The JavaScript exceptions thrown by JSON.parse() occur when string failed to be parsed as JSON.

信息

¥Message

SyntaxError: JSON.parse: unterminated string literal
SyntaxError: JSON.parse: bad control character in string literal
SyntaxError: JSON.parse: bad character in string literal
SyntaxError: JSON.parse: bad Unicode escape
SyntaxError: JSON.parse: bad escape character
SyntaxError: JSON.parse: unterminated string
SyntaxError: JSON.parse: no number after minus sign
SyntaxError: JSON.parse: unexpected non-digit
SyntaxError: JSON.parse: missing digits after decimal point
SyntaxError: JSON.parse: unterminated fractional number
SyntaxError: JSON.parse: missing digits after exponent indicator
SyntaxError: JSON.parse: missing digits after exponent sign
SyntaxError: JSON.parse: exponent part is missing a number
SyntaxError: JSON.parse: unexpected end of data
SyntaxError: JSON.parse: unexpected keyword
SyntaxError: JSON.parse: unexpected character
SyntaxError: JSON.parse: end of data while reading object contents
SyntaxError: JSON.parse: expected property name or '}'
SyntaxError: JSON.parse: end of data when ',' or ']' was expected
SyntaxError: JSON.parse: expected ',' or ']' after array element
SyntaxError: JSON.parse: end of data when property name was expected
SyntaxError: JSON.parse: expected double-quoted property name
SyntaxError: JSON.parse: end of data after property name when ':' was expected
SyntaxError: JSON.parse: expected ':' after property name in object
SyntaxError: JSON.parse: end of data after property value in object
SyntaxError: JSON.parse: expected ',' or '}' after property value in object
SyntaxError: JSON.parse: expected ',' or '}' after property-value pair in object literal
SyntaxError: JSON.parse: property names must be double-quoted strings
SyntaxError: JSON.parse: expected property name or '}'
SyntaxError: JSON.parse: unexpected character
SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data

错误类型

¥Error type

SyntaxError

什么地方出了错？

¥What went wrong?

JSON.parse() 将字符串解析为 JSON。该字符串必须是有效的 JSON，如果遇到不正确的语法，将会抛出此错误。

¥JSON.parse() parses a string as JSON. This string has to be valid JSON and will throw this error if incorrect syntax was encountered.

示例

¥Examples

JSON.parse() 不允许尾随逗号

¥JSON.parse() does not allow trailing commas

这两行都会抛出语法错误：

¥Both lines will throw a SyntaxError:

js
JSON.parse("[1, 2, 3, 4,]");
JSON.parse('{"foo": 1,}');
// SyntaxError JSON.parse: unexpected character
// at line 1 column 14 of the JSON data

省略尾随逗号以正确解析 JSON：

¥Omit the trailing commas to parse the JSON correctly:

js
JSON.parse("[1, 2, 3, 4]");
JSON.parse('{"foo": 1}');

属性名称必须是双引号字符串

¥Property names must be double-quoted strings

你不能在属性周围使用单引号，例如 'foo'。

¥You cannot use single-quotes around properties, like 'foo'.

js
JSON.parse("{'foo': 1}");
// SyntaxError: JSON.parse: expected property name or '}'
// at line 1 column 2 of the JSON data

而是写 "foo"：

¥Instead write "foo":

js
JSON.parse('{"foo": 1}');

前导零和小数点

¥Leading zeros and decimal points

不能使用前导零，例如 01，并且小数点后必须至少跟一位数字。

¥You cannot use leading zeros, like 01, and decimal points must be followed by at least one digit.

js
JSON.parse('{"foo": 01}');
// SyntaxError: JSON.parse: expected ',' or '}' after property value
// in object at line 1 column 2 of the JSON data

JSON.parse('{"foo": 1.}');
// SyntaxError: JSON.parse: unterminated fractional number
// at line 1 column 2 of the JSON data

相反，只写 1，不加零，并在小数点后至少使用一位数字：

¥Instead write just 1 without a zero and use at least one digit after a decimal point:

js
JSON.parse('{"foo": 1}');
JSON.parse('{"foo": 1.0}');

也可以看看

¥See also