From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- .../reference/errors/json_bad_parse/index.html | 111 +++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 files/zh-cn/web/javascript/reference/errors/json_bad_parse/index.html (limited to 'files/zh-cn/web/javascript/reference/errors/json_bad_parse') diff --git a/files/zh-cn/web/javascript/reference/errors/json_bad_parse/index.html b/files/zh-cn/web/javascript/reference/errors/json_bad_parse/index.html new file mode 100644 index 0000000000..cac9176d80 --- /dev/null +++ b/files/zh-cn/web/javascript/reference/errors/json_bad_parse/index.html @@ -0,0 +1,111 @@ +--- +title: 'SyntaxError: JSON.parse: bad parsing' +slug: Web/JavaScript/Reference/Errors/JSON_bad_parse +tags: + - Errors + - JSON + - JavaScript + - SyntaxError + - 方法 +translation_of: Web/JavaScript/Reference/Errors/JSON_bad_parse +--- +
{{jsSidebar("Errors")}}
+ +

信息

+ +
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

+ +

{{jsxref("SyntaxError")}}

+ +

哪里出错了?

+ +

{{jsxref("JSON.parse()")}} 会把一个字符串解析成 JSON 对象。如果字符串书写正确,那么其将会被解析成一个有效的 JSON,但是这个字符串被检测出错误语法的时候将会抛出错误。

+ +

示例

+ +

JSON.parse() 不允许在末尾添加多余的逗号

+ +

下面两行代码都会抛出错误:

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

省略末尾多余的逗号解析 JSON 就是正确:

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

JSON 的属性名必须使用双引号

+ +

属性名上不能使用单引号,例如: 'foo'。

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

取而代之,写成 "foo":

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

前导 0 和小数点

+ +

数字不能用 0 开头,比如01,并且你的小数点后面必须跟着至少一个数字。

+ +
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
+
+ +

正确的写法应该是只写一个1,不书写前面的0。在小数点的后面至少要跟上一个数字:

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

相关链接

+ + -- cgit v1.2.3-54-g00ecf