關於 eval 的報錯 Uncaught ReferenceError: False is not defined
阿新 • • 發佈：2018-11-11
var obj ={'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}
VM3614:1 Uncaught ReferenceError: False is not defined
at <anonymous>:1:47
(anonymous) @ VM3614:1
var obj
undefined
obj ={'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}
VM3633:1 Uncaught ReferenceError: False is not defined
at <anonymous>:1:43
(anonymous) @ VM3633:1
obj = "{'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}"
"{'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}"
alert(obj)
undefined
var oo =eval("("+obj+")")
VM3699:1 Uncaught ReferenceError: False is not defined
at eval (eval at <anonymous> ((index):1), <anonymous>:1:39)
at <anonymous>:1:9
(anonymous) @ VM3699:1
(anonymous) @ VM3698:1
var oo =eval(obj)
VM3724:1 Uncaught SyntaxError: Unexpected token :
at <anonymous>:1:14
(anonymous) @ VM3723:1
obj
"{'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}"
typeof obj
"string"
obj ={'id': 16, 'name': '管理員', 'delflag': False, 'grade': 1000000.0}
VM3755:1 Uncaught ReferenceError: False is not defined
at <anonymous>:1:43
(anonymous) @ VM3755:1
obj ={'id': 16, 'name': '管理員', 'grade': 1000000.0}
{id: 16, name: "管理員", grade: 1000000}
alert(obj)
undefined
var test =eval("("+obj+")")
VM3847:1 Uncaught SyntaxError: Unexpected identifier
at <anonymous>:1:23
(anonymous) @ VM3846:1
var test =eval("("+"obj"+")")
undefined
typeof test
"object"
alert(test)
undefined
原因是：字典裡儲存了一個False的變數，js無法識別，SO 報錯