Eval() = Unexpected token : error

2018-05-31 19:45:47

I tried this simple JavaScript code:

eval('{"Topics":["toto","tata","titi"]}')

In the Chrome console, for example, this returns

SyntaxError: Unexpected token :

I tried the JSON on JSONLint and it's valid.

Do you see the bug?

FWIW, use JSON.parse instead. Safer than eval .

Because eval does not force an expression context and the string provided is an invalid JavaScript program, thus the first three tokens (and how they are looked at) are:

{            // <-- beginning of a block, and NOT an Object literal
"Topics"     // <-- string value, okay (note this is NOT a label)
:            // <-- huh? expecting ";" or "}" or an operator, etc.

Happy coding.

You have to write like this

eval('('+stingJson+')' );

to convert an string to Object

Hope I help!

链接地址: http://www.djcxy.com/p/8018.html

上一篇: 使用Chrome：未捕获的SyntaxError：意外的令牌<

下一篇: Eval（）=意外标记：错误