JSON parse unexpected token s

Question

Why is it that whenever I do  -  JSON parse   something      it just parses fine but when I do -  var m    something   JSON parse m     it gives me an error saying -   Unexpected token s

User · Answer

Variables  something  are not valid JSON  verify using http   jsonlint com

User · Answer

valid json string must have double quote   JSON parse   u1  1000  u2  1100            will be ok   no quote cause error  JSON parse  u1 1000 u2 1100          error Uncaught SyntaxError  Unexpected token u in JSON at position 2   single quote cause error  JSON parse   u1  1000  u2  1100          error Uncaught SyntaxError  Unexpected token u in JSON at position 2   You must valid json string at https   jsonlint com

User · Answer

You re asking it to parse the JSON text something  not  something    That s invalid JSON  strings must be in double quotes   If you want an equivalent to your first example   var s     something    var result   JSON parse s

User · Answer

Because JSON has a string data type  which is practically anything between   and     It does not have a data type that matches something

User · Answer

What you are passing to JSON parse method must be a valid JSON after removing the wrapping quotes for string   so something is not a valid JSON but  something  is   A valid JSON is -   JSON   null        boolean literal        or true or false        A JavaScript Number Leading zeroes are prohibited  a decimal point must be followed by at least one digit        or JSONNumber        Only a limited sets of characters may be escaped  certain control characters are prohibited  the Unicode line separator  U 2028  and paragraph separator  U 2029  characters are permitted  strings must be double-quoted        or JSONString         Property names must be double-quoted strings  trailing commas are forbidden         or JSONObject     or JSONArray   Examples -       JSON parse              JSON parse  true       true JSON parse   foo         foo  JSON parse   1  5   false          1  5   false   JSON parse  null       null  JSON parse   foo        error since string should be wrapped by double quotes   You may want to look JSON

[javascript] JSON.parse unexpected token s

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