JSON.parse gives error but with eval correct

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JSON.parse gives error but with eval correct

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#1 by (3 votes)

1

I have

var data = '[
    { cod: 2, tipo: 'MAÑANA' }, 
    { cod: 4, tipo: 'NOCHE' }, 
    { cod: 3, tipo: 'TIENDAS V.O.' }
]';

When doing the json pass I get an error:

var aData = JSON.parse(data);

With eval goes well.

var data = eval(data);

What is the problem with parse?

json

asked by Joseba Rodríguez 12.02.2018 в 10:55

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1 answer

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score 3 · Accepted Answer

You are confusing the syntax of a Javascript object with JSON: JSON is a stricter notation:

You can not use single quotes as delimiters.

It is mandatory to put the names of the attributes (the keys) in quotes.

Therefore a valid JSON would be:

var data='[{ "cod": 2, "tipo": "MAÑANA" }, { "cod": 4, "tipo": "NOCHE" }, { "cod": 3, "tipo": "TIENDAS V.O." }]';

var parsedData=JSON.parse(data);

console.log(parsedData)

By the way, I advise you to use the single quotes to delimit text in Javascript, that way you can use the doubles internally without having to escape them "\"así\""