[javascript] Safely turning a JSON string into an object

Official documentation:

The JSON.parse() method parses a JSON string, constructing the JavaScript value or object described by the string. An optional reviver function can be provided to perform a transformation on the resulting object before it is returned.

Syntax:

JSON.parse(text[, reviver])

Parameters:

text : The string to parse as JSON. See the JSON object for a description of JSON syntax.

reviver (optional) : If a function, this prescribes how the value originally produced by parsing is transformed, before being returned.

Return value

The Object corresponding to the given JSON text.

Exceptions

Throws a SyntaxError exception if the string to parse is not valid JSON.

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