IsJson - script and chart function

IsJson() tests whether a specified string contains valid JSON (JavaScript Object Notation) data. You can also validate a specific JSON data type.

Syntax:

value IsJson(json [, type])

Return data type: dual

Arguments
Argument	Description
json	String to test. It can contain extra spaces or newlines.
type	Optional argument that specifies the JSON data type to test for. 'value' (default) 'object' 'array' 'string' 'number' 'Boolean' 'null'

Example	Result	Description
IsJson('text')	Returns 0 (false)	'text' is not a valid JSON value
IsJson('"text"', 'number')	Returns 0 (false)	'"text"' is not a valid JSON number
IsJson('"text"', 'text')	Returns 0 (false)	'text' is not a valid JSON type

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