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Interface JSONPathOptions

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Properties

Optional autostart

autostart: boolean

If this is supplied as false, one may call the evaluate method manually.

default

true

Optional callback

If supplied, a callback will be called immediately upon retrieval of an end point value.

The three arguments supplied will be the value of the payload (according to resultType), the type of the payload (whether it is a normal "value" or a "property" name), and a full payload object (with all resultTypes).

default

undefined

Optional flatten

flatten: boolean

Whether the returned array of results will be flattened to a single dimension array.

default

false

json

json: string | number | boolean | object | any[]

The JSON object to evaluate (whether of null, boolean, number, string, object, or array type).

Optional otherTypeCallback

otherTypeCallback: JSONPathOtherTypeCallback

In the current absence of JSON Schema support, one can determine types beyond the built-in types by adding the perator @other() at the end of one's query.

If such a path is encountered, the otherTypeCallback will be invoked with the value of the item, its path, its parent, and its parent's property name, and it should return a boolean indicating whether the supplied value belongs to the "other" type or not (or it may handle transformations and return false).

default

undefined <A function that throws an error when @other() is encountered>

Optional parent

parent: any

In the event that a query could be made to return the root node, this allows the parent of that root node to be returned within results.

default

null

Optional parentProperty

parentProperty: any

In the event that a query could be made to return the root node, this allows the parentProperty of that root node to be returned within results.

default

null

path

path: string | any[]

The JSONPath expression as a (normalized or unnormalized) string or array.

Optional preventEval

preventEval: boolean

Although JavaScript evaluation expressions are allowed by default, for security reasons (if one is operating on untrusted user input, for example), one may wish to set this option to true to throw exceptions when these expressions are attempted.

default

false

Optional resultType

resultType: "value" | "path" | "pointer" | "parent" | "parentProperty" | "all"

Can be case-insensitive form of "value", "path", "pointer", "parent", or "parentProperty" to determine respectively whether to return results as the values of the found items, as their absolute paths, as JSON Pointers to the absolute paths, as their parent objects, or as their parent's property name.

If set to "all", all of these types will be returned on an object with the type as key name.

default

'value'

Optional sandbox

sandbox: Map<string, any>

Key-value map of variables to be available to code evaluations such as filtering expressions. (Note that the current path and value will also be available to those expressions; see the Syntax section for details.)

Optional wrap

wrap: boolean

Whether or not to wrap the results in an array.

If wrap is set to false, and no results are found, undefined will be returned (as opposed to an empty array when wrap is set to true).

If wrap is set to false and a single non-array result is found, that result will be the only item returned (not within an array).

An array will still be returned if multiple results are found, however. To avoid ambiguities (in the case where it is necessary to distinguish between a result which is a failure and one which is an empty array), it is recommended to switch the default to false.

default

true

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