Testeur d'expressions JSONPath

JSONPath is a query language for extracting data from JSON documents, inspired by XPath for XML. While XPath navigates XML's tree structure with axes like parent, child, and sibling, JSONPath focuses on JSON's simpler object/array model using dot notation and bracket syntax. JSONPath uses $ for the root, dot notation for properties, and bracket notation for array indices and filters. It lacks some XPath features like reverse axes but is simpler to learn and use.

The recursive descent operator (..) searches through all levels of a JSON document to find matching keys, regardless of their depth. For example, $..name finds every 'name' field anywhere in the document. This is powerful for querying deeply nested or irregularly structured data where you know what field you want but not exactly where it lives. It's equivalent to XPath's // operator.

Array slicing uses Python-style notation [start:end:step] to select ranges of elements by position — for example [0:3] selects the first three elements. Filter expressions use [?(@.condition)] syntax to select elements based on their content — for example [?(@.price < 10)] selects objects where the price field is less than 10. Slicing is positional while filtering is conditional.