node-xml2js-xpath
A library for node-xml2js that allows querying the JSON object with XPath syntax.
Install
Use npm:
npm install --save xml2js xml2js-xpath
Usage
To use this library, first you need to some xml2js results to parse. Example:
var xml2js = require("xml2js");
var xpath = require("xml2js-xpath");
xml2js.parseString('<root><element id="15">target</element></root>', function(err, json) {
// find all elements: returns xml2js JSON of the element
var matches = xpath.find(json, "//element");
// find the first element, and get its id:
var matches = xpath.evalFirst(json, "//element", "id");
// Extract text representation of XML document:
assert xpath.jsonText(json) === 'target';
});See test cases for more examples.
XPath Support
This project supports a subset of the the XPath standard:
- Descendent selectors (
//h,/parent/offspring). - Attribute selectors (
/parent/offspring[@attribute='value']). - Tag value selectors (
/parent[offspring='value']). - Order predicate (
/parent/offspring[1])
Notable unsupported features:
- Arithmetic comparisons (
/parent/offspring[@attribute > 12.5]) - Boolean logic (
/parent/offspring[@attribute1 or @attribute2]) - Axes (
/parent/following-sibling::offspring) - Functions (
last(),starts-with(),contains(),text(), etc).