Super small library to retrieve values and attributes from the XML AST generated by xml-reader
Super small (~60 LOC) library for retrieving values and attributes
from the XML AST generated by xml-reader
with an easy-to-use jQuery-like interface.
npm install --save xml-query
The following XML will be used to illustrate all examples
<message id="1001" date="2016-06-19">
<from>Bob</from>
<to>Alice</to>
<subject>Hello</subject>
<body>Bla bla bla</body>
</message>
Let's read the XML using xml-reader.
const XmlReader = require('xml-reader');
const xml =
`<message id="1001" date="2016-06-19">
<from>Bob</from>
<to>Alice</to>
<subject>Hello</subject>
<body>Bla bla bla</body>
</message>`;
const ast = XmlReader.parseSync(xml);
const xmlQuery = require('xml-query');
// creating from single ast
const xq = xmlQuery(ast);
// creating from an array of asts
const xq = xmlQuery([ast, ...more]);
Retrieve one of the elements.
xmlQuery(ast).find('body').get(2); // returns the `subject` node
Find by name. Including top level nodes and all its children.
xmlQuery(ast).find('body'); // xmlQuery containing the body element
Returns true if it has the given element. Faster than find() because it stops on first occurence.
xmlQuery(ast).has('body'); // true
Get all attributes. If a name is provided, it returns the value for that key.
xmlQuery(ast).attr(); // {id: '1001', date: '2016-06-19'}
xmlQuery(ast).attr('id'); // '1001'
Returns a new xmlQuery object containing the children of the top level elements.
xmlQuery(ast).children();
Iterate over a xmlQuery object, executing a function for each element.
xmlQuery(ast).each(node => console.log(node.name));
// from
// to
// subject
// body
Iterate over a xmlQuery object, executing a function for each element. Returns the results in an array.
xmlQuery(ast).map(node => node.name); // ['from', 'to', 'subject', 'body']
Get the value of a property for the first element in the set.
xmlQuery(ast).prop('name'); // 'message'
Get the combined text contents of each element, including their descendants
xmlQuery(ast).find('subject').text(); // 'hello'
Returns a new XmlQuery object for the selected element by index
xmlQuery(ast).children().eq(2); // xmlQuery containing the 'subject' node
Returns a new XmlQuery object for the first element. Same as .eq(0)
xmlQuery(ast).children().first(); // xmlQuery containing the 'from' node
Returns a new XmlQuery object for the last element. Same as .eq(length - 1)
xmlQuery(ast).children().last(); // xmlQuery containing the 'body' node
Number of elements. Returns the same result as .size()
xmlQuery(ast).children().length; // 4
Number of elements. Returns the same result as .length
xmlQuery(ast).children().size(); // 4
MIT
FAQs
Super small library to retrieve values and attributes from the XML AST generated by xml-reader
The npm package xml-query receives a total of 944 weekly downloads. As such, xml-query popularity was classified as not popular.
We found that xml-query demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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