xml-utils

The lightest XML parsing library

features

• Only import the functions that you need
• No external dependencies
• Runs the same in NodeJS and Browser
• Supports TypeScript

install

npm install xml-utils

usage

the simple tag object

XML tags are represented by a simple object with an outer and inner property. The "outer" property is the text string that completely encompasses the tag, equivalent to an HTML element's "outerHTML". The "inner" property represents the sub-parts of the tag. It is similar to an HTML element's "textContent". Here's an example of a tag:

{
  outer: "<MDI key="INTERLEAVE">PIXEL</MDI>",
  inner: "PIXEL"
}

get attribute

const getAttribute = require("xml-utils/get-attribute.js");
const xml = `<MDI key="INTERLEAVE">PIXEL</MDI>`;
const key = getAttribute(xml, "key");
// key is "INTERLEAVE"

find one tag by name

const findTagByName = require("xml-utils/find-tag-by-name.js");

const xml = `<Metadata domain="IMAGE_STRUCTURE"><MDI key="INTERLEAVE">PIXEL</MDI></Metadata>`
const tag = findTagByName(xml, "MDI");

tag is

{
  outer: "<MDI key="INTERLEAVE">PIXEL</MDI>",
  inner: "PIXEL"
}

find multiple tags with the same name

const findTagsByName = require("xml-utils/find-tags-by-name.js");
const xml = `
    <Metadata>
      <MDI key="SourceBandIndex">1</MDI>
      <MDI key="STATISTICS_MAXIMUM">255</MDI>
      <MDI key="STATISTICS_MEAN">96.372431147996</MDI>
      <MDI key="STATISTICS_MINIMUM">0</MDI>
      <MDI key="STATISTICS_STDDEV">50.057898474622</MDI>
    </Metadata>
`;
const tags = findTagsByName(xml, "MDI");
// tags is an array of tags

find one tag by path

const findTagByPath = require("xml-utils/find-tag-by-path.js");
const xml = `
       <gmd:referenceSystemIdentifier>
         <gmd:RS_Identifier>
           <gmd:code>
             <gco:CharacterString>4326</gco:CharacterString>
           </gmd:code>
           <gmd:codeSpace>
             <gco:CharacterString>EPSG</gco:CharacterString>
           </gmd:codeSpace>
           <gmd:version>
             <gco:CharacterString>6.11</gco:CharacterString>
           </gmd:version>
         </gmd:RS_Identifier>
       </gmd:referenceSystemIdentifier>
       `;
const tag = findTagByPath(xml, ["gmd:RS_Identifier", "gmd:code", "gco:CharacterString"]);

find multiple tags by path

To get an array of tags that follow a path:

const findTagsByPath = require("xml-utils/find-tags-by-path.js");
const tags = findTagsByPath(xml, ["Metadata", "MDI"]);
// tags is an array of tags

// find description for 10th tag in list
const tags = findTagsByPath(iso, [
  { name: "gmd:onLine", index: 9 }, // using zero-based index
  "gmd:description",
  "gco:CharacterString"
]);

remove comments

const removeComments = require("xml-utils/remove-comments.js");
const xml = `<list>
  <!--<A/>-->
  <B/>
</list>`;
removeComments(xml);
"<list>\n  \n<B/><list>";

remove tags by name

const removeTagsByName = require("xml-utils/remove-tags-by-name.js");

const xml = "<ul><li>A</li><li>B</li></ul>";
removeTagsByName(xml, "li")
"<ul></ul>"

setup

download test files with:

npm run setup

test

npm run test

contact

Post an issue at https://github.com/DanielJDufour/xml-utils/issues or email the package author at [email protected]