parsing-html-syntax-in-browser-deno-and-node.mjs

// Deno Support
if ('Deno' in globalThis) {
  globalThis.DOMParser = (await import('https://deno.land/x/deno_dom/deno-dom-wasm.ts')).DOMParser
}

// Node Support
if ('process' in globalThis) {
  const jsdom = (await import('jsdom')).default.JSDOM

  globalThis.DOMParser = class {
    parseFromString(string = '', mode = '') {
      return (new jsdom(string)).window.document
    }
  }
}

console.log(
  new DOMParser()
    .parseFromString(`one<p><b>two<p>three</b>`, 'text/html')
    .body
    .innerHTML
)

// Should log: one<p><b>two</b></p><p><b>three</b></p>