Basic usage of `DOMParser` (for XML)

dom-parser-xml-example.js

const {log} = console,
    
    groupContent = '.'.repeat(5).split('').reduce((agg, _, i) => {
        return agg + `<item>` + 
            `<title>Item ${i}</title>` +
        `</item>`;
    }, ''),
    
    docContent = `<group>${groupContent}</group>`,
    
    parsedToDOM = new DOMParser().parseFromString(docContent, 'application/xml'),
    groups = parsedToDOM.children.item(0),
    groupsLen = groups.childElementCount;

log(`Num children in \`group\`: 
  ${parsedToDOM.children.item(0).childElementCount}`);

// Looping through elements in `NodeList`
for (let i = 0; i < groupsLen; i += 1) {
    const group = parsedToDOM.children.item(i);
    // ...
}

// Looping through elements via modern (potentially slower (depending on browser impl.)) approach
for (const group of parsedToDOM.children) {
    log('group: ');
    // ...
    
    for (const item of group.children) {
        log('item: ', item);
        // ...
        // if (failedPredicate) continue;
        // if (matchingPredicate) {
        //   performSomeWork();
        // }
    }
}