Parse RSS file to JSON with Vanilla JS

rss2json.vanilla.js

const items = []
fetch('https://example.com/feed.xml')
.then(res => res.text())
.then(str => new window.DOMParser().parseFromString(str, "text/xml"))
.then(data => {
    data.querySelectorAll("item").forEach((item, idx) => {
        const obj = {}
        Array.from(item.children).map(v => obj[v.tagName] = v.textContent)
        items[idx] = obj
    })
})
.catch(console.error)