let jsUrls = ['https://unpkg.com/litegraph.js@0.7.18/build/litegraph.js']
let styleUrls = ['https://unpkg.com/litegraph.js@0.7.18/css/litegraph.css']

await Promise.all(styleUrls.map((styleUrl) => loadStyle(styleUrl)))
await Promise.all(jsUrls.map((jsUrl) => loadJavascript(jsUrl)))

const loadJavascript = (jsUrl) => {
    return new Promise((resolve, reject) => {
        const script = document.createElement('script')
        script.type = 'text/javascript'
        script.onload = () => resolve('')
        script.onerror = (err) => reject(err)
        script.src = jsUrl
        document.body.appendChild(script)
    })
}

const loadStyle = (styleUrl) => {
    return new Promise((resolve, reject) => {
        const link = document.createElement('link')
        link.rel = 'stylesheet'
        link.href = styleUrl
        link.onload = resolve
        link.onerror = reject
        document.body.appendChild(link)
    })
}