WebPageTest Homepage WebPageTest, by Catchpoint Documentation

Web App Manifest Contents

Retrieve the web app manifest for the page and output the manifest URL and contents in JSON format

Contributed by Rick Viscomi

[web-app-manifest]
const response_bodies = $WPT_BODIES;

const manifestURLs = new Set(Array.from(document.querySelectorAll('link[rel=manifest]')).map(link => {
const base = new URL(location.href).origin;
const href = link.getAttribute('href');
return new URL(href, base).href;
}));

const manifests = response_bodies.filter(har => {
return manifestURLs.has(har.url);
}).map(har => {
let manifest;
try {
manifest = JSON.parse(har.response_body);
} catch (e) {
manifest = har.response_body;
}
return [har.url, manifest];
});

return JSON.stringify(Object.fromEntries(manifests), null, 2);