serviceworkerとcatcheAPIを使う
# serviceworkerとcatcheAPI - serviceworkerを使う
if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/sw-test/sw.js', {scope: '/sw-test/'}) .then(function(reg) { // registration worked console.log('Registration succeeded. Scope is ' + reg.scope); }).catch(function(error) { // registration failed console.log('Registration failed with ' + error); }); }