console 命令行工具 X clear

console

console.log(`start`)
if('serviceWorker' in navigator) {
    window.addEventListener('load', ()=> {
       navigator.serviceWorker.register('./serviceworker.js').then((registration)=>{
           console.log(`registered the serviceworker ${registration.scope}`);
       }).catch((e) => {
           console.log(`出错了`)
       }); 
    });
} else {
    console.log(`不支持serviceworkder`)
}

<html>

</html>