example/client-strategy-script/index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Autoupdater Example (Script Strategy)</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
  </head>
  <body>
    <pre id="output"></pre>
    <script>
      const AutoUpdater = require( "nw-autoupdater" ),
            updater = new AutoUpdater( require( "./package.json" ), {
              strategy: "ScriptSwap"
            }),
            output =  document.querySelector( "#output" );

      async function main(){
        try {

          // Download/unpack update if any available
          const rManifest = await updater.readRemoteManifest();
          const needsUpdate = await updater.checkNewVersion( rManifest );
          if ( !needsUpdate ) {
            output.innerHTML += `\nApp is up to date...`;
            return;
          }
          if ( !confirm( "New release is available. Do you want to upgrade?" ) ) {
            return;
          }

          // Subscribe for progress events
          updater.on( "download", ( downloadSize, totalSize ) => {
            output.innerHTML = `Downloading...`;
            console.log( "download progress", Math.floor( downloadSize / totalSize * 100 ), "%" );
          });
          updater.on( "install", ( installFiles, totalFiles ) => {
            output.innerHTML = `Installing...\n`;
            console.log( "install progress", Math.floor( installFiles / totalFiles * 100 ), "%" );
          });

          const updateFile = await updater.download( rManifest );
          await updater.unpack( updateFile );
          alert( `The application will automatically restart to finish installing the update` );
          await updater.restartToSwap();
        } catch ( e ) {
          console.error( e );
        }
      }

      output.innerHTML = `Application ver. ${nw.App.manifest.version}\n`;

      main();

    </script>
  </body>
</html>