[tips] Workaround when gulp gets stuck

[t2ym]

[tips] Workaround when gulp gets stuck

Root Cause

• There may be some race conditions in gulp demo process

Workaround

• Disable headless mode of Chrome

diff --git a/demo-backend/cacheBundleGeneration.js b/demo-backend/cacheBundleGeneration.js
index 6a829b2b..8c33ebfd 100644
--- a/demo-backend/cacheBundleGeneration.js
+++ b/demo-backend/cacheBundleGeneration.js
@@ -61,8 +61,8 @@ const loadOnly = process.argv[2] === 'loadOnly';
   console.log('serverSecret', serverSecret);
   await new Promise(resolve => setTimeout(resolve, 4000));
   console.log('wait 4000');
-  let browser = await puppeteer.launch({ headless: true, dumpio: false, args: ['--disable-gpu', '--no-sandbox', '--no-setsuid-sandbox'], executablePath: chromePath }); // terse and fastest
-  //let browser = await puppeteer.launch({ headless: false, dumpio: true, args: [ '--disable-gpu', '--enable-logging=stderr' ], executablePath: chromePath });
+  //let browser = await puppeteer.launch({ headless: true, dumpio: false, args: ['--disable-gpu', '--no-sandbox', '--no-setsuid-sandbox'], executablePath: chromePath }); // terse and fastest
+  let browser = await puppeteer.launch({ headless: false, dumpio: true, args: [ '--disable-gpu', '--enable-logging=stderr' ], executablePath: chromePath });
   //let browser = await puppeteer.launch({ headless: false, dumpio: true, args: [ '--disable-gpu', '--enable-logging=stderr', '--auto-open-devtools-for-tabs' ], executablePath: chromePath });
   let page = await browser.newPage();
   await page.setViewport({ width: 1200, height: 800 });