I'm on Mobile so console is not a option
For example, for Google Chrome on Android:
1. Open a browser and go to the page you want to analyze.
2. Click on the three dots (or the "More" button) in the upper-right corner of the screen.
3. Select "Developer Tools" from the drop-down menu.
4. In the menu that appears, select "Console".
Safari (iPhone)
1. Open the desired page in the Safari browser.
2. In the menu bar, click "Safari". Go to Settings → Add-ons.
3. At the bottom of the window, check the box "Show the Development menu in the menu bar".
4. In the menu bar, click "Development" and select "Show Web Inspector".
Rather, you're just too lazy to look for a way, it's easier to say it doesn't fit.