debugging in browser

1. https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor
2. https://stackoverflow.com/questions/39228657/disable-chrome-strict-mime-type-checking
3. right click on web page 
1. choose inspect element
2. click on network
3. now reload the page or click on submit and check the data
4. https://stackoverflow.com/questions/819213/how-to-debug-javascript-error
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