How to check for internet connection in an ajax request
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Detect the Internet connection is offline?
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Cross-site AJAX requests
115208
Client-side detection of HTTP request method
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AJAX Page Download progress
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How to get "GET" request parameters in JavaScript?
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how to know if the request is ajax in asp.net mvc?
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C#: How to programmatically check a web service is up and running?
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How do I check whether a value in a string is an IP address
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AJAX: Check if a string is JSON?
118252
Quick way to check my broadband speed
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Find out how long an Ajax request took to complete
58175
Is there an API for making a Google Chrome extension that reads the network resource request activity?
29696
How can I monitor internet usage in my network?
51875
Check if Internet Connection Exists with Ruby?
112484
How do you detect a VPN or Proxy connection?
108784
Fast way to check if a server is accessible over the network in C#
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How to check for an active Internet connection on iOS or macOS?