window.navigator.online not working in all browsers and its all versions. Need a generic solution

I need to check the connection availability but, window.navigator.online not working in all browsers and its all version开发者_开发技巧s. Need a generic solution that works in all the browsers and its all versions. It is not working mostly in the Chrome and Safari and in latest version of the Chrome.

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You can't rely on that property.

You could request an image, and if it errors, assume the user is offline.

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Using ajax call to test connectivity is the generic solution.