Well I'm a beginner in ajax and wanted to know how I can do an Internet connection check, and display a message on the screen whether or not I have an active internet connection (I imagine this is possible with Ajax, but I still do not find anything satisfactory on the internet.)
Here are some examples of what I want to do:
Source:yahoo.com
Source: olx.com.br
Thanks in advance for any contribution! ...
When you click the button you can do this
if (navigator.onLine) {
console.log('online'); //mas voce coloca seu algoritmo
} else {
console.log('offline');
}
source: link
Does not work in Opera , in case you would have to make a request with Ajax for your own website, if the request fails,
If you want to test the connection in general, you can use navigator.onLine . Already if you want to put a timeout on your AJAX calls you can use the parameter timeout (if using Jquary) that accepts a number that is the time in milliseconds that the function should expect a return. After this, an exception is thrown. Here's an example of how to use it:
$.ajax({
url: 'script.php',
method: 'post',
dataType:"json",
timeout: 60000,
error: function(jqXHR, exception){
if(exception == 'timeout'){
alert('Tempo limite de 6 segundos foi ultrapassado');
}
}
});