AJAX periodical check until conditions are met

I have an application whic开发者_运维问答h communicates with mobile phone gate. User has to send SMS/Text to number and then needs to wait for confirmation.

I'd like to know how to check for response until user receives it. How can I call AJAX check every 10 seconds?

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You can use a spin-off of a long polling technique.

Basically just set a setInterval function that will fire every 10 seconds. The callback function of that will be your ajax call. Make the ajax function check the value of a variable, presumably one that is a boolean representing whether or not the text has been confirmed.

setInterval(function() {
    if(!condition) {
        //ajax functionality again
    }
}, 10*1000);

The reason why I have the !condition part is because I dont want the function to execute all the way if the condition has already come back true, thus confirming the text.

You should then kill the interval function too.