jquery - Trigger a redirect to a page on form submission after three incorrect attempts in Javascript -


i have page coupon field, page should allow 3 incorrect attempts after has redirect page. tried setting counters couldn't make work. please on below code.

function validatecoupon() {    var couponkey = ["abcdef1", "abcdef2", "abcdef3", "abcdef4", "abcdef5", "abcdef6", "abcdef7"];    var keyinput = $('#coupon').val().trim().touppercase();     if (couponkey.indexof(keyinput) > -1) {      return true;   }  else {     alert("invalid key");     return false;   } }

after 3 failed attempts, want redirect page.

it's possible kept counter inside of function? might've reset each time called function. keep counter outside scope of function.

try out. 

let timesattemped = 0;  function validatecoupon() {    var couponkey = ["abcdef1", "abcdef2", "abcdef3", "abcdef4", "abcdef5", "abcdef6", "abcdef7"];    var keyinput = $('#coupon').val().trim().touppercase();     if (couponkey.indexof(keyinput) > -1) {      return true;   }    else if (timesattempted < 3) {     alert("invalid key");     timesattempted++     return false;   } else if (timesattempted === 3) {     window.location.href = "http://www.lolrofl.com" // redirect logic here   } }

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