用户完成输入后验证用户输入

Question

what is the best way to validate user input for aa text field when the user is done typing? I am using javascript/jquery. is there a method that knows when the user has clicked out of the text field?

Answer 1

Implement onblur event handler on the textfield which will be triggered when the user tabs out to next field.

Using jQuery,

$('.input_selector').on ('blur', function() {
    var inpValue = $(this).val();
    //validate Code
});

Answer 2

For all those who came here looking for a solution, please check this answer .

Basically:

The solution below solves this problem and will call X seconds after finished as the OP requested. It also no longer requires the redundant keydown function. I have also added a check so that your function call won't happen if your input is empty.

//setup before functions
var typingTimer;                //timer identifier
var doneTypingInterval = 5000;  //time in ms, 5 seconds for example

//on keyup, start the countdown
$('#myInput').keyup(function(){
    clearTimeout(typingTimer);
    if ($('#myInput').val()) {
        typingTimer = setTimeout(doneTyping, doneTypingInterval);
    }
});

//user is "finished typing", do something
function doneTyping() {
    //do something 
}

All credit for the guy who originally posted this answer, just copying in case somebody arrived here (as I did) looking for a solution.