User changes the value of that text box.If user want to close form I must check if changes(recent.value)contains only spaces and if not - just close form, but if it has - alert("Do you realy want to exit without saving changes?")
$('.cancel-button').on('click', function () {
if (recent.value != recent.defaultValue) {
// if changes I must check - if this changes contains only spaces
}
});
Look at below method isSpaceEqual, which removes spaces in data before comparing, returns true when the change is only spaces.
function isSpaceEqual(value1, value2) {
value1 = String(value1 || "");
value2 = String(value2 || "");
return value1.replace(/[ \r\n]/g, "") === value2.replace(/[ \r\n]/g, "");
}
$('.cancel-button').on('click', function () {
if (recent.value != recent.defaultValue) {
// if changes I must check - if this changes contains only spaces
if(isSpaceEqual(recent.value, recent.defaultValue)) {
// change is only spaces, new line or carriage return
} else {
// actual change
}
}
});