How to create error message for data array in this javascript?

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The staff score and staff justification is an array value.

What I have tried:

$(document).ready(function(){	
	
	//STAFF
	$("#btnSubmit").click(function(e){
		e.preventDefault();
		var staff_score = $('#staff_score').val();
		var staff_justification = $('#staff_justification').val().trim();

		if (staff_score != '0'){
			var isValid = true;
				
			if (!staff_justification.length){
				isValid = false;
				alert('Please insert your justification');
			}
				
			if (isValid){
				if (confirm("Are you sure with this action?")){
					$(this).append('<input type="hidden" name="mode" value="submit" />');
					$('form').submit();
				}
			}
		}
		else{
			alert('Please insert staff score');
			}
	});
});

Posted 2-Jun-22 18:30pm

Zatil Syamimi

Updated 2-Jun-22 19:47pm

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Member 15627495 · Answer 1 · 2022-06-02T19:47:00

As common trick in JS form validation :

function validate(){
if(test != expected_value){
....;
....;
alert("something went wrong");
return false; // to quit the validation pattern
}

_________

be careful about 'submit' use..
if your form already have a submit button, the form will be send twice. weird thing after that.

---------

length need a comparison with integer .. you test a metric, but call for boolean, Js is low type, sure the 0|false will pass but be careful.
write it in plenty word :

if(myarray.length == 0){...;}

_________

as global advice, write your code again,
by embeding all tests , you made a 'confusing' validation script.

take at :
step 1 : what to do. what is the code needed ?
step 2 : what to do. what is the code needed ?
step 3 : what to do. and so and so..


review your global code pattern :)