if(data && data != “”) alert(data); data will be null in your case, and null != “” , so the if is passing.
Read moreHow do you check for nulls?
How to Test for NULL Values?
Read moreHow check object is null or not in jQuery?
you can check your JavaScript OR jQuery object is empty or not, because we need to check many place our jQuery object is empty, null or undefined etc., So usually, we can check using $. isEmptyObject() as i explained as under.9 Oca 2016
Read moreHow check string is empty or null in jQuery?
isStringNullOrEmpty(val) || val. replace(/\s/g, “”) === ”; } , //If string is null or empty then return Null or else original value nullIfStringNullOrEmpty: function (val) { if (this. isStringNullOrEmpty(val)) { return null; } return val; } }, Utilize this helpers to achieve that.
Read moreIs object empty jQuery?
isEmptyObject( object ) Returns: Boolean. Description: Check to see if an object is empty (contains no enumerable properties).
Read moreHow do you check is null in React?
To check null in JavaScript, use triple equals operator(===) or Object .is() method. To find the difference between null and undefined, use the triple equality operator or Object.is() method. To loosely check if the variable is null, use a double equality operator(==).17 Ağu 2020
Read moreHow do you check for null and undefined in Reactjs?
“javascript check if undefined or null” Code Answer’s
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