how to check if a value is nan in javascrlpt code example
Example 1: javascript check if is nan
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//true
Example 2: check if value is NaN
Number.isNaN(123)
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//true
Number.isNaN(123)