exception object js code example

Example 1: exception js

function div(){
    let x = prompt('Entrez un premier nombre (numérateur)');
    let y = prompt('Entrez un deuxième nombre (dénominateur)');
    
    if(isNaN(x) || isNaN(y) || x == '' || y == ''){
        throw new Error('Merci de rentrer deux nombres');
    }else if(y == 0){
         throw new Error('Division par 0 impossible')
    }else{
        alert(x / y);
    }
}

try{
    div();
}catch(err){
    alert(err.message);
}finally{
    alert('Ce message s\'affichera quoiqu\'il arrive');
}

Example 2: javascript throw new error

throw new Error("Error message here"); // Uncaught Error: Error message here

Example 3: js errors

JS Error Name Values:
name
Sets or returns the error name
message
Sets or returns an error message in string from
EvalError
An error has occurred in the eval() function
RangeError
A number is “out of range”
ReferenceError
An illegal reference has occurred
SyntaxError
A syntax error has occurred
TypeError
A type error has occurred
URIError
An encodeURI() error has occurred