Exceptions in JavaScript

JavaScript latest version added exception handling capabilities. It provides try, catch and finally blocks to handle the exceptions.

Syntax of try block with catch block:

try{
       //block of statements

}catch(exception_var){

}

Syntax of try block with finally block:

try{
       //block of statements

} finally {

}

Syntax of try block with catch and finally block:

try{
        //block of statements

}catch(exception_var){

}finally{

}

catch block:

Catch block is used for exception handler. It is used after try block.

Syntax :

try{
       //block of statements

}catch(exception_var){

}

Example

<!DOCTYPE html>
<html>
<body>
 
<p id="test"></p>
 
<script>
try {
    showalert("Welcome guest!");
}
catch(error) {
    document.getElementById("test").innerHTML = error.message;
}
</script>
 
</body>
</html>

Example

showalert is not defined

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