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how to handle 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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