JavaScript’s latest version added exception-handling capabilities. It provides try, catch and finally blocks to handle the exceptions.
Syntax of a try block with catch block:
try{
//block of statements
}catch(exception_var){
}
try{
//block of statements
}catch(exception_var){
}
try{
//block of statements
}catch(exception_var){
}
Syntax of a try block with a final block:
try{
//block of statements
} finally {
}
try{
//block of statements
} finally {
}
try{
//block of statements
} finally {
}
Syntax of try block with catch and finally block:
try{
//block of statements
}catch(exception_var){
}finally{
}
try{
//block of statements
}catch(exception_var){
}finally{
}
try{
//block of statements
}catch(exception_var){
}finally{
}
catch block:
The catch block is used for the exception handler. It is used after the try block.
Syntax:
try{
//block of statements
}catch(exception_var){
}
try{
//block of statements
}catch(exception_var){
}
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>
<!DOCTYPE html>
<html>
<body>
<p id="test"></p>
<script>
try {
showalert("Welcome guest!");
}
catch(error) {
document.getElementById("test").innerHTML = error.message;
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<body>
<p id="test"></p>
<script>
try {
showalert("Welcome guest!");
}
catch(error) {
document.getElementById("test").innerHTML = error.message;
}
</script>
</body>
</html>
Related topics:
- What is JavaScript?
- JavaScript advantages and disadvantages
- Javascript External file
- Javascript isNaN()
- Javascript Undefined and Null
- Javascript Create object
- JavaScript access cookie
- Javascript read cookie
- Javascript get cookie by name
- Javascript detete cookie
- Javascript redirect URL
- Javascript print webpage
- Javascript exceptions