.catch in javascript code example

Example 1: try catch in javascript

try {
  // Try to run this code 
}
catch(err) {
  // if any error, Code throws the error
}
finally {
  // Always run this code regardless of error or not
  //this block is optional
}

Example 2: catch javascript

//Catch is the method used when your promise has been rejected.
//It is executed immediately after a promise's reject method is called.
//Here’s the syntax:


myPromise.catch(error => {
  // do something with the error.
});

//error is the argument passed in to the reject method.

Example 3: javascript try

var someNumber = 1;
try {
  someNumber.replace("-",""); //You can't replace a int
} catch(err) {
 console.log(err);
}

Example 4: try catch javascript

"The try...catch statement marks a block of statements to try and specifies"
"a response should an exception be thrown."

try {
  nonExistentFunction();
} catch (error) {
  console.error(error);
  // expected output: ReferenceError: nonExistentFunction is not defined
  // Note - error messages will vary depending on browser
}

Example 5: javascript try catch

<html>  
<head>Exception Handling</head>  
<body>  
<script>  
try {  
   throw new Error('This is the throw keyword'); //user-defined throw statement.  
}  
catch (e) {  
  document.write(e.message); // This will generate an error message  
}  
</script>  
</body>  
</html>

Example 6: try catch error

try {
console.log('hello');
}
catch (e){
}

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