throw err in javascript code example

Example 1: js throw error

throw new Error('Whoops!')

Example 2: javascript how to raise the error

if (..condition..) {
    throw 'Error message';
  }

Example 3: javascript try

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

Example 4: js throw new error

throw new Error("message");