Answers for "throw new error("

throw new error(

throw new Error('Whoops!')

throw new error(

try {
  throw new Error('Whoops!')
} catch (e) {
  console.error(e.name + ': ' + e.message)
}

throw new error(

throw new Exception("Error here");

throw new error(

try {
  throw "I'm Md Abdur Rakib"
  console.log("You'll never reach to me", 123465)
} catch (e) {
  console.log(e); // I'm Md Abdur Rakib
}

throw new error(

try {
  throw "I'm Evil"
  console.log("You'll never reach to me", 123465)
} catch (e) {
  console.log(e); // I'm Evil
}

throw new error(

#Throw new error:

The difference between 'throw new Error' and 'throw someObject' in javascript is that throw new Error wraps the error passed to it in the following format −

{ name: 'Error', message: 'String you pass in the constructor' }

The throw someObject will throw the object as is and will not allow any further code execution from the try block, ie same as throw new Error.

Here is a good explanation about The Error object and throwing your own errors

The Error Object

Just what we can extract from it in an event of an error? The Error object in all browsers support the following two properties:

name: The name of the error, or more specifically, the name of the constructor function the error belongs to.

message: A description of the error, with this description varying depending on the browser.

Six possible values can be returned by the name property, which as mentioned correspond to the names of the error's constructors. They are:

Error Name          Description

EvalError           An error in the eval() function has occurred.

RangeError          Out of range number value has occurred.

ReferenceError      An illegal reference has occurred.

SyntaxError         A syntax error within code inside the eval() function has occurred.
                    All other syntax errors are not caught by try/catch/finally, and will
                    trigger the default browser error message associated with the error. 
                    To catch actual syntax errors, you may use the onerror event.

TypeError           An error in the expected variable type has occurred.

URIError            An error when encoding or decoding the URI has occurred 
                   (ie: when calling encodeURI()).
Throwing your own errors (exceptions)

Instead of waiting for one of the 6 types of errors to occur before control is automatically transferred from the try block to the catch block, you can also explicitly throw your own exceptions to force that to happen on demand. This is great for creating your own definitions of what an error is and when control should be transferred to catch.

throw new error(

try{
throw new Error ('Whoops!)
}catch (e) {
 console.log(e.name + ':' + e.message

throw new error(

try {
    //something that causes an error
} catch (ex){
    if (ex instanceof TypeError){
        //handle the error
    } else if (ex instanceof ReferenceError){
        //handle the error
    } else {
        //handle all others
    }
}

throw new error(

Error Name          Description

EvalError           An error in the eval() function has occurred.

RangeError          Out of range number value has occurred.

ReferenceError      An illegal reference has occurred.

SyntaxError         A syntax error within code inside the eval() function has occurred.
                    All other syntax errors are not caught by try/catch/finally, and will
                    trigger the default browser error message associated with the error. 
                    To catch actual syntax errors, you may use the onerror event.

TypeError           An error in the expected variable type has occurred.

URIError            An error when encoding or decoding the URI has occurred 
                   (ie: when calling encodeURI()).

throw new error(

throw new Error("Your error message");

throw new error(

throw new Error('Whoops!')

throw new error(

try {
  throw new Error('Whoops!')
} catch (e) {
  console.error(e.name + ': ' + e.message)
}

throw new error(

throw new Exception("Error here");

throw new error(

try {
  throw "I'm Md Abdur Rakib"
  console.log("You'll never reach to me", 123465)
} catch (e) {
  console.log(e); // I'm Md Abdur Rakib
}

throw new error(

try {
  throw "I'm Evil"
  console.log("You'll never reach to me", 123465)
} catch (e) {
  console.log(e); // I'm Evil
}

throw new error(

#Throw new error:

The difference between 'throw new Error' and 'throw someObject' in javascript is that throw new Error wraps the error passed to it in the following format −

{ name: 'Error', message: 'String you pass in the constructor' }

The throw someObject will throw the object as is and will not allow any further code execution from the try block, ie same as throw new Error.

Here is a good explanation about The Error object and throwing your own errors

The Error Object

Just what we can extract from it in an event of an error? The Error object in all browsers support the following two properties:

name: The name of the error, or more specifically, the name of the constructor function the error belongs to.

message: A description of the error, with this description varying depending on the browser.

Six possible values can be returned by the name property, which as mentioned correspond to the names of the error's constructors. They are:

Error Name          Description

EvalError           An error in the eval() function has occurred.

RangeError          Out of range number value has occurred.

ReferenceError      An illegal reference has occurred.

SyntaxError         A syntax error within code inside the eval() function has occurred.
                    All other syntax errors are not caught by try/catch/finally, and will
                    trigger the default browser error message associated with the error. 
                    To catch actual syntax errors, you may use the onerror event.

TypeError           An error in the expected variable type has occurred.

URIError            An error when encoding or decoding the URI has occurred 
                   (ie: when calling encodeURI()).
Throwing your own errors (exceptions)

Instead of waiting for one of the 6 types of errors to occur before control is automatically transferred from the try block to the catch block, you can also explicitly throw your own exceptions to force that to happen on demand. This is great for creating your own definitions of what an error is and when control should be transferred to catch.

throw new error(

try{
throw new Error ('Whoops!)
}catch (e) {
 console.log(e.name + ':' + e.message

throw new error(

try {
    //something that causes an error
} catch (ex){
    if (ex instanceof TypeError){
        //handle the error
    } else if (ex instanceof ReferenceError){
        //handle the error
    } else {
        //handle all others
    }
}

throw new error(

Error Name          Description

EvalError           An error in the eval() function has occurred.

RangeError          Out of range number value has occurred.

ReferenceError      An illegal reference has occurred.

SyntaxError         A syntax error within code inside the eval() function has occurred.
                    All other syntax errors are not caught by try/catch/finally, and will
                    trigger the default browser error message associated with the error. 
                    To catch actual syntax errors, you may use the onerror event.

TypeError           An error in the expected variable type has occurred.

URIError            An error when encoding or decoding the URI has occurred 
                   (ie: when calling encodeURI()).

throw new error(

throw new Error("Your error message");