js throw error
throw new Error('Whoops!')js throw custom error
class CustomError extends Error {
constructor(foo = 'bar', ...params) {
// Pass remaining arguments (including vendor specific ones) to parent constructor
super(...params)
// Maintains proper stack trace for where our error was thrown (only available on V8)
if (Error.captureStackTrace) {
Error.captureStackTrace(this, CustomError)
}
this.name = 'CustomError'
// Custom debugging information
this.foo = foo
this.date = new Date()
}
}
try {
throw new CustomError('baz', 'bazMessage')
} catch(e) {
console.error(e.name) //CustomError
console.error(e.foo) //baz
console.error(e.message) //bazMessage
console.error(e.stack) //stacktrace
}js errors
JS Errors
try
Lets you define a block of code to test for errors
catch
Set up a block of code to execute in case of an error
throw
Create custom error messages instead of the standard JavaScript errors
finally
Lets you execute code, after try and catch, regardless of the resultCopyright © 2021 Codeinu
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