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createerror
Advanced tools
Readme
Helper for creating easily extensible and subclassable JavaScript Error classes.
Make sure you have node.js and npm installed, then run:
npm install createerror
var createError = require('createerror');
var MyError = createError({
name: 'MyError',
// Used when no message is handed to the constructor:
message: 'A slightly longer description of the error'
});
Instances can carry extra data about the error:
try {
throw new MyError({
message: "The message", // Not mandatory
data: {disallowedIds: [1, 3, 4, 6]}
});
} catch(e) {
console.warn(e.data); // {disallowedIds: [1, 3, 4, 6]}
}
Inheriting from an existing Error class (the Error classes in the
httpErrors module also use
createError
):
var httpErrors = require('httperrors');
var NotFoundUnderTheBedError = createError({
name: 'NotFoundUnderTheBed',
message: 'I looked under the bed, but it was not found'
}, httpErrors.NotFound);
Instances of this error walk and quack like httpErrors.NotFound
instances, of course:
var ohDear = new NotFoundUnderTheBedError('No monsters today');
console.warn(ohDear.NotFound); // true
console.warn(ohDear.NotFoundUnderTheBed); // true
3-clause BSD license -- see the LICENSE
file for details.
FAQs
Helper for creating easily extensible and subclassable JavaScript Error classes.
The npm package createerror receives a total of 46,731 weekly downloads. As such, createerror popularity was classified as popular.
We found that createerror demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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