keyblade
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Fail fast when accessing undefined properties on objects.
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<a href="index.html">All files</a> UndefinedKeyError.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Undefined Key error.
*
* Most of this code is © 2015 Ben Youngblood <https://github.com/bjyoungblood/es6-error>
*/
module.exports = class UndefinedKeyError extends ReferenceError {
/* istanbul ignore next */ // because I ripped this from another project
constructor (message = '') {
super(message)
// extending Error is weird and does not propagate `message`
Object.defineProperty(this, 'message', {
configurable: true,
enumerable: false,
value: message,
writable: true
})
Object.defineProperty(this, 'name', {
configurable: true,
enumerable: false,
value: this.constructor.name,
writable: true
})
if (ReferenceError.hasOwnProperty('captureStackTrace')) {
ReferenceError.captureStackTrace(this, this.constructor)
return
}
Object.defineProperty(this, 'stack', {
configurable: true,
enumerable: false,
value: (new ReferenceError(message)).stack,
writable: true
})
}
}
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