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Rich Trott
d7aa8fa088
Update ESLint to 2.1.0. ESLint has a number of potentially-useful new features but this change attempts to be minimal in its changes. However, some things could not be avoided reasonably. ESLint 2.1.0 found a few lint issues that ESLing 1.x missed with template strings that did not take advantage of any features of template strings, and `let` declarations where `const` sufficed. Additionally, ESLint 2.1.0 removes some granularity around enabling ES6 features. Some features (e.g., spread operator) that had been turned off in our configuration for ESLint 1.x are now permitted. PR-URL: https://github.com/nodejs/node/pull/5214 Reviewed-By: Michaël Zasso <mic.besace@gmail.com> Reviewed-By: jbergstroem - Johan Bergström <bugs@bergstroem.nu> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Myles Borins <myles.borins@gmail.com>
38 lines
957 B
JavaScript
38 lines
957 B
JavaScript
var isObjectLike = require('./isObjectLike');
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/** `Object#toString` result references. */
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var errorTag = '[object Error]';
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/**
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* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var objectToString = objectProto.toString;
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/**
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* Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
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* `SyntaxError`, `TypeError`, or `URIError` object.
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an error object, else `false`.
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* @example
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*
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* _.isError(new Error);
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* // => true
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*
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* _.isError(Error);
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* // => false
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*/
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function isError(value) {
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return isObjectLike(value) &&
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typeof value.message == 'string' && objectToString.call(value) == errorTag;
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}
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module.exports = isError;
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