time-to-botec

Benchmark sampling in different programming languages
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isError.js (961B)

      1 var baseGetTag = require('./_baseGetTag'),
      2     isObjectLike = require('./isObjectLike'),
      3     isPlainObject = require('./isPlainObject');
      4 
      5 /** `Object#toString` result references. */
      6 var domExcTag = '[object DOMException]',
      7     errorTag = '[object Error]';
      8 
      9 /**
     10  * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
     11  * `SyntaxError`, `TypeError`, or `URIError` object.
     12  *
     13  * @static
     14  * @memberOf _
     15  * @since 3.0.0
     16  * @category Lang
     17  * @param {*} value The value to check.
     18  * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
     19  * @example
     20  *
     21  * _.isError(new Error);
     22  * // => true
     23  *
     24  * _.isError(Error);
     25  * // => false
     26  */
     27 function isError(value) {
     28   if (!isObjectLike(value)) {
     29     return false;
     30   }
     31   var tag = baseGetTag(value);
     32   return tag == errorTag || tag == domExcTag ||
     33     (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
     34 }
     35 
     36 module.exports = isError;