util.isError(object)
Stability: 0 - Deprecated
Returns true if the given "object" is an Error. Otherwise, returns false.
1 2 3 4 5 6 7 8 | const util = require('util');util.isError(new Error()) // trueutil.isError(new TypeError()) // trueutil.isError({ name: 'Error', message: 'an error occurred' }) // false |
Note that this method relies on Object.prototype.toString() behavior. It is possible to obtain an incorrect result when the object argument manipulates @@toStringTag.
1 2 3 4 5 6 7 8 9 | // This example requires the `--harmony-tostring` flagconst util = require('util');const obj = { name: 'Error', message: 'an error occurred' };util.isError(obj); // falseobj[Symbol.toStringTag] = 'Error';util.isError(obj); // true |
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