JavaScript AggregateError object Last Updated : 07 Jun, 2022 Comments Improve Suggest changes Like Article Like Report The JavaScript AggregateError object is used to reflect the overall error of many single errors. This can be used when multiple errors need to be represented in the form of a combined error, for example, it can be thrown by Promise.any() when all the promises passed to it are rejected. Construction: The constructor AggregateError() is used to create a new object of AggregateError. Instance Properties: This object has two properties: message: We use the AggregateError.prototype.message to display the message of error. The default error message shown is " ".name: We use the AggregateError.prototype.name to display the name of error. The default error name shown is AggregateError. Example 1: This example shows the catching of an AggregateError. JavaScript <script> Promise.any([ Promise.reject( new Error( "There is any error occurred" ) ), ]).catch(n => { // Check if AggregateError console.log( n instanceof AggregateError ); // Print the message of the error console.log(n.message); // Print the name of the error console.log(n.name); // Print all the errors that this // error comprises console.log(n.errors); } );</script> Output: true All promises were rejected AggregateError [Error: There is any error occurred] Example 2: This example shows the creating of an AggregateError. JavaScript <script> try { throw new AggregateError([ new Error( "This is Error 1" ), new Error( "This is Error 2" ), new Error( "This is Error 3" ), ], 'These are multiple errors'); } catch (n) { // Check if AggregateError console.log( n instanceof AggregateError ); // Print the message of the error console.log(n.message); // Print the name of the error console.log(n.name); // Print all the errors that this // error comprises console.log(n.errors); } </script> Output: true These are multiple errors AggregateError [Error: This is Error 1, Error: This is Error 2, Error: This is Error 3] Comment More infoAdvertise with us Next Article JavaScript AggregateError object K krishnakripa Follow Improve Article Tags : JavaScript Java Quiz Web Technologies javascript-object Similar Reads Non-linear Components In electrical circuits, Non-linear Components are electronic devices that need an external power source to operate actively. 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