Node.js process.hasUncaughtExceptionCaptureCallback() Method Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report The process.hasUncaughtExceptionCaptureCallback() method is an inbuilt application programming interface of the process module which is used to get whether a callback has been set using process.setUncaughtExceptionCaptureCallback() method. Syntax: process.hasUncaughtExceptionCaptureCallback() Parameters: This method does not accept any parameters.Return Value: It returns a boolean value specifying whether a callback has been set using process.setUncaughtExceptionCaptureCallback() or not. Below examples illustrate the use of process.hasUncaughtExceptionCaptureCallback() method in Node.js: Example 1: JavaScript // Node.js program to demonstrate the // process.hasUncaughtExceptionCaptureCallback() Method // Include process module const process = require('process'); console.log(process.hasUncaughtExceptionCaptureCallback()); // Printing whether a callback is set or not if(process.hasUncaughtExceptionCaptureCallback()) { console.log("A callback has been set using " + "process.setUncaughtExceptionCaptureCallback() method"); }else{ console.log("No callback has been set using " + "process.setUncaughtExceptionCaptureCallback() method"); } Output: false No callback has been set using process.setUncaughtExceptionCaptureCallback() method Example 2: JavaScript // Node.js program to demonstrate the // process.hasUncaughtExceptionCaptureCallback() Method // Include process module const process = require('process'); function to_be_called(ex){ console.log(ex); } // Setting callback process.setUncaughtExceptionCaptureCallback(to_be_called); console.log(process.hasUncaughtExceptionCaptureCallback()); // Printing whether a callback is set or not if(process.hasUncaughtExceptionCaptureCallback()){ console.log("A callback has been set using " + "process.setUncaughtExceptionCaptureCallback() method"); }else{ console.log("No callback has been set using " + "process.setUncaughtExceptionCaptureCallback() method"); } Output: true A callback has been set using process.setUncaughtExceptionCaptureCallback() method Note: The above program will compile and run by using the node filename.js command.Reference: https://nodejs.org/api/process.html#process_process_hasuncaughtexceptioncapturecallback Comment More infoAdvertise with us Next Article Node.js process.setegid() Method V vyer Follow Improve Article Tags : Web Technologies Node.js Node.js-process-module Similar Reads Node.js process.chdir() Method The process.chdir() method is an inbuilt application programming interface of the process module which is used to change the current working directory. 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