process.hasUncaughtExceptionCaptureCallback()方法是流程模塊的內置應用程序編程接口，用於獲取是否已使用process.setUncaughtExceptionCaptureCallback()方法設置回調。
用法:
process.hasUncaughtExceptionCaptureCallback()
參數：此方法不接受任何參數。
返回值：它返回一個布爾值，該布爾值指定是否已使用process.setUncaughtExceptionCaptureCallback()設置了回調。
以下示例說明了Node.js中process.hasUncaughtExceptionCaptureCallback()方法的使用：
範例1：
// Node.js program to demonstrate the
// process.hasUncaughtExceptionCaptureCallback() Method
// Include process module
const process = require('process');
console.log(process.hasUncaughtExceptionCaptureCallback());
// Printing whether a callack 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");
}輸出：
false No callback has been set using process.setUncaughtExceptionCaptureCallback() method
範例2：
// 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 callack 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");
}輸出：
true A callback has been set using process.setUncaughtExceptionCaptureCallback() method
注意：上麵的程序將通過使用node filename.js命令。
參考： https://nodejs.org/api/process.html#process_process_hasuncaughtexceptioncapturecallback
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注：本文由純淨天空篩選整理自anwesha0107大神的英文原創作品 Node.js | process.hasUncaughtExceptionCaptureCallback() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。