process.hasUncaughtExceptionCaptureCallback()方法是流程模块的内置应用程序编程接口，用于获取是否已使用process.setUncaughtExceptionCaptureCallback()方法设置回调。
用法:
process.hasUncaughtExceptionCaptureCallback()
参数：此方法不接受任何参数。
返回值：它返回一个布尔值，该布尔值指定是否已使用process.setUncaughtExceptionCaptureCallback()设置了回调。
以下示例说明了Node.js中process.hasUncaughtExceptionCaptureCallback()方法的使用：
范例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");
}输出：
false No callback has been set using process.setUncaughtExceptionCaptureCallback() method
范例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");
}输出：
true A callback has been set using process.setUncaughtExceptionCaptureCallback() method
注意：上面的程序将通过使用node filename.js命令。
参考： https://nodejs.org/api/process.html#process_process_hasuncaughtexceptioncapturecallback
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注：本文由纯净天空筛选整理自anwesha0107大神的英文原创作品 Node.js | process.hasUncaughtExceptionCaptureCallback() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。