Node.js process.throwDeprecation 属性
process.throwDeprecation 属性是 process 模块的内置应用程序编程接口,用于指示是否在当前 Node.js 进程上设置了 --throw-deprecation 标志。 process.throwDeprecation 是可变的,因此弃用警告是否导致错误可能会在运行时更改。
句法:
process.throwDeprecation
返回值:该属性表示是否在当前 Node.js 进程上设置了 --throw-deprecation 标志。
下面的示例说明了在 Node.js 中process.throwDeprecation 属性的使用:
示例 1:
Javascript
// Node.js program to demonstrate the
// process.throwDeprecation Property
// Include process module
const process = require('process');
// Printing process.throwDeprecation
// property value
console.log(process.throwDeprecation);
Javascript
// Node.js program to demonstrate the
// process.throwDeprecation Property
// Include process module
const process = require('process');
// Instance Properties
process.throwDeprecation = false;
// Printing process.throwDeprecation
// property value
console.log(process.throwDeprecation);
// Instance Properties
process.throwDeprecation = true;
// Printing process.throwDeprecation
// property value
console.log(process.throwDeprecation);
运行命令: node –throw-deprecation hello.js
输出 1:
true
运行命令: node hello.js
输出 2:
undefined
示例 2:
Javascript
// Node.js program to demonstrate the
// process.throwDeprecation Property
// Include process module
const process = require('process');
// Instance Properties
process.throwDeprecation = false;
// Printing process.throwDeprecation
// property value
console.log(process.throwDeprecation);
// Instance Properties
process.throwDeprecation = true;
// Printing process.throwDeprecation
// property value
console.log(process.throwDeprecation);
运行命令: node –throw-deprecation hello.js
输出 1:
true
true
运行命令: node hello.js
输出 2:
false
true
参考: https://nodejs.org/api/process.html#process_process_throwdeprecation