示例:修补依赖项
重定向的依赖可以提供适合应用程序的衰减或修改功能。 例如,通过封装原始记录有关函数持续时间的计时数据:
const original = require('fn');
module.exports = function fn(...args) {
console.time();
try {
return new.target ?
Reflect.construct(original, args) :
Reflect.apply(original, this, args);
} finally {
console.timeEnd();
}
};
Redirected dependencies can provide attenuated or modified functionality as fits the application. For example, log data about timing of function durations by wrapping the original:
const original = require('fn');
module.exports = function fn(...args) {
console.time();
try {
return new.target ?
Reflect.construct(original, args) :
Reflect.apply(original, this, args);
} finally {
console.timeEnd();
}
};