monitor-usage/es/index.js

a code monitoring tool based on Javascript, used to monitor and track target code usage in real time, collect code running log reports, etc.

import MonitorUsageClass from './core';
import { isInNodeEnv } from './utils';
function createMonitorUsage() {
    let instance;
    return () => {
        if (!instance)
            instance = new MonitorUsageClass();
        return instance;
    };
}
const MonitorUsage = createMonitorUsage();
export default MonitorUsage;
if (!isInNodeEnv() && process.env.NODE_ENV === 'production') {
    window.MonitorUsage = MonitorUsage;
}