问在node.js中使用npm debug包登录时如何显示时间戳？

EN

$ DEBUG_COLORS=no DEBUG=* node ./dummy.js
Wed, 27 Feb 2019 12:29:12 GMT test Server started

'use strict';

const debug  = require('debug');
const logger = debug('test');

// wrap debug.formatArgs() implementation
const origFormatArgs = debug.formatArgs;
debug.formatArgs = function (args) { // requires access to "this"
    // example: prepend something to arguments[0]
    args[0] = `${new Date().toUTCString()} ${args[0]}`;

    // call original implementation
    origFormatArgs.call(this, args);
};

// override default debug.formatArgs() implementation
debug.formatArgs = function (args) { // requires access to "this"
    const name = this.namespace;
    const useColors = this.useColors;

    if (useColors) {
        // example: prepend something to arguments[0]
        args[0] = `${new Date().toUTCString()} ${name} ${args[0]}`;
    } else {
        // example: append something to arguments[0]
        args[0] = `${name} ${args[0]} ${new Date().toUTCString()}`;
    }
};

logger("Server started");