5分钟教你使用 console.log 管理你的输出日志

前言

在开发过程中，我们经常会使用 console.log 来输出一些信息，以便于我们调试。但是，当我们的项目越来越大，我们的 console.log 也会越来越多，这时候我们就需要对 console.log 进行管理，以便于我们更好的调试。

• 以埋点为例子，本地开发中，我们一般是通过打印埋点来看是否生效，这时候埋点日志可能跟其它日志混在一起，我们很难找到我们想要的日志，这时候我们就需要对埋点日志进行管理，以便于我们更好的调试。

logN.success("埋点", "page_click_report", {
    eventName: "page_click_report",
    params: {
        user_id: "linwu",
        age: "18",
        height: "171cm",
        sex: "male",
        wx: "linwu-hi"
    }
});

• 版本号信息

• 打印请求信息

有时候在混合H5开发的时候，接口并不是走XHR而是由客户端提供的JSBridge请求，这时候我们就要对log进行一些处理，以便于我们更好的调试。

Log函数

直接copy下面的代码到项目中，可以直接使用,童叟无欺啊亲

type Color = 'primary' | 'success' | 'info' | 'warning' | 'danger' | 'error';

const COLORS: Color[] = ['primary', 'success', 'info', 'warning', 'danger', 'error'];

const COLOR_MAP: Record<Color, string> = {
  primary: '#2d8cf0',
  success: '#19be6b',
  info: '#909399',
  warning: '#ff9900',
  danger: '#35495E',
  error:"#FF0000"
};

const getColor = (type: Color) => COLOR_MAP[type];

const createLog = <T extends any[]>(
  fn: (type: Color, ...args: T) => void
): Record<Color, (...args: T) => void> => {
  return COLORS.reduce((logs, type) => {
    logs[type] = (...args: T) => fn(type, ...args);
    return logs;
  }, {} as Record<Color, (...args: T) => void>);
};

const nsLog = (type: Color, ns: string, msg: string, ...args: any[]) => {
  const color = getColor(type);
  console.log(
    `%c ${ns} %c ${msg} %c ${args.length ? '%o' : ''}`,
    `background:${color};border:1px solid ${color}; padding: 1px; border-radius: 4px 0 0 4px; color: #fff;`,
    `border:1px solid ${color}; padding: 1px; border-radius: 0 4px 4px 0; color: ${color};`,
    'background:transparent',
    ...args
  );
};

export const logN = createLog(nsLog);

const sLog = (type: Color, msg: string, ...args: any[]) => {
  const color = getColor(type);
  console.log(
    `%c ${msg} ${args.length ? '%o' : ''}`,
    `color: ${color};`,
    ...args
  );
};

export const logS = createLog(sLog);

const bLog = (type: Color, msg: string, ...args: any[]) => {
  const color = getColor(type);
  console.log(
    `%c ${msg} ${args.length ? '%o' : ''}`,
    `background:${color}; padding: 2px; border-radius: 4px; color: #fff;`,
    ...args
  );
};

 export const logB = createLog(bLog);

示例

// Usage:
logS.primary("Primary message");
logN.success("接口", "https://api.juejin.cn/user_api/v1/user/get_info_pack",{
    "err_no": 0,
    "err_msg": "success",
    "data": {
        "user_basic": {
            "user_id": "3450719496318734",
            "user_name": "linwu",
            "company": "腾讯",
            "job_title": "高级前端开发工程师",
            "avatar_large": "https://p9-passport.byteacctimg.com/img/user-avatar/6c748ea6567c4afdd9f54dde04dbbfdf~300x300.image",
            "description": "☀高级前端开发工程师\r\n🌲就职于腾讯等多家互联网大厂\r\n📚《现代Javascript高级教程》、《现代Typescript高级教程》、《深入浅出Dart》作者",
            "favorable_author": 1,
            "builder": 0,
            "book_author": 0,
            "can_tag_cnt": 0,
            "is_select_annual": false,
            "select_annual_rank": 0,
            "annual_list_type": 0,
            "university": {
                "university_id": "0",
                "name": "",
                "logo": ""
            },
            "major": {
                "major_id": "0",
                "parent_id": "0",
                "name": ""
            },
            "student_status": 0,
            "study_point": 0,
            "identity": 0,
            "is_vip": false,
            "is_logout": 0,
            "become_author_days": 49
        },
        "user_counter": {
            "followee_count": 0,
            "follower_count": 620,
            "post_article_count": 110,
            "digg_article_count": 111,
            "got_digg_count": 2072,
            "got_view_count": 104959,
            "post_shortmsg_count": 3,
            "digg_shortmsg_count": 3,
            "select_study_event_count": 0,
            "select_online_course_count": 0,
            "collection_set_article_count": 29,
            "recommend_article_count_daily": 36,
            "got_article_collect_count_daily": 0
        },
        "user_growth_info": {
            "user_id": 3450719496318734,
            "jpower": 7711,
            "jscore": 813.2,
            "jpower_level": 5,
            "jscore_level": 5,
            "jscore_title": "先锋掘友",
            "author_achievement_list": [
                1
            ],
            "vip_level": 0,
            "vip_title": "",
            "jscore_next_level_score": 2000,
            "jscore_this_level_mini_score": 500,
            "vip_score": 0
        }
    }
});

logN.error("接口", "https://api.juejin.cn/user_api/v1/user/get_info_pack",{
    "err_no": 0,
    "err_msg": "fail",  
});


logB.info("VERSION v1.0.0");

小册

整理两本小册，一本是前端面试小册，一本是图解算法，阅读体验都很好,欢迎添加我微信linwu-hi获取