Static Logger for Js project (Angular, Mithriljs etc...) with color and debug level in environment properties (browser console output)

readme.md

Init Logger in main.ts

Logger.init('WARN');

And use-it :)

Logger.d("Let's Go");
Logger.i("Let's Go",myObject);
Logger.w("Let's Go",true);
Logger.e("Let's Go");
Logger.table(["one","two","three"]);

logger.ts

enum LEVEL {
    DEBUG = 1, INFO = 2, WARN = 3, ERROR = 99, SUCCESS = 100
}

export class Logger {
    private static _level: LEVEL = LEVEL.DEBUG;

    public static init(level: string = "DEBUG"): void {
        console.log("Initialisation Logger");
        Logger._level = LEVEL[level];
        if (!Logger._level) {
            console.error(level + " is an invalid Log Level,Replace it in environment file by DEBUG,INFO,WARN or ERROR");
        }
    }
    public static d(...objects: any[]): void {
        if (Logger.showTrace(LEVEL.DEBUG)) {
            Logger.output(LEVEL.DEBUG, objects);
        }
    }

    public static i(...objects: any[]): void {
        if (Logger.showTrace(LEVEL.INFO)) {
            Logger.output(LEVEL.INFO, objects);
        }
    }

    public static w(...objects: any[]): void {
        if (Logger.showTrace(LEVEL.WARN)) {
            Logger.output(LEVEL.WARN, objects);
        }
    }

    public static e(...objects: any[]): void {
        Logger.output(LEVEL.ERROR, objects);
    }

    public static success(...objects: any[]): void {
        Logger.output(LEVEL.SUCCESS, objects);
    }

    public static table(objects: any): void {
        console.table(objects);
    }

    private static showTrace(level: LEVEL): boolean {
        return this._level <= level
    }

    private static output(level: LEVEL, ...objects: any[]): void {
        if (String(objects[0][0]) !== "[object Object]") {
            let message = String(objects[0][0]);
            objects[0].shift();
            Logger.outputWithObjects(level, message, objects[0]);
        } else { // default
            console.log("default");
            switch (level) {
                case LEVEL.INFO:
                    console.info(objects);
                    break;
                case LEVEL.WARN:
                    console.warn(objects);
                    break;
                case LEVEL.ERROR:
                    console.error(objects);
                    break;
                case LEVEL.DEBUG:
                default:
                    console.debug(objects);
                    break;
            }
        }
    }
    private static outputWithObjects(level: LEVEL, message: string, ...objects: any[]): void {
        switch (level) {
            case LEVEL.INFO:
                if (objects[0].length > 0)
                    console.log("%c[INFO] " + message + "\t", 'background: #FF0; color: #000', objects[0]);
                else
                    console.log("%c[INFO] " + message + "\t", 'background: #FF0; color: #000');
                break;
            case LEVEL.WARN:
                if (objects[0].length > 0)
                    console.log("%c[WARN] " + message + "\t", 'background: #FA0; color: #000', objects[0]);
                else
                    console.log("%c[WARN] " + message + "\t", 'background: #FA0; color: #000');
                break;
            case LEVEL.ERROR:
                if (objects[0].length > 0)
                    console.log("%c[ERROR] " + message + "\t", 'background: #F00; color: #FFF', objects[0]);
                else
                    console.log("%c[ERROR] " + message + "\t", 'background: #F00; color: #FFF');
                break;
            case LEVEL.SUCCESS:
                if (objects[0].length > 0)
                    console.log("%c[SUCCESS] " + message + "\t", 'background: #bada55; color: #000', objects[0]);
                else
                    console.log("%c[SUCCESS] " + message + "\t", 'background: #bada55; color: #000');
                break;

            case LEVEL.DEBUG:
            default:
                if (objects[0].length > 0)
                    console.log("[DEBUG] " + message + "\t", objects[0]);
                else
                    console.log("[DEBUG] " + message + "\t");
                break;
        }

    }
}