iLog - Intelligent Logger that personalizes console.log, console.warn, console.error, and console.info

iLog.js

/**
 * iLog : intelligent logger.
 * Supports : .log(), .warn(), .error(), and .info()
 * Configuring :
 *     Change iLogCfg to your fit.
 *     Supports color changes and enable/disable stack trace for each of the log functions
 * Use : 
 *     console.ilog('my comment');
 *     -> my comment
 *     console.ilog(myVar1, myVar2, [more...]);
 *     -> [browser displays the objects]
 *     console.ilog('my header', 'my comment');
 *     -> my header: my comment
 *     console.ilog('my header', myVar1, myVar2, [more...]);
 *     -> my header: [browser displays the objects]
 *     console.ilog('my header', 'var1 = %o and var2 = %o', myVar1, myVar2);
 *     -> my header: var1 = [browser displays myVar1] and var2 = [browser displays myVar2]
 *     console.iwarn('my header', 'var1 = %o and var2 = %o', myVar1, myVar2);
 *     -> my header: var1 = [browser displays myVar1] and var2 = [browser displays myVar2]
 *     console.ierror('my header', 'var1 = %o and var2 = %o', myVar1, myVar2);
 *     -> my header: var1 = [browser displays myVar1] and var2 = [browser displays myVar2]
 *     console.iinfo('my header', 'var1 = %o and var2 = %o', myVar1, myVar2);
 *     -> my header: var1 = [browser displays myVar1] and var2 = [browser displays myVar2]
 */
const iLogCfg = {
    css: {
        header: 'color: #a6cd94',
        log: 'color: #d5d5d5',
        warn: 'color: #ffdc9e',
        error: 'color: #ff7f7f',
        info: 'color: #d5d5d5',
        defaultheader: 'color: #a6cd94',
        defaultlog: 'color: #d5d5d5',
        defaultwarn: 'color: #ffdc9e',
        defaulterror: 'color: #ff7f7f',
        defaultinfo: 'color: #d5d5d5',
    },
    stackTrace: {
        log: true,
        warn: true,
        error: true,
        info: true
    }
}
Object.defineProperty(iLogCfg, "css", {
    writable: false
});
Object.defineProperty(iLogCfg, "stackTrace", {
    writable: false
});
Object.defineProperty(iLogCfg.css, "defaultheader", {
    writable: false
});
Object.defineProperty(iLogCfg.css, "defaultlog", {
    writable: false
});
Object.defineProperty(iLogCfg.css, "defaultwarn", {
    writable: false
});
Object.defineProperty(iLogCfg.css, "defaulterror", {
    writable: false
});

console.ilog = function () {
    logType.apply(this, ['log'].concat(
        Array.prototype.slice.call(arguments)));
};
console.iwarn = function () {
    logType.apply(this, ['warn'].concat(
        Array.prototype.slice.call(arguments)));
};
console.ierror = function () {
    logType.apply(this, ['error'].concat(
        Array.prototype.slice.call(arguments)));
};
console.iinfo = function () {
    logType.apply(this, ['info'].concat(
        Array.prototype.slice.call(arguments)));
};

const logType = function (type, header, msg) {
    if (type !== 'log'
        && type !== 'warn'
        && type !== 'error'
        && type !== 'info') return;
    if (console[type]) {
        if (typeof header !== 'string'
            || arguments.length == 2) {
            console[type].apply(this, Array.prototype.slice.call(Array.prototype.slice.call(arguments, 1)));
            return;
        }
        let slicedArgs;
        if (typeof msg !== 'string') {
            // Not a message, so interpret as object
            slicedArgs = Array.prototype.slice.call(arguments, 2);
            msg = "";
        }
        else {
            slicedArgs = Array.prototype.slice.call(arguments, 3);
        }
        if (typeof msg !== 'string') return;
        let headerColor = (typeof iLogCfg.css.header === 'string') ?
            iLogCfg.css.header : iLogCfg.css.defaultheader;
        let msgColor = (typeof iLogCfg.css[type] === 'string') ?
            iLogCfg.css[type] : iLogCfg.css['default' + type];
        (console[type]).apply(this,
            [('%c' + header + ':%c ' + msg), headerColor, msgColor]
                .concat(Array.prototype.slice.call(slicedArgs))
            );
        if (iLogCfg.stackTrace[type] === true) {
            console.trace();
        }
    }
}