ES2015 Symbol With Babel -Tutorial Savvy

The ES2015 symbol is a immutable data type like Strings.
The Symbols are unique, unlike string type.
In this demo, “We will learn to use ES6 Symbol through coded example”.
For this demo we have create ES6BabelDemo project and looks like following screenshot:-

The gulp-babel can be installed using npm install gulp-babel command.The following screenshot shows the gulp-babel installation.

The babel-preset-es2015 can be installed using npm install babel-preset-es2015 –save-dev command.The following screenshot shows the terminal with preset installation.

The gulpfile.js contains the code for defining tasks that will transpile the futuristic JS code to currently supported code.The code content of gulpfile.js are as follows:-

var gulp = require('gulp'),
    babel = require('gulp-babel');
gulp.task('babel', function () {
    return gulp.src('src/**/*.js')
        .pipe(babel({presets: ['es2015']}))
        .pipe(gulp.dest('dist'));
});
gulp.task('babel:watch', function () {
    return gulp.watch('src/**/*.js',['babel'])
});
gulp.task('default',['babel','babel:watch'] );

The Symbol.for() method looks for the Global Symbol registry for given value and returns the matched symbol.If the symbol was not found it creates and returns a new Symbol.
The Symbol.keyFor() method retrieves a Symbol for the given key.
The src/example,js file contains the code for this demo.The content of src/example.js are as follows:-

var  symbol1 = Symbol("I am Symbol1");
console.log("symbol1: ",symbol1);
var symbol1Type = typeof symbol1;
console.log("symbol1Type: ",symbol1Type);

var  symbol2 = Symbol.for(24);
console.log("Key for symbol2: ",Symbol.keyFor(symbol2));
console.log("Symbol for key 24: ",Symbol.for(24));

The dist/example.js file contans the babelified code.The code content of dest/example.js file are as follows:-

"use strict";

function _typeof(obj) {
    return obj && typeof Symbol !== "undefined" && obj.constructor ===
        Symbol ? "symbol" : typeof obj;
}

var symbol1 = Symbol("I am Symbol1");
console.log("symbol1: ", symbol1);
var symbol1Type = typeof symbol1 === "undefined" ? "undefined" :
    _typeof(symbol1);
console.log("symbol1Type: ", symbol1Type);

var symbol2 = Symbol.for(24);
console.log("Key for symbol2: ", Symbol.keyFor(symbol2));
console.log("Symbol for key 24: ", Symbol.for(24));