Example analysis of converting es6 to es5 in gulp

Instance analysis of converting es6 to es5 in gulp

npm install --save-dev gulp-babel  babel-preset-es2015

var babel = require("gulp-babel");
// es6
gulp.task('es6', function() {
    return gulp.src('./wuqian/**/*.js')
        .pipe(babel())
        .pipe(gulp.dest('dist/'));
});

Create the file .babelrc in the project root path. The content is

{  "presets": ["es2015"]
}

gulp configuration is as follows:

var gulp = require("gulp");  
var babel = require("gulp-babel");  
  
gulp.task("default", function () {  
    return gulp.src("js**/*.js")// ES6 源码存放的路径  
        .pipe(babel({  
            presets: ['es2015']  
        }))  
        .pipe(gulp.dest("dist")); //转换成 ES5 存放的路径  
});

ES6 example:

let [foo, [[bar], baz]] = [1, [[2], 3]];  
console.log(foo);  
console.log(bar);  
console.log(baz);

Converted es5:

"use strict";  
  
var foo = 1,  
    bar = 2,  
    baz = 3;  
  
console.log(foo);  
console.log(bar);  
console.log(baz);

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