How to remove global “use strict” added by babel

Question

I\'m using function form of \"use strict\" and don\'t want global form which Babel adds after transpilation. The problem is I\'m using some libraries that aren\'t using \"us

Answer 1

Personally, I use the gulp-iife plugin and I wrap IIFEs around all my files. I noticed that the babel plugin (using preset es2015) adds a global "use strict" as well. I run my post babel code through the iife stream plugin again so it nullifies what babel did.

gulp.task("build-js-source-dev", function () {
	return gulp.src(jsSourceGlob)
      .pipe(iife())
	  .pipe(plumber())
	  .pipe(babel({ presets: ["es2015"] }))// compile ES6 to ES5
	  .pipe(plumber.stop())
      .pipe(iife()) // because babel preset "es2015" adds a global "use strict"; which we dont want
      .pipe(concat(jsDistFile)) // concat to single file
	  .pipe(gulp.dest("public_dist"))
});