Package Exports

gulp-iife

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Readme

gulp-iife

A Gulp plugin for wrapping JavaScript code within immediately invoked function expressions (IIFEs).

Install

$ npm install --save-dev gulp-iife

Usage

var gulp = require("gulp");
var iife = require("gulp-iife");

gulp.task("default", function() {
    return gulp.src("src/input.js")
        .pipe(iife())
        .pipe(gulp.dest("dist"));
});

Input file:

var greeting = "Hello, World!";
console.log(greeting);

Output file:

(function() {
"use strict";

var greeting = "Hello, World!";
console.log(greeting);
}());

Options

You can configure the following options:

useStrict: a boolean indicating whether to prepend a "use strict"; directive (true by default)
trimCode: a boolean indicating whether to remove leading & trailing whitespace from the code (true by default)

var gulp = require("gulp");
var iife = require("gulp-iife");

gulp.task("default", function() {
    return gulp.src("src/input.js")
        .pipe(iife({ useStrict: false, trimCode: false }))
        .pipe(gulp.dest("dist"));
});

Input file:

var greeting = "Hello, World!";
console.log(greeting);

Output file:

(function() {
var greeting = "Hello, World!";
console.log(greeting);

}());

Formatting

In the spirit of Gulp plugins, gulp-iife does one thing and one thing only: adding wrapping IIFEs.

If you'd like the resulting code to be neatly indented or otherwise formatted, pipe the output to another Gulp plugin which formats the JavaScript code, such as gulp-esformatter.