es-iife

es-iife
=======


Transform ES module into a simple IIFE.

Features
--------

* import statements are resolved to global variables.
* export statements are exported as a global variable.

There are more samples under test/cases folder.

Usage
-----

``js
const {parse} = require("acorn");
const {transform} = require("es-iife");
const code =
import foo from "./foo.js";
const main = (value) => return foo(value);
export default main;
;
const result = transform({
code,
parse,
name: "doFoo",
resolveGlobal: (name) => {
if (name === "./foo.js") {
return "FOO";
}
}
})
console.log(result.code);
/* ->
var doFoo = (function () {

const main = (value) => return FOO(value);

return main;
})();
*/
`

API reference
-------------

This module exports following members.

* transform: A function which can convert ES module synax into an IIFE.



$3



`js
transform({
code: String,
parse?: Function,
ast?: Object,
sourcemap?: Boolean = false,
strict?: Boolean = false,

resolveGlobal?: (importPath: String) => globalVariableName: String,
name?: String
}) => {code: String, map?: SourceMap}
`

Arguments:

* code - the JavaScript source code that would be transformed.
* parse - a parser function which can parse JavaScript code into ESTree.
* ast - AST object. If undefined then use parse(code).
* sourcemap - if true then generate the sourcemap.
* strict - add use strict directive.
* resolveGlobal - a function receiving an import path and return a global variable name.
* name - The variable name that exports will be assigned to.

Returns:

* code - the code after transformed.
* map - The source map object generated by magicString.generateMap. If sourcemap is false then the map is null.

Changelog
---------

* 0.2.2 (Feb 18, 2021)

- Add: strict option.

* 0.2.1 (Oct 29, 2020)

- Fix: object shorthand issue.
- Bump dependencies. Fix for-loop issue.

* 0.2.0 (Aug 14, 2019)

- Change: define default export with var`.

* 0.1.1 (Aug 28, 2018)

- Fix: export from statements.

* 0.1.0 (Aug 28, 2018)

- Initial release.