Import IIFE Scripts

[l-cornelius-dol]

How can I go about importing an IIFE script for use in a deno program?

We have a library of JS that currently must target ES3 because a production product uses a tool with an older JS engine, and this is non-negotiable. But I need to be able to use this library in deno, and I can't convert it to ES modules. The library is currently using function-closure modules, ala Crockford, where every source is a single constructor function like this:

function ModuleName() { 
...
}

and then the module is consumed with let mod=new ModuleName(); after being loaded in the browser with a <script> tag.

Is there any way I can use these in deno? I don't care how, exactly -- I can load the script and eval it if necessary, but it would be nice to just use some form of import.

Any suggestions would be appreciated.

[l-cornelius-dol]

The key was to wrap the source file with Function(return (+ ... +);)() to get a reference to the module constructor function, which can then be constructed. I'm open to better ideas, but this works for my case.

function createModule(pthORurl, ...args) {
    try {
        let mod = Function("return ("+Deno.readTextFileSync(pthORurl)+");")();
        if(typeof(mod)!=="function") { throw Error("Loaded module is type '"+typeof(mod)+"' not type 'function'"); }
        mod = new mod(...args);
        if(typeof(mod)!=="object") { throw Error("Loaded module is type '"+typeof(mod)+"' not type 'object'"); }
        return mod;
        }
    catch(err) { err.message += " (loading "+pthORurl+")"; throw err; }
    }