[NPM] javascript-lp-solver

[rossdeacon1]

Hello I am struggling to use the javascript-lp-solver.

I have added the package to a collection using the NPM plugin.

However, when I try to reference it, it shows as empty.

Looking in the console, it seems to be importing the script, but the script ‘requires’ another script, which I think it cannot find. See the screenshot below, error on line 20, reading:

“Uncaught ReferenceError: require is not defined”

I’ve read online the browsers need an ‘import’ statement here instead?

Finally, in the documentation, there seems to be a way to do it via Node, Web and Webpack ( does weweb use webpack?) See documentation snippet below:

### Install:


(in Node)
npm install javascript-lp-solver --save

(in browser through CDN)
html
<script src="https://unpkg.com/javascript-lp-solver/prod/solver.js"></script>


(webpack)
javascript
const webpack = require('webpack'); //to access built-in plugins

module.exports = {
        "mode": "development",
        "plugins": [
            new webpack.IgnorePlugin(/(fs|child_process)/),
        ]
}

Im a bit lost on how to get this working and would love some help!

Thanks

[dorilama]

@dorilama

From a quick read of the github repo and some post from the team I would say that it works for libraries packed as umd that add an instance to the window and correctly instruct unpkg about what file to serve.
Many libraries will work and also many other will not because a lot of them don’t pack the final version in the required format or don’t declare the files correctly in the package.json.

this is a case where the library does bundle a umd version but not in the way unpkg expects it. You need to load the script (see the library docs) by yourself (there are a lot of ways to do it, I suggest using js actions in a workflow)

[raydeck]

You can make a custom javascript step to embed the script tag described in the readme with https://weweb-embed.statechange.ai/

You would add this line from the README into the textarea into the text box:

<script src="https://unpkg.com/javascript-lp-solver/prod/solver.js"></script>

[rossdeacon1]

Thanks, got it working!

[rossdeacon1]

Fantastic video Ray, really dumbed it down for me, exactly what I needed