Tips for bringing in an npm package in JavaScript stimulus

Looking to utilize the imageToZ64() function within the zpl-image module.

After installing it with: npm install zpl-image

I attempted importing it using: 

import './../../../node_modules/zpl-image';

However, when trying to use the function like this let res = imageToZ64(canvas); I encountered an issue: Uncaught (in promise) ReferenceError: imageToZ64 is not defined

I also experimented with importing it in a different way: 

import { imageToZ64 } from  './../../../node_modules/zpl-image/zpl-image';

The problem arises because this function relies on other functions from pako.js, which is another JavaScript file within zpl-image. My question is, how can I import the module in a manner that grants me access to all functions?

javascriptnpm-install

Answer №1

I highly recommend checking out the README on the zpl-image repository on GitHub for more information.

If you want to use this with Node.js, you can simply do:

const imageToZ64 = require("zpl-image").imageToZ64;

Or:

const { imageToZ64, rgbaToZ64 } = require("zpl-image");

If you are looking to use it in the browser, please refer to the generic browser usage section. Additionally, if you have already installed it via npm, there is a demo file located at 

node_modules/zpl-image/zpl-image.html
. You can open this file in your browser, review its content, and gain a better understanding of how the code functions, as that is the purpose of the demo file.

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