adding a script with type=”module” to woocommerce admin area


I’m trying to connect a my brother QL-800 label printer to a woocommerce webshop admin page

open order, click address, print it.

brother provides a javascript library (b-pac: ) for that, which works in the sample page, but now i want to add it to the woocommerce page.

it is a minified .js with an export, and a html with <script type="module"> import * as bpac from './bpac.js'; //....

i thought it would be easiest to get a “add js plugin” for wordpress and just copy the script (from html) into footer js, and “add as external javascript” the minified bpac.js

but i’m getting Uncaught SyntaxError: Cannot use import statement outside a module and Uncaught SyntaxError: Unexpected token 'export'

then i thought okayyyy, maybe it helps to transpile it, so i got a commonjs online transpiler and put the result as an “external javascript” instead of the original bpac.js.
this yields bpac-cjs.js?ver=1.8.1:3 Uncaught ReferenceError: exports is not defined

i don’t really understand the whole thing, and i’m not really used to wordpress, so if anyone could help me real quick, that would be really nice!

if you need any additional information, feel free to ask!

this is the <head> of the original sample.html

(gets form input and sends it to the printing api, easy stuff)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="" >
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>b-PAC 3.2 Javascript Sample for Extensions</title>

    <script type="module">
    import * as bpac from './bpac.js';
    const DATA_FOLDER = "C:Program FilesBrother bPAC3 SDKTemplates";
    //const DATA_FOLDER = "http://localhost/";
    //   Function name   :   DoPrint
    //   Description     :   Print, Preview Module
    window.DoPrint = async function DoPrint(strExport)
        if(bpac.IsExtensionInstalled() == false)
            const agent = window.navigator.userAgent.toLowerCase();
            const ischrome = (agent.indexOf('chrome') !== -1) && (agent.indexOf('edge') === -1)  && (agent.indexOf('opr') === -1)
      '', '_blank');

            const theForm = document.getElementById("myForm");
            const nItem = theForm.cmbTemplate.selectedIndex;
            const strPath = DATA_FOLDER + theForm.cmbTemplate.options[nItem].value;

            const objDoc = bpac.IDocument;
            const ret = await objDoc.Open(strPath);
            if(ret == true)
                const objName = await objDoc.GetObject("objName");
                objName.Text = name;
                objName.Text = street;
                objName.Text = city;

                theForm.txtWidth.value = await objDoc.Width;

                if(strExport == "")
                    objDoc.StartPrint("", 0);
                    objDoc.PrintOut(1, 0);
                    const image = await objDoc.GetImageData(4, 0, 100);
                    const img = document.getElementById("previewArea");
                    img.src = image;


This is the bpac.js library

Don’t know how much use this one is for oyu guys, or if it’s important to solve the problem..?

// .... abbreviated because of char limit in posts.. probably nothing very important here anyway. if you want me to post the whole thing, please let me know. this right here is the END of the file

i(t):n(f.detail.ret)};document.addEventListener(u,r)});return n.appendMessage(f),e}static Export(i,r,u){const f="IDocument::Export",e={method:f,type:i,filePath:r,dpi:u},o=new Promise((n,i)=>{const r=u=>{document.removeEventListener(f,r),u.detail.connect==!1?i(t):n(u.detail.ret)};document.addEventListener(f,r)});return n.appendMessage(e),o}static Close(){const i="IDocument::Close",r={method:i},u=new Promise((n,r)=>{const u=f=>{document.removeEventListener(i,u),f.detail.connect==!1?r(t):n(f.detail.ret)};document.addEventListener(i,u)});return n.appendMessage(r),u}}export const IsExtensionInstalled=()=>document.body.classList.contains("bpac-extension-installed")?!0:!1

how would i add this simple thing to my woocommerce admin page? how can i write to the <head> OR include <script>s as “module” OR get that es6 import/export syntax to work with my page?
i just can’t quite grasp it.

, , devman 1 year 0 Answers 138 views 0

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