ZPL printer / JS provider

Allow to print any raw data from JavaScript at any opened page directly to any .ZPL printer like Zebra Usage: Print barcode 1234567 window.postMessage( { type: "zpl", cmd: "print", printer: 'http://127.0.0.1:9100', raw: "^XA^FO50,50^B8N,100,Y,N^FD1234567^FS^XZ" }); Listen extension: window.addEventListener("message", function (event){ if (event.data && event.data.type && event.data.type == 'from_zpl_ext') { // receive version of extension if exists if (event.data.cmd === 'version') { ZPL_EXTENSION_VERSION = event.data.value; return; } // receive status of printing if (event.data.cmd === 'status') { console.log(event.data) return; } } }, false);