Demo: read URL parameter using JavaScript

function ggbOnInit() { const queryString = window.location.search; const urlParams = new URLSearchParams(queryString); const command = urlParams.get("command"); alert(command) ggbApplet.evalCommand('text = "' + command + '"'); commands = command.split(";"); for (var i = 0; i < commands.length; i++) { try { ggbApplet.evalCommand(commands[i]); } catch (e) { console.log(e, command); } } }