Hi Özgür,
Welcome to this forum!
When I paste the javascript code of your .html file in jshint.com, then you see this:
So when I follow the directions on the right pane, you should need to change it to this:
var newConfigJSON = {
PORT_COUNT: $("#node-input-portCount").val(),
LATCH_PIN: $("#node-input-latchPin").val(),
LATCH_DELAY: $("#node-input-latchDelay").val(),
SPEED: $("#node-input-speed").val(),
LOOP_DELAY_US: $("#node-input-loopDelayUs").val() }
node.log("testtttt");
Then the syntax errors are solved.
Bart