_

[jdbgn]

/* nodenames.js */

var input_pins = [
'res',
'db0',
'db1',
'db3',
'db2',
'db5',
'db4',
'db7',
'db6',
'so',
'clk0',
'rdy',
'nmi',
'irq',
];

input_clock_pin = (nodenames['clk0']);
input_pins = (input_pins.map((function (e){return (nodenames[e]);})));

/* expertWires.js */

function isInputPin(nn)
{
    return ((input_pins != undefined)
        && (arrayContains(input_pins, nn)));
}
function handleClick(e)
{

/* line 519 */

    if ((e.altKey)
    &&  (isInputPin(w)))
    {
        if (w == input_clock_pin)
        {
            stepForward();
            return;
        }
        toggleNode(w);
        refresh();
        return;
    }

}

/* chipsim.js */

function toggleNode(nn)
{
    var node;
    node = nodes[nn];
    node.pullup = !(node.pullup);
    node.pulldown = !(node.pulldown);
    recalcNodeList([nn]);
}

[jeffythedragonslayer]

Welcome to GitHub. I think you accidentally deleted the name of this feature request. If you already have code to contribute, then please fork this repo and open a pull request against the upstream.