Function funcArg

src/js/net/Net.js:286–288

(context, arg, idx, payload)

    }

    function funcArg(context, arg, idx, payload) {
        return isFunction(arg) ? arg.call(context, idx, payload) : arg
    }

    function setAttribute(node, name, value) {
        value == null ? node.removeAttribute(name) : node.setAttribute(name, value)