具有正则表达式问题的流星键盘事件

I'm trying to display properly formatted numbers in my autoForm input fields. The code below prints, as expected, to the console when I use a console.log statement. However, when returned to the client, 500000 displays 5,0,0,000 and .toLocaleString() doesn't work at all in the display or console. Any ideas?I'm trying to display properly formatted number