您曾在定义为 TO_NUMBER 通话数字被污染的东西了。我做了一个更新的小提琴，消除非数字字符，要么更新目标或通知用户（根据文档页面）的 http://jsfiddle.net/4r1nv1ft/2/

You had a call to to_number in the definition of numeric that was fouling things up. I've made an updated fiddle that removes non-digits and either updates the target or notifies subscribers (as per the documentation page): http://jsfiddle.net/4r1nv1ft/2/