AngularJS:在输入时如何显示“50000美元”没有集中但集中时显示“50000”?

I have a input to show a formatted number. Normally, when it has no focus, it should show a formmatted string, e.g. ',000.00'. But when it has focus, it should show the raw value, e.g. 50000 for editing.I have a input to show a formatted number. Norm