Strange behavior with input type="number"

[sinceow]

Version

2.3.4

Reproduction link

https://codepen.io/sinceow/pen/dRQaPW

Steps to reproduce

I want to build a input with 6 digital. The code above woks fine until I enter '0' more then 6 times.
'val' in Vue model is '000000', but the display is '00000000'

What is expected?

I think it's a bug

What is actually happening?

I don't know

[nickmessing]

@yyx990803, looks like this check is the reason, is this behaviour expected?

P.S. toNumber('03') === toNumber('3') another potential case.