Please help to write a js regular expression.

1. Full number
2. Can be positive or negative.
3. Maximum 0.9999, minimum-0.9999
4. Only four decimal places are retained.
! ~ Thank you! I can"t fix it for a long time. Hey! > _

Mar.16,2021

re=/^\-?0+\.?\d{0,4}$/

/-0.d {0jue 4} /


/ ^\ -? 0 (?:\.\ d {1Magne4})? $/

/^\-?0(?:\.\d{1,4})?$/.test(-0.9999)  true
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