regex 1-9999 for form validation

Question

I am trying to write some form validation, I need one of the inputs to be 1-9999. I know nothing about regular expressions ( never used them before) and here is my first attempt

/^([1-9][1-9]|[1-9]|[1-9]\d|9999)$/

Does not seem to want to work, can anyone help me? Thanks!

Solution 1

Try the below regex,

^(?:[1-9][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9])$

DEMO

Solution 2

This doesn't exclude zero, but /^\d{1,4}$/ should do the trick.

Solution 3

Try using this

^([1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9])$

Comments

[TaeKwonJoe]

This pattern works perfectly for my use case in Angular: <input type="number" class="form-control form-control-lg" name="play-time" [(ngModel)]="playTime" min="1" max="9999" minLength="1" maxlength="4" pattern="^([1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][‌​0-9])?$" digitOnly required />