Question 251341 in Javascript Question posted in
A very good W3school tutorial can be found here.

only positive and negative numbers in javascript regrex with zero or one minus symbul

oninput="this.value = this.value.replace(/[^-0-9.]/g, '')

I use this code in my project, but input also can get more than 1 minus sign like this:

---23

I want my input have this conditions:

  1. only can get positive and negative numbers
  2. zero or one minus
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    .replace(/^(-)+|[^d.]/g, '$1')

    this is the right answer.


  2. 0

    You can adjust your regex to below

    EDIT.

    Based on your requirements:

    • positive or negative integers
    /^(-)?[0-9]*/g
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