Australian number validation without 0 in angular

Question

I need to validate Australian number so it can only accept this formate

+61410029026

Currently what i have done

<div class="form-group login-input">
  <label for="mobilenumber " class="numberfixdigite">+61</label>
    <input type="text" oninput="this.value = this.value.replace(/[^0-9.]/g, '').replace(/(\..*?)\..*/g, '$1');" formControlName="phone_number" class="form-control" minlength="9" maxlength="12" name="phone" id="mobilenumber" placeholder="Phone number" required="" control-id="ControlID-4">
      <span style="color:red">Please enter mobile like 4xx 8xx 5xx</span>
        <div *ngIf="fh.check(g['phone_number'], f)" class="errors">
           <p *ngIf="g['phone_number'].errors">Mobile is required</p>
        </div>
 </div>

Answer 1

Try This

^((?:[1-9][0-9]*)(?:.[0-9]+)?)$

Answer 2

I would use this:

/^\+61[4,8,5]{1}[0-9]{7}$/

and before checking if regex matches, you could have a check if the user added the country code, if not, you could add it and then check the regex.