I am trying to validate a currency input field which allows only numeric values and dot(.)
dot is allowed but not as a first character. I came up with the below pattern, everything works fine except one scenario, where . is getting validated to true even if its first character.
validateInput(event) {
event.target.value = event.target.value.replace(/[^0-9.]/g, '').replace(/(\..*?)\..*/g, '$1').replace(/(\.\d{2}).+/g, '$1'))
}
How can i correct this so that . is not allowed as first character? Any help on this is much appreciated, TIA.
>Solution :
We can use the regex /^\.$/g validate the scenario for . and set it to blank, thus fixing the problem.
validateInput(event: any) {
event.target.value =event.target.value
.replace(/[^0-9.]/g, '')
// to handle dot scenario
.replace(/^\.$/g, '')
.replace(/(\..*?)\..*/g, '$1')
.replace(/(\.\d{2}).+/g, '$1');
}