When inputting a 4-digit number (e.g. 1234) in my text field with value format 00.00, I want it to automatically adjust to the 12.34 format. How can I achieve this behavior using JavaScript on keyup event?
When inputting a 4-digit number (e.g. 1234) in my text field with value format 00.00, I want it to automatically adjust to the 12.34 format. How can I achieve this behavior using JavaScript on keyup event?
Check out this code snippet:
<script>
function roundNumber(myString){
//alert(mystring);
myString=myString.replace(/\./g,'');
myString = myString.substring(0, 4);
var myString1 = myString.substring(0, 2);
var myString2 = myString.substring(2, 4);
myString2=""+myString1+"."+myString2+"";
//alert(myString2);
if(myString!="" && myString.length > 2){
document.getElementById("round_no").value=myString2;
}
}
</script>
<input type="text" id="round_no" value="" maxlength="5" onkeyup="roundNumber(this.value)">
Consider Using Regular Expressions:
$(function() {
$('input[type=text].two').on('input propertychange', function(e) {
this.value = this.value.replace(/\D/g, '').replace(/(\d{2})(\d*)/, '$1.$2');
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type="text" autofocus='' class='two' />
<input type="text" class='two' />Using .replace(/\D/g, '') will only leave digits in the value and
.replace(/(\d{2})(\d*)/, '$1.$2')It doesn't function that way. When the format is 00.00, it will result in 1234.00
this issue has been addressed previously in a different discussion: How to format numbers with commas as thousands separators in JavaScript
// currently based on the solution provided in the above reference: replace (\d{3}) with 2,
however, it would be beneficial to understand the specific objective behind this formatting requirement, in order to provide a comprehensive and accurate response. For more insights, please refer to the link shared above.
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