I am working with two input fields that represent hours and minutes separately.
<input type="number" min="0" max="24" step="1" value="00" class="hours">
<input type="number" min="0" max="0.60" step="0.01" value="00" class="minutes">This setup will normally display as:
0:0
Or:
5:3
Is there a way to format it to show:
00:00
Or:
05:03
I want it in the 24-hour time format, but constraints prevent me from using type="time".
To trigger a JavaScript function when the value of an input is changed, you can assign an onchange attribute to your input element.
<script>
function updateValue() {
var inputValue = document.getElementById("userInput").value;
if (inputValue.length < 3) {
inputValue = "00" + inputValue;
}
console.log(inputValue);
}
</script>
<input id="userInput" onchange="updateValue()"/>
function adjustNum(num){
if (num < 10){
return "0" + num;
}
}
var adjustedHours = adjustNum(hours);
var adjustedMinutes = adjustNum(minutes);
REMINDER: This technique employs type="text" so make sure to convert back to a numeric value as required. Number(adjustedHours);
Implement a JavaScript function to include a leading zero.
const hours = document.getElementById("hours");
const minutes = document.getElementById("minutes");
function addLeadingZero(value) {
return value.length < 2 ? "0" + value : value;
}
hours.addEventListener("input", function() {
hours.value = addLeadingZero(hours.value);
});
minutes.addEventListener("input", function() {
minutes.value = addLeadingZero(minutes.value);
});<input type="number" min="0" max="24" value="00" id="hours" class="hours">
<input type="number" min="0" max="59" value="00" id="minutes" class="minutes">The simplest things are often the most enjoyable
`${value}`.padStart(2, '0')
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