in a html code like this
---------------------------
Temperature Converter
Temperature Converter
Convert from Fahrenheit to Celsius
Enter Fahrenheit temperature
------
1.js
var arr1 = [];
function validate(evt) {
var theEvent = evt || window.event;
if (theEvent.type === 'paste')
{
key = event.clipboardData.getData('text/plain');
}
else {
var key = theEvent.keyCode || theEvent.which;
key = String.fromCharCode(key);
console.log(evt.target.value);
}
var regex = /^[+-]?[0-9.]{1,9}(?:\.[0-9]{1,2})?$/
if(theEvent.keyCode==45 && evt.target.value=="")
{return true;}
else{
if( !regex.test(key) )
{
theEvent.returnValue = false;
if(theEvent.preventDefault) theEvent.preventDefault();
}
}
}
function convertToC() {
let fValue = document.getElementById("fInputValue").value;
if(-9999<=fvalue &&=""><>
{
let cTemp = ((fValue - 32) / 1.8).toFixed(2);
document.getElementById("resultCValue").innerHTML = `= ${cTemp} C`;
document.getElementById("resultCValue").style.color='white';
loadArrayData(cTemp, fValue);
}
else{
document.getElementById("resultCValue").innerHTML = "Value should be between -9999 to 9999";
document.getElementById("resultCValue").style.color='red';
}
}
function loadArrayData(data, anotherData)
{
var oldValue = document.getElementById("dataHistory").innerHTML;
if((data != '' || data != null) && (anotherData != '' || anotherData != null))
{
arr1.push({
Celsius:data,
Fahrenheit:anotherData
});
}
for(i=0;i<>
{
document.getElementById("dataHistory").innerHTML = oldValue+"
"+arr1[i].Fahrenheit+ " " +arr1[i].Celsius+"\t";
}
document.getElementById("resultLine").innerHTML = "\t=============\n"
}
function calcAverage() {
const avgCel = (arr1.reduce((t,b) => {
return t + +b.Celsius
}, 0) / arr1.length).toFixed(2);
const avgFahr = (arr1.reduce((t,b) => {
return t + +b.Fahrenheit
}, 0) / arr1.length).toFixed(2);
var oldValue = document.getElementById("totalAverage").innerHTML;
document.getElementById("totalAverage").innerHTML = avgFahr+" "+avgCel ;
}
function clearHistory()
{
arr1 = [];
document.getElementById("resultData").innerHTML = '';
document.getElementById("fInputValue").value = '';
document.getElementById("resultCValue").innerHTML = '';
}
-------------------
how could i make the submit ,average and reset button all disable until i enter a number between -9999 to 9999 ?