JavaScript form validation for uploading pdf file only:
Here is the js code used for validation:
<script>
document.getElementById("file").addEventListener('change', function(e){
let x = e.target.value
//console.log(x.substring(x.lastIndexOf('.') + 1));
console.log(x.split(".").at(-1))
if(x.split(".").at(-1)!='pdf'){
document.getElementById("msg").style.display="block";
document.getElementById("button").disabled = true;
}
else{
document.getElementById("msg").style.display="none";
document.getElementById("button").disabled = false;
}
})
function myFunc(){
alert("Hello "+document.getElementById("exampleInputEmail1").value+" !\n"+"submitted "+document.getElementById("file").value.split("\\").at(-1)+" successfully")
}