I have a form with HTML validations and I am using JS to add or remove error style.
<form action="" id="addForm">
<div>
<label for="name">Name</label>
<input type="text" id="name" name="name" required minlength="3" />
</div>
<button type="submit">Add</button>
</form>
window.onload = handleLoad;
function handleLoad() {
const form = document.forms.addForm;
const name = form.name;
name.onkeyup = function () {
if (name.checkValidity()) {
name.classList.remove("error");
} else {
name.classList.add("error");
}
};
}
In this case the error class gets applied as the user is typing in the field. Is there a way to prevent this?
You are using the onkeyup event, which means the event is triggered every time the user releases a key.
If you want to check the input field only when the user moves to the next field, you could use the onfocusout event.
name.onkeyup = function () {
if (name.checkValidity()) {
name.classList.remove("error");
} else {
name.classList.add("error");
}
}
P.S., If you have a small form, you could also implement validation when the submit button is clicked.