MarseyWorld/files/assets/js/signup.js

document.getElementById('password-register').addEventListener('input', function () {

	var charCount = document.getElementById("password-register").value;
	var id = document.getElementById("passwordHelpRegister");
	var successID = document.getElementById("passwordHelpSuccess");

	if (charCount.length >= 8) {
		id.classList.add("d-none");
		successID.classList.remove("d-none");
	} else {
		id.classList.remove("d-none");
		successID.classList.add("d-none");
	}
});

document.getElementById('username-register').addEventListener('input', function () {

	const userName = document.getElementById("username-register").value;
	const id = document.getElementById("usernameHelpRegister");

	if (/[^a-zA-Z0-9_\-$]/.test(userName)) {
		id.innerHTML = '<span class="form-text font-weight-bold text-danger mt-1">No special characters or spaces allowed.</span>';
	} else {
		id.innerHTML = '<span class="form-text font-weight-bold text-success mt-1">Username is a-okay!</span>';

		if (userName.length < 3) {
			id.innerHTML = '<span class="form-text font-weight-bold text-muted mt-1">Username must be at least 3 characters long.</span>';
		} else if (userName.length > 25) {
			id.innerHTML = '<span class="form-text font-weight-bold text-danger mt-1">Username must be 25 characters or less.</span>';
		}
		else {
			fetch('/is_available/' + userName)
			.then(res => res.json())
			.then(json => {
				if (!json[userName]) {
					id.innerHTML = '<span class="form-text font-weight-bold text-danger mt-1">Username already taken :(</span>';
				}
			})
		}
	}
});