Universal Form Validator
One script to rule them all. Instead of writing custom checks for every form, use this generic validator loop to handle required fields automatically.
Copy the Script
<script>
function validateAll() {
var valid = true;
var errors = [];
// Check Inputs
var inputs = document.querySelectorAll(".required");
inputs.forEach(function(input) {
if (input.value.trim() === "") {
valid = false;
input.style.border = "1px solid red";
errors.push("Missing text fields");
} else {
input.style.border = "";
}
});
// Check Checkboxes
var checks = document.querySelectorAll(".required-check");
checks.forEach(function(box) {
if (!box.checked) {
valid = false;
errors.push("Please check required boxes");
}
});
if(!valid) alert("Errors: " + errors.join(", "));
return valid;
}
</script>
<form onsubmit="return validateAll()">
<input class="required">
<input type="checkbox" class="required-check">
<button>Send</button>
</form>Frequently Asked Questions
Add a specific class (like `validate`) to the input elements. The script finds all elements with that class and checks their value.
Yes. You can add a `data-pattern` attribute to inputs and have the script check the value against that Regex.
Yes. If `validate()` returns true, you can proceed to call your Ajax submission function instead of the default form submit.