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Created April 5, 2020 22:22
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Form Validation Files
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<title>Form Validation</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Load Bootstrap's CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
</head>
<body>
<div class="container">
<h1>Form Validation</h1>
<p>
This form demonstrates many of the topics we have been discussing this
week, and allows us to experiment with validating and submitting a form.
</p>
<!-- Submit the form to /submit-form using a POST request -->
<form id="appointment-form" action="/submit-form" method="post">
<div class="row">
<div class="form-group col">
<label for="fname"><span class="text-danger">*</span> First Name</label>
<input
class="form-control"
id="fname"
name="fname"
autocomplete="given-name"
type="text"
autofocus
tabindex="1"
required
>
</div>
<div class="form-group col">
<label for="lname"><span class="text-danger">*</span> Last Name</label>
<input
class="form-control"
id="lname"
name="lname"
autocomplete="family-name"
type="text"
tabindex="2"
required
>
</div>
<div class="form-group col">
<label for="student-id"><span class="text-danger">*</span> Student ID</label>
<input
class="form-control"
id="student-id"
name="student-id"
type="text"
pattern="[0-9]{8,9}"
tabindex="3"
required
>
<div class="invalid-feedback">
Enter an 8 or 9 digit Student ID
</div>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="email"><span class="text-danger">*</span> Email Address</label>
<input
id="email"
class="form-control"
name="email"
autocomplete="email"
type="email"
tabindex="4"
required
>
</div>
<div class="form-group col">
<label for="phone">Phone Number</label>
<input
id="phone"
class="form-control"
name="phone"
autocomplete="tel"
type="tel"
tabindex="5"
>
<small class="form-text text-muted">Optional</small>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="address"><span class="text-danger">*</span> Street Address</label>
<input
id="address"
class="form-control"
name="address"
autocomplete="street-address"
type="text"
tabindex="6"
required
>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="city"><span class="text-danger">*</span> City</label>
<input
id="city"
class="form-control"
name="city"
autocomplete="address-level2"
type="text"
tabindex="7"
required
>
</div>
<div class="form-group col">
<label for="province"><span class="text-danger">*</span> Province</label>
<select
id="province"
class="form-control"
name="province"
autocomplete="address-level1"
tabindex="8"
>
<option>Alberta</option>
<option>British Columbia</option>
<option>Manitoba</option>
<option>New Brunswick</option>
<option>Newfoundland and Labrador</option>
<option>Northwest Territories</option>
<option>Nova Scotia</option>
<option>Nunavut</option>
<!-- Make Ontario the default selected option -->
<option selected>Ontario</option>
<option>Prince Edward Island</option>
<option>Quebec</option>
<option>Saskatchewan</option>
<option>Yukon</option>
</select>
</div>
<div class="form-group col">
<label for="postal-code"><span class="text-danger">*</span> Postal Code</label>
<input
id="postal-code"
class="form-control"
name="post-code"
autocomplete="postal-code"
type="text"
tabindex="9"
placeholder="M5W 1E6"
pattern="^[A-Za-z]\d[A-Za-z][ -]?\d[A-Za-z]\d$"
required
>
<div class="invalid-feedback">
Enter a valid Canadian Postal Code
</div>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="url">Website URL</label>
<input
id="url"
class="form-control"
name="url"
autocomplete="url"
type="url"
tabindex="10"
>
<small class="form-text text-muted">Optional</small>
<div class="invalid-feedback">
Enter a valid Seneca URL (using myseneca.ca or senecacollege.ca)
</div>
</div>
</div>
<div class="row">
<div class="form-group col">
<label class="mr-3"><span class="text-danger">*</span> Appointment Time:</label>
<div class="form-check form-check-inline">
<!-- Default to morning -->
<input class="form-check-input" type="radio" name="appointment-time" id="prefer-morning" value="morning" checked tabindex="11">
<label class="form-check-label" for="prefer-morning">Morning</label>
</div>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="appointment-time" id="prefer-afternoon" value="afternoon" tabindex="12">
<label class="form-check-label" for="prefer-afternoon">Afternoon</label>
</div>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="appointment-time" id="prefer-evening" value="evening" tabindex="13">
<label class="form-check-label" for="prefer-evening">Evening</label>
</div>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="feedback-file">Description</label>
<textarea
id="description"
class="form-control"
name="description"
rows="10"
tabindex="14"
></textarea>
</div>
</div>
<div class="d-flex flex-row-reverse mt-2">
<input class="btn btn-primary" type="submit" name="submit" value="Submit" tabindex="15">
<input class="btn btn-secondary mr-3" type="reset" name="reset" value="Reset" tabindex="16">
</div>
</form>
</div>
<!-- Include the necessary Bootstrap JavaScript files -->
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
<!-- Include our form validation script -->
<script>
function validateUrl(url) {
// We allow leaving the URL blank, so if this is the empty string, return true
if(!url) {
return true;
}
// Otherwise, try to parse the url and get its domain. Make sure it matches
// what we expect for a Seneca domain (myseneca.ca, senecacollege.ca). See:
// https://developer.mozilla.org/en-US/docs/Web/API/URL
try {
let parsedUrl = new URL(url);
let hostname = parsedUrl.hostname;
// Check for our domains
switch(hostname) {
case 'myseneca.ca':
case 'senecacollege.ca':
return true;
default:
console.log('URL is not an expected Seneca domain', url);
return false;
}
} catch(err) {
// Unable to parse this URL, invalid
console.log('Unable to parse URL', url);
return false;
}
}
window.onload = function() {
let form = document.querySelector('#appointment-form');
form.onsubmit = function(event) {
// First, check if the form is valid (e.g., not missing required fields).
// If it is missing anything, stop the submission now.
if(!form.checkValidity()) {
// Update the CSS to indicate any invalid fields
form.classList.add('was-validated');
// Stop the form from being submitted until things are filled out
event.preventDefault();
return false;
}
// Second, do a custom check on the URL, looking for Seneca domains
if(!validateUrl(form.url.value)) {
// Set the URL as invalid, and give a message for the reason
form.url.setCustomValidity('Please enter a Seneca URL');
// Listen for the user to make changes and keep re-validating
form.url.oninput = function(event) {
if (!validateUrl(form.url.value)) {
form.url.setCustomValidity('Please enter a Seneca URL');
} else {
// Clear the url so it is valid, and stop listening for updates
form.url.setCustomValidity('');
form.url.oninput = null;
}
};
// Stop the form from being submitted until the URL is fixed
event.preventDefault();
return false;
}
// Everything looks good, allow this form to be submitted
return true;
}
};
</script>
</body>
</html>
Raw
server.js
/**
* To run this web server:
*
* - Create a directory for your all your files
* - Copy server.js and index.html into this directory
* - Inside this directory, run `npm install express`
* - Run the web server: `node server`
*/
// We'll use the Express web framework for node.js, see https://expressjs.com/
const express = require('express');
// Create an instance of an Express Application
const app = express();
// Setup the form parsing we'll need to read submissions in requests
app.use(express.urlencoded())
// Our server will listen on port 8765 (e.g., http://localhost:8765)
const port = 8765;
// Allow a form to be submitted via a POST request to /submit-form
app.post('/submit-form', function handleFormPostRequest(req, res) {
// The form's name/value pairs are available in the body of the request.
// Log them to the console so we can see what was submitted
console.log('Received POST to /submit-form');
console.log(req.body);
// Let the user know we've received their form
res.send('Form Submitted Successfully via POST!');
});
// We'll serve index.html from the same directory as this file.
app.get('/', function serveIndexPage(req, res) {
res.sendFile(`${__dirname}/index.html`);
});
// Start our web server, and log a message when it's running and accepting requests.
app.listen(port, function() {
console.log(`Web server listening at http://localhost:${port}/`);
});
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