Frontend Development:
Frameworks and Libraries: Choose a JavaScript framework or library for frontend development. Popular choices include React.js, Angular, or Vue.js. Leverage libraries like jQuery for DOM manipulation if needed.
AJAX (Asynchronous JavaScript and XML): Understand AJAX for making asynchronous requests to the backend. Use Fetch API or XMLHttpRequest for handling data asynchronously.
User Interface (UI): Design a responsive and user-friendly UI for interacting with the database. Implement features such as forms, input validation, and user feedback.
State Management: If using a framework like React, understand state management concepts. Manage application state efficiently for a dynamic user experience.
Authentication and Authorization: Implement user authentication for secure access to the frontend. Handle user roles and permissions to control access to certain features.
Data Binding: Use two-way data binding for seamless interaction between the UI and backend data. Keep the UI synchronized with the database. Backend Development: Using JavaScript (Node.js) or Python:
Server-Side Frameworks: For JavaScript: Use Node.js with Express.js or another framework like Nest.js. For Python: Use Flask or Django for building the backend.
Database Integration: Connect to the database using an appropriate driver or ORM (Object-Relational Mapping). Execute CRUD (Create, Read, Update, Delete) operations on the database.
API Development: Design RESTful or GraphQL APIs for communication between frontend and backend. Implement endpoints for data retrieval, manipulation, and other functionalities.
Middleware: Use middleware to handle tasks like authentication, logging, and request parsing. Ensure middleware components are well-organized and modular.
Security: Implement security measures such as input validation and protection against common vulnerabilities (e.g., SQL injection, XSS). Set up HTTPS for secure data transmission.
Error Handling: Develop robust error handling mechanisms to gracefully handle errors and provide meaningful feedback to the frontend.
Authentication and Authorization: Implement user authentication and authorization on the backend. Secure sensitive endpoints and data.
Testing: Write unit tests and integration tests for backend functionalities. Ensure proper error handling and edge case testing.
Scalability: Design the backend with scalability in mind. Optimize database queries and use caching where applicable.
Documentation: Create comprehensive documentation for the backend API. Include details on endpoints, request/response formats, and authentication mechanisms.
General Considerations:
Communication: Ensure effective communication between frontend and backend teams (if separate). Use clear API documentation for smooth integration.
Version Control: Use version control systems like Git for tracking changes in code. Collaborate with a team using branching and merging strategies.
Deployment: Deploy the frontend and backend separately or together, depending on your architecture. Use tools like Docker for containerization and continuous integration for automated deployments.
/*
<table>
<tr>
<th><label for="name">Name</label></th>
<th><label for="email">Email</label></th>
<th><label for="password">Password</label></th>
<th><label for="phone">Phone</label></th>
</tr>
<tr>
<td><input type="text" name="name" id="name" required></td>
<td><input type="email" name="email" id="email" placeholder="abc@xyz.org" required></td>
<td><input type="password" name="password" id="password" required></td>
<td><input type="tel" name="phone_num" id="phone_num"
pattern="[0-9]{3}-[0-9]{3}-[0-9]{4}"
placeholder="999-999-9999"></td>
<td ><button onclick="create_User()">Create</button></td>
</tr>
</table>
*/
Table
Form
function create_User(){
// extract data from inputs
const name = document.getElementById("name").value;
const email = document.getElementById("email").value;
const password = document.getElementById("password").value;
const phone = document.getElementById("phone").value;
const requestOptions = {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer my-token',
},
};
//url for Create API
const url='/crud_api/create/' + name + '/' + email+ '/' + password + '/' + phone;
//Async fetch API call to the database to create a new user
fetch(url, requestOptions).then(response => {
// prepare HTML search result container for new output
const resultContainer = document.getElementById("result");
// trap error response from Web API
if (response.status !== 200) {
const errorMsg = 'Database response error: ' + response.status;
console.log(errorMsg);
// Email must be unique, no duplicates allowed
document.getElementById("pswError").innerHTML =
"Email already exists in the table";
return;
}
// response contains valid result
response.json().then(data => {
console.log(data);
//add a table row for the new/created userId
const tr = document.createElement("tr");
for (let key in data) {
if (key !== 'query') {
//create a DOM element for the data(cells) in table rows
const td = document.createElement("td");
console.log(data[key]);
//truncate the displayed password to length 20
if (key === 'password'){
td.innerHTML = data[key].substring(0,17)+"...";
}
else{
td.innerHTML = data[key];}
//add the DOM data element to the row
tr.appendChild(td);
}
}
//append the DOM row to the table
table.appendChild(tr);
})
})
}
/*
<table>
<thead>
<tr>
<th>Name</th>
<th>ID</th>
<th>Actions</th>
</tr>
</thead>
<tbody id="table">
<!-- javascript generated data -->
</tbody>
</table>
*/
// Static json, this can be used to test data prior to API and Model being ready
const json = '[{"_name": "Thomas Edison", "_uid": "toby"}, {"_name": "Nicholas Tesla", "_uid": "nick"}, {"_name": "John Mortensen", "_uid": "jm1021"}, {"_name": "Eli Whitney", "_uid": "eli"}, {"_name": "Hedy Lemarr", "_uid": "hedy"}]';
// Convert JSON string to JSON object
const data = JSON.parse(json);
// prepare HTML result container for new output
const table = document.getElementById("table");
data.forEach(user => {
// build a row for each user
const tr = document.createElement("tr");
// td's to build out each column of data
const name = document.createElement("td");
const id = document.createElement("td");
const action = document.createElement("td");
// add content from user data
name.innerHTML = user._name;
id.innerHTML = user._uid;
// add action for update button
var updateBtn = document.createElement('input');
updateBtn.type = "button";
updateBtn.className = "button";
updateBtn.value = "Update";
updateBtn.style = "margin-right:16px";
updateBtn.onclick = function () {
alert("Update: " + user._uid);
};
action.appendChild(updateBtn);
// add action for delete button
var deleteBtn = document.createElement('input');
deleteBtn.type = "button";
deleteBtn.className = "button";
deleteBtn.value = "Delete";
deleteBtn.style = "margin-right:16px"
deleteBtn.onclick = function () {
alert("Delete: " + user._uid);
};
action.appendChild(deleteBtn);
// add data to row
tr.appendChild(name);
tr.appendChild(id);
tr.appendChild(action);
// add row to table
table.appendChild(tr);
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>User Registration</title>
</head>
<body>
<h3>Table</h3>
<table id="userTable">
<tr>
<th><label for="name">Name</label></th>
<th><label for="email">Email</label></th>
<th><label for="password">Password</label></th>
<th><label for="phone">Phone</label></th>
</tr>
</table>
<script>
function createUser() {
// Get user inputs
var name = document.getElementById('name').value;
var email = document.getElementById('email').value;
var password = document.getElementById('password').value;
var phone = document.getElementById('phone_num').value;
// Create a new row in the table
var table = document.getElementById('userTable');
var newRow = table.insertRow(-1); // -1 inserts a new row at the last position
// Insert cells with user inputs
var cell1 = newRow.insertCell(0);
var cell2 = newRow.insertCell(1);
var cell3 = newRow.insertCell(2);
var cell4 = newRow.insertCell(3);
cell1.innerHTML = name;
cell2.innerHTML = email;
cell3.innerHTML = password;
cell4.innerHTML = phone;
// Clear input fields after creating a user
document.getElementById('name').value = '';
document.getElementById('email').value = '';
document.getElementById('password').value = '';
document.getElementById('phone_num').value = '';
}
</script>
<!-- Your input form -->
<table>
<tr>
<td><input type="text" name="name" id="name" required></td>
<td><input type="email" name="email" id="email" placeholder="abc@xyz.org" required></td>
<td><input type="password" name="password" id="password" required></td>
<td><input type="tel" name="phone_num" id="phone_num"
pattern="[0-9]{3}-[0-9]{3}-[0-9]{4}"
placeholder="999-999-9999"></td>
<td><button onclick="createUser()">Create</button></td>
</tr>
</table>
</body>
</html>
Running cells with '/usr/local/bin/python3.12' requires the ipykernel package.
Run the following command to install 'ipykernel' into the Python environment.
Command: '/usr/local/bin/python3.12 -m pip install ipykernel -U --user --force-reinstall'