How to develop a simple task manager using MySQL and JavaScript

How to develop a simple task manager using MySQL and JavaScript

Overview:
Task manager is a common application that can help us Organize and track completion of daily tasks. In this article, we will learn how to develop a simple task manager using MySQL and JavaScript. The manager will have the ability to add, edit, and delete tasks, as well as display and search functions for task lists. We will use MySQL as the database to store task information, and JavaScript to implement the front-end user interface and interact with the database.

Preparation:

• Install the MySQL database.
• Create a database (such as task_manager), and create a task table (such as tasks), which will store task information, such as task name, deadline, priority, etc.

Development Task Manager:

1. Establishing a database connection
   In JavaScript, we need to use the MySQL connection library to establish a connection with the database. The sample code is as follows:

const mysql = require('mysql');
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password',
  database: 'task_manager'
});

connection.connect((err) => {
  if (err) throw err;
  console.log('Connected to MySQL database');
});

2. Add task
   We can add a task in the task manager. Obtain task-related information through front-end forms and insert it into the task table. The sample code is as follows:

function addTask(taskName, deadline, priority) {
  const task = { name: taskName, deadline: deadline, priority: priority };
  connection.query('INSERT INTO tasks SET ?', task, (err, res) => {
    if (err) throw err;
    console.log('Task added successfully');
  });
}

3. Edit Task
   We can edit existing tasks. Get the updated task information through the front-end form and update it to the task table. The sample code is as follows:

function editTask(taskId, updatedTask) {
  connection.query('UPDATE tasks SET ? WHERE id = ?', [updatedTask, taskId], (err, res) => {
    if (err) throw err;
    console.log('Task updated successfully');
  });
}

4. Delete task
   We can delete tasks from the task manager. The sample code is as follows:

function deleteTask(taskId) {
  connection.query('DELETE FROM tasks WHERE id = ?', taskId, (err, res) => {
    if (err) throw err;
    console.log('Task deleted successfully');
  });
}

5. Display task list
   We can get the task list from the database and display it on the front end. The sample code is as follows:

function displayTasks() {
  connection.query('SELECT * FROM tasks', (err, rows) => {
    if (err) throw err;
    console.log('Tasks:', rows);
  });
}

6. Search tasks
   We can search the task list based on keywords. The sample code is as follows:

function searchTasks(keyword) {
  connection.query('SELECT * FROM tasks WHERE name LIKE ?', "%" + keyword + "%", (err, rows) => {
    if (err) throw err;
    console.log('Search results:', rows);
  });
}

Summary:
By using MySQL and JavaScript to develop the task manager, we can add, edit, and delete tasks, and can display the task list and search on the front-end interface Task-specific functionality. The above is a simple code example. You can modify and extend the code according to your own needs to achieve more functions and a better user experience. I hope this article can help you get started quickly and understand how to develop a task manager using MySQL and JavaScript.

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