How to get data in html

HTML cannot obtain data directly. Methods of obtaining data include using JavaScript to obtain data through HTML elements or sending AJAX requests. Use server-side scripting languages ​​to connect to databases or other data sources, or to call APIs.

How HTML gets data

Introduction
HTML itself does not have the ability to get data capabilities, it is simply a markup language used to define the structure and content of web pages. In order to obtain data, we need to resort to other technologies such as JavaScript, AJAX or server-side scripting languages.

Get data using JavaScript
JavaScript is a client-side scripting language that can run in the browser. We can use JavaScript to get data in the following ways:

• Get data from HTML elements: Use document.getElementById(), document.querySelector () and other methods, we can get the data in the HTML element.
• AJAX request via XMLHttpRequest object: AJAX (Asynchronous JavaScript and XML) allows us to communicate with the server without reloading the page. We can use the XMLHttpRequest object to send HTTP requests and receive response data.
• Use JavaScript frameworks: JavaScript frameworks such as jQuery provide convenient ways to handle AJAX requests and data manipulation.

Get data using server-side scripting languages
Server-side scripting languages, such as PHP, ASP.NET or Node.js, can be executed on the server. We can use server-side scripting languages ​​to connect to databases or other data sources to get data.

• Query directly from the database: We can use SQL (Structured Query Language) to connect directly to the database and execute queries to get the data.
• Use ORM (Object Relational Mapper): ORM allows us to interact with the database using object-based programming, which can simplify data access.
• Using API (Application Programming Interface): API allows us to interact with third-party applications or services and obtain data.

Additional Notes

• For simple data retrieval tasks, JavaScript's AJAX methods are usually the most convenient.
• For tasks that require processing large amounts of data or interacting with a database, a server-side scripting language may be a better choice.
• Understanding data security and privacy issues is critical and appropriate measures should be taken when obtaining and processing data.

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