How to hide values ​​in jquery

JQuery is a very popular JavaScript library that provides features to simplify and optimize JavaScript programming, including the operation of hiding values. In this article, we will discuss the usage and methods of hidden values ​​in JQuery in more detail.

Hidden value is one of the common requirements in web development. It can be used to store and pass data, but it will not be displayed on the user interface. In traditional JavaScript programming, we can achieve this by using hidden fields or storing data in the page. However, JQuery provides more convenient and flexible ways to deal with hidden values. Here are some ways to hide values ​​using JQuery:

1. Using hidden fields (input type="hidden")

In HTML, you can use the input element to Set the type attribute to "hidden" to create a hidden field. For example:

In JQuery, you can use the .val() method To set or get the value of a hidden field, for example:

$("#my_hidden_field").val("new_value");

This will change the value of the my_hidden_field field to "new_value" . To get the value of a hidden field, you can use the following code:

var my_value = $("#my_hidden_field").val();

2. Use the HTML5 data attribute

HTML5 defines a custom attribute called "data-*" for all elements, which can be used to store element-specific data. For example:

In JQuery, you can use the .data() method to Set or get the data attribute of the element, for example:

$("#my_div").data("my-value", "new_value");

This will change the data of the my_div element -The value of the my-value attribute is changed to "new_value". To get the data attribute of an element, you can use the following code:

var my_value = $("#my_div").data("my-value");

3. Using JQuery Global Object

JQuery provides a global object that can be used to store data throughout the page. This is a very powerful option as it allows data to be shared between different pages and scripts. For example:

$.my_global_data = "my_value";

In JQuery, you can use global objects to store and get values, for example:

$.my_global_data = "new_value ";
var my_value = $.my_global_data;

This will change the value of the global object $.my_global_data to "new_value". To get the value of the global object, you can use the following code:

var my_value = $.my_global_data;

4. Using cookies

Cookie is a A small file stored in a web browser that can be used to store data between different pages and sessions. In JQuery, you can use the third-party plug-in jquery-cookie to manipulate cookies. For example:

$.cookie("my_cookie", "my_value");

This will create a cookie named "my_cookie" with a value of "my_value". To get the value of the cookie, you can use the following code:

var my_value = $.cookie("my_cookie");

5. Using LocalStorage and SessionStorage

LocalStorage and SessionStorage are two new web storage methods defined in HTML5. They allow permanent and temporary storage of data in the browser. LocalStorage is persistent, meaning the data remains after the user closes the browser. SessionStorage is temporary, meaning the data will be deleted when the user closes the browser. In JQuery, these web storage objects can be accessed by using the global object window. For example:

// Store data to LocalStorage
window.localStorage.setItem("my_key", "my_value");

// Get data from LocalStorage
var my_value = window.localStorage.getItem("my_key");

// Store data to SessionStorage
window.sessionStorage.setItem("my_key", "my_value");

// From SessionStorage gets data
var my_value = window.sessionStorage.getItem("my_key");

Summary

JQuery provides a variety of methods to handle hidden values, including hidden fields, HTML5 data attributes, JQuery global objects, cookies and web storage methods. The preferred approach depends on the specific needs and circumstances. Choosing the appropriate JQuery hidden value method can improve the readability and maintainability of the code, providing more flexible and convenient solutions for web developers.

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