How to read jquery? how to pronounce?

Before heading to the world of jQuery, let’s first understand how jQuery should be pronounced.

The common pronunciation is "Dj-ery" or "Dj-query", but the official introduction of the tool gives the pronunciation as "jei-kwər-ee" or "juh-kwɛri".

No matter how we pronounce it, jQuery has become a very popular JavaScript library in the field of front-end development. It provides a simple and easy-to-use API, making JavaScript programming easier and making web pages more beautiful and interactive. More fluid.

Let’s learn more about jQuery in detail.

1. What is jQuery?

jQuery is a JavaScript library. Its main function is to simplify HTML document traversal, event processing, animation design and rapid development of Ajax programs. jQuery is of far-reaching significance. Its main contribution is to simplify the operation of JavaScript to the extreme and reduce repetitive and redundant code.

Using jQuery can improve the execution efficiency of the program and greatly increase the speed of writing code. Compared with native JavaScript, jQuery allows you to focus more on business logic and page interaction, instead of basic and repetitive work such as how to operate DOM nodes and event binding.

2. Advantages of jQuery

1. Compatibility: jQuery code is easily compatible with existing web browsers. jQuery provides a rich API for JavaScript, ensuring the stability of the effect.
2. Lightweight: jQuery is very lightweight, with a file size of only tens of KB. At the same time, jQuery also supports CDN (content distribution network) to provide faster loading speed.
3. Good documentation support: jQuery has very rich online documentation and community support.
4. Simplify DOM operations: jQuery's selector is very flexible, allowing programmers to quickly and easily select the elements that need to be processed. At the same time, it also simplifies the creation and modification operations of DOM nodes, making the code easier to read and write.
5. Powerful animation effects: jQuery has rich animation effects and operation APIs, making the interaction effect of the page more excellent and smooth.

3. The use of jQuery

1. Introducing the jQuery library

We can introduce jQuery in the following ways:

Introduce the file at the head of the html file

Use CDN reference in the head tag
< ;script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js">

2. Execute jQuery syntax

jQuery is a JavaScript library, therefore, we add jQuery syntax in JavaScript files. The simplest jQuery code is as follows:

$(document).ready(function(){
//Code
});

This function declares a document.ready The callback function will be executed when the html page is completely loaded.

3. Selector

When using jQuery, we can use selectors to select elements to perform related operations. There are some commonly used selectors in jQuery:

1. ID selector: used to select elements with a specified id, using "#" to represent: $("#id").
2. Class selector: used to select elements with specified class names, using "." to represent: $(".class").
3. Tag selector: used to select elements with specified names, such as selecting all div elements $("div").
4. Attribute selector: used to select elements based on their attributes: $("[attributeName='value']").
5. AJAX Operation

Since jQuery is specifically designed for Ajax, it is very easy to develop Ajax applications using it. jQuery provides many Ajax-related APIs, including load(), get(), post(), ajax() and other methods.

Among them, the most commonly used is the $.ajax() method, which can be used to implement specific requests and receive responses. Compared with native JavaScript code, this method has the advantage of smaller code size and better readability.

$.ajax({

url: '****',
method: 'POST',
data: {
    a: 'test',
    b: 'test2'
},
dataType: 'json',
success: function(result){
    console.log(result);
}

});

The above code sends a POST request through the jQuery API and passes the data in JSON format. After the data result is returned, it will be automatically parsed into a JavaScript object and output to the console in the success callback function.

In short, jQuery is a professional dynamic website development code library that can greatly simplify the writing of JavaScript code, making front-end development easier. Whether it is simplifying DOM operations or implementing Ajax operations, jQuery can exert its unique advantages and become an indispensable tool for front-end developers.

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