What is not a jquery selector is

In front-end development, jQuery is a very popular JavaScript library. It provides a set of simple and powerful APIs that allow us to more conveniently operate the DOM, handle events, send AJAX requests, etc. When using jQuery, selectors are very important for obtaining elements, because they can quickly locate specific elements in the form of strings to perform subsequent operations.

As we all know, the jQuery selector is very simple to use. You can directly find elements through their tag names, class names, IDs, etc. However, what I want to discuss in this article are methods that are not jQuery selectors, although they may help you in some scenarios.

1. Use JavaScript native methods

Before the birth of jQuery, everyone’s DOM operations were completed using native JavaScript methods. At the same time, since the jQuery library itself is also written based on JavaScript, then we In some scenarios, you can give up using jQuery and use JavaScript native methods to manipulate the DOM.

For example, if we want to get the number of child elements of an element, we can use the native children attribute, and this attribute can be obtained in JavaScript in the following way:

let element = document.querySelector('#myDiv');
let childrenLength = element.children.length;

2. Use a library like jQuery

Although jQuery does provide many convenient methods, with the continuous development of front-end technology, the emergence of modern frameworks such as React and Vue has also brought a new experience to front-end development. .

In fact, modern frameworks such as React and Vue themselves also provide very powerful APIs for operating DOM. They also allow us to quickly locate elements and perform complex operations.

For example, in React, we can use a syntax similar to jQuery to get elements:

import React from 'react';
import ReactDOM from 'react-dom';

const element = <div>Hello World!</div>;
const container = document.getElementById('root');

ReactDOM.render(element, container);

// 类似 jQuery 的语法
const divElement = container.querySelector('div');
divElement.innerHTML = 'Hello React!';

Similarly, in Vue, we can also use a syntax similar to jQuery to get elements:

import Vue from 'vue';

const vm = new Vue({
  template: '<div>Hello World!</div>'
}).$mount('#app');

// 类似 jQuery 的语法
const divElement = vm.$el.querySelector('div');
divElement.innerHTML = 'Hello Vue!';

3. Use modern browser features

We all know that the emergence of jQuery is mainly to make up for the shortcomings of early browsers, allowing developers to achieve unified effects in various browsers . However, with the popularity of modern browsers and the gradual development of standards such as HTML5 and CSS3, we no longer need to use libraries like jQuery to process DOM, but can directly use the native API provided by the browser.

For example, in modern browsers, we can get elements through the following code:

const element = document.querySelector('#myDiv');
element.style.backgroundColor = 'red';

Here, we directly use the browser's native method, which can process the DOM very efficiently. It also avoids introducing additional libraries that lead to code redundancy.

4. Summary

In front-end development, we can use various methods to operate DOM, among which jQuery is one of the most popular selectors and provides a very convenient operation API. However, in some scenarios, we can not use jQuery, but can use JavaScript native methods, jQuery-like libraries, modern browser features, etc. These methods allow us to operate the DOM more efficiently, simplify the code, and thereby improve development efficiency.

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