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JS code to realize three-level linkage of cities, provinces and municipalities across the country

Article Introduction：When laying out pages, three-level linkage drop-down lists are often used. As a front-end developer, can you use JS to write three-level linkage codes for provinces and cities? This article will share with you how to use JS to achieve the three-level linkage effect of cities across the country. It has certain reference value and interested friends can refer to it.

2018-10-20 comment 0 9407

Simple implementation of three-level linkage using JavaScript

Article Introduction：In actual JavaScript project development, we often need three-level linkage, such as the selection of provinces and municipalities, the selection of three-level product classifications, etc. Today we will explain how JavaScript implements three-level linkage, and we will share the JavaScript source code with you! If you are not familiar with JavaScript to implement three-level linkage, you can take a look with us!

2018-03-10 comment 0 3890

How to implement the selection function of province and city linkage in jquery

Article Introduction：In front-end development, province and city linkage selection is a very basic and commonly used function. In order to improve user experience and improve data validity, developers need to implement this function through certain technical means. Among them, jquery is a very commonly used JavaScript library. This article will introduce how to use jquery to realize the linkage selection function of provinces and municipalities. 1. Demand analysis 1. Three drop-down boxes are needed, representing provinces, cities, and districts respectively; 2. After selecting a province, the city drop-down box will be dynamically loaded according to the province information, and the corresponding district drop-down box will also be loaded according to the province information.

2023-04-10 comment 0 1021

How to achieve multi-level linkage of data through PHP and UniApp

Article Introduction：How to realize multi-level linkage of data through PHP and UniApp Introduction: When developing web applications and mobile applications, we often encounter the need to achieve multi-level linkage, such as the selection of provinces and cities, the selection of product categories, etc. This article will introduce how to use PHP and UniApp to achieve multi-level linkage of data, and give corresponding code examples. 1. Data preparation Before starting, we first need to prepare the data required for multi-level linkage. Suppose we want to implement a selector for three-level linkage between provinces and municipalities, we need to prepare a

2023-07-04 comment 0 856

Realize three-level linkage of provinces, cities, districts and counties based on Jquery

Article Introduction：I feel like I wrote less on the front end, just to practice my skills. I spent the afternoon writing this three-level linkage when I had nothing to do. It was also the first time I wrote this thing. As far as I know, city information can be stored in the database or written directly on the front end. To save trouble, I wrote it directly on the front end. Here is my code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/ht

2017-06-26 comment 0 1514

js implements a province and city three-level linkage selection box code sharing_javascript skills

Article Introduction：The three-level linkage between provinces and municipalities is particularly important when filling in the form. It directly improves the user's filling speed and accuracy. Next, this article uses js code to implement one. If you are interested, you can refer to it. I hope it can help you.

2016-05-16 comment 0 1455

How to set earthquake warning on Xiaomi 14Pro?

Article Introduction：Although many places in our country are plains, earthquakes occur frequently in many cities. Therefore, many mobile phone brands are equipped with earthquake warning functions on their new phones, including Xiaomi 14Pro, the just-released flagship phone. Below The editor will introduce to you how to set earthquake warning on Xiaomi 14Pro? Come and take a look, everyone! How to set earthquake warning on Xiaomi 14Pro? Step 1: Open your phone’s Settings app. Step 2: Slide to the bottom to find the "Security & Privacy" or "Security & Password" option. Step 3: Click to enter the security and privacy settings page, where you will find the "Emergency Release" or "Early Warning Information" option. Step 4: After entering the warning information page, you may need to select your region. If this option does not appear

2024-03-18 comment 0 840

How to install win7 operating system on computer

Article Introduction：Among computer operating systems, WIN7 system is a very classic computer operating system, so how to install win7 system? The editor below will introduce in detail how to install the win7 system on your computer. 1. First download the Xiaoyu system and reinstall the system software on your desktop computer. 2. Select the win7 system and click "Install this system". 3. Then start downloading the image of the win7 system. 4. After downloading, deploy the environment, and then click Restart Now after completion. 5. After restarting the computer, the Windows Manager page will appear. We choose the second one. 6. Return to the computer pe interface to continue the installation. 7. After completion, restart the computer. 8. Finally come to the desktop and the system installation is completed. One-click installation of win7 system

2023-07-16 comment 0 1222

php-insertion sort

Article Introduction：:This article mainly introduces php-insertion sort. Students who are interested in PHP tutorials can refer to it.

2016-08-08 comment 0 1080

charles captures requests in eclipse

Article Introduction：charles captures requests in eclipse

2016-12-02 comment 0 1714

Graphical method to find the path of the PHP configuration file php.ini, _PHP tutorial

Article Introduction：Illustrated method to find the path of the PHP configuration file php.ini. Graphical method to find the path of the PHP configuration file php.ini. Recently, some bloggers asked in which directory php.ini exists? Or why does it not take effect after modifying php.ini? Based on the above two questions,

2016-07-13 comment 0 829

Huawei launches two new commercial AI large model storage products, supporting 12 million IOPS performance

Article Introduction：IT House reported on July 14 that Huawei recently released new commercial AI storage products "OceanStorA310 deep learning data lake storage" and "FusionCubeA3000 training/pushing hyper-converged all-in-one machine". Officials said that "these two products can train basic AI models." , industry model training, and segmented scenario model training and inference provide new momentum." ▲ Picture source Huawei IT Home compiled and summarized: OceanStorA310 deep learning data lake storage is mainly oriented to basic/industry large model data lake scenarios to achieve data regression from Massive data management in the entire AI process from collection and preprocessing to model training and inference application. Officially stated that OceanStorA310 single frame 5U supports the industry’s highest 400GB/s

2023-07-16 comment 0 1562

The difference between the exec function and the shell_exec function in PHP, execshell_exec_PHP tutorial

Article Introduction：The difference between the exec function and the shell_exec function in PHP, execshell_exec. The difference between the exec function and the shell_exec function in PHP. Both execshell_exec functions execute Linux command functions. The difference is that the return results are different. exec can only get the last line number.

2016-07-13 comment 0 1072

Nginx server combines Nginx and tomcat to access jsp

Article Introduction：Nginx server combines Nginx and tomcat to access jsp

2016-12-02 comment 0 1820

PHP function container ing...

Article Introduction：:This article mainly introduces the PHP function container ing..., students who are interested in PHP tutorials can refer to it.

2016-08-08 comment 0 1120

PHP object-oriented programming interface usage, php object-oriented programming_PHP tutorial

Article Introduction：Interface usage of PHP object-oriented programming, PHP object-oriented programming. Interface usage in PHP object-oriented programming, PHP object-oriented programming interface is a very important concept in PHP object-oriented programming. This article explains in more detail in the form of examples

2016-07-13 comment 0 994

PHP object-oriented programming and other constant usage examples, sed usage examples_PHP tutorial

Article Introduction：PHP object-oriented programming and other constant usage examples, sed usage examples. Examples of constant usage in PHP object-oriented programming, examples of sed usage. Class constants are a very important concept in PHP object-oriented programming. A firm grasp of class constants will help further improve

2016-07-13 comment 0 1032

Java Tutorial—The Difference Between Int and Integer

Article Introduction：Java Tutorial—The Difference Between Int and Integer

2016-12-02 comment 0 2002

Sample code sharing of Get parameter method using JS in HTML page

Article Introduction：Here is a JAVASCRIPT client solution for obtaining URLs with QUESTRING parameters, which is equivalent to ASP's request.querystring and PHP's $_GET

2017-04-24 comment 0 4150

JavaWeb learning summary_Servlet development

Article Introduction：JavaWeb learning summary_Servlet development

2016-12-02 comment 0 1956