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1.JS usage: A. Tag: < script > < / script > B. Tags can be placed in the head or body. When in the body, the script should be placed at the bottom of the < body > element to improve the display speed, because Script Compilation will slow down the display. C. Default attribute: < script type = "text / JavaScript&q ...

1, Project structure Encapsulating axios First, install axios. Generally, I will create a new network folder in the src directory of the project as our network request module, and then create a new http JS and an API JS file and a request js. http.js file is used to encapsulate our axios, API JS is used to uniformly manage our interface ...

1, Pain points of uploading large files at the front end 1. Too many files lead to tight bandwidth resources and reduced request speed; 2. If the service is interrupted, the network is interrupted and the page crashes during the upload process, the file may be uploaded again. 2, Analysis of pain points The front end selects the file and uplo ...

1, What is Axios Axios is a promise based HTTP Library (similar to jQuery's Ajax for HTTP requests)Can be used for browsers and node JS (it can be used for both the client and the server written by node.js) 2, What are the features of Axios Support promise APIIntercept requests and responsesConvert request data and response dataCance ...

What is expression language (EL)? Expression language (EL) is a mechanism that simplifies storage in Java  Accessibility of data in Bean components and other objects (such as requests, sessions, applications, etc.). There are many operators in JSP that are used in EL, such as arithmetic operators and logical operators to execute expressions. I ...

introduce vue-element-admin Is a background front-end solution based on vue and element-ui realization. It uses the latest front-end technology stack, built-in i18 internationalization solution, dynamic routing and permission verification, refines the typical business model and provides rich functional components. It can help you quickly build ...

1. Introduction In the process of application development based on Cesium, it is often encountered that the library to be used is not the standard Cesium official package. The Vue integration of the official package is quite mature and there are many materials to view. However, the unofficial package reference integration, especially in the Vu ...

A series of work came preface We briefly introduce the practice scheme of excel import and export technology. At present, the most used open source frameworks mainly include the following three categories: 1/ apache poi: poi is the most widely used import and export framework, but its disadvantages are also obvious. When exporting a lar ...

This article is all adopted <script setup> This combined API writing method is more free than the option API writing method. For details, please refer to Vue documents Description of two ways. This article will introduce the following seven component communication modes: propsemitv-modelrefsprovide/injecteventBusVuex / Pinia (state mana ...

1 problem status At first, we used the simplest offset+limit paging query method. The pseudo code is as follows: List<Student> students = new ArrayList<>(); int limit = n; int offset = 0; do { students = SELECT * FROM [table] WHERE status = [status] AND gradeId = [id] LIMIT [limit] OFFSET [offset]; push(pos); update [table] ...