Course 2545
Course Introduction:Promise is the most important and difficult technology in ES6. Interviews with medium and large companies will ask about the implementation of front-end Promise. This video tutorial starts from the most basic callback/exception syntax, to the basic use of Promise; from technical analysis of Promise difficulties, to step-by-step handwritten Promise implementation, extended async and await in-depth analysis, macro queue and micro queue detailed explanation; and finally through Classic interview questions to test the effect of Promise learning. After passing the level, you will become a Promise senior engineer.
Course 9618
Course Introduction:WeChat Mini Program provides a simple and efficient application development framework and rich components and APIs to help developers develop services with native APP experience in WeChat. This course introduces the development language, framework, capabilities, debugging, etc. of mini programs in detail, helping developers quickly and comprehensively understand all aspects of mini program development.
Course 6269
Course Introduction:HTTP is a simple request-response protocol that usually runs on top of TCP. It specifies what kind of messages the client may send to the server and what kind of response it gets. Web servers generally refer to website servers. Currently, the three most mainstream web servers are Apache, Nginx, and IIS.
Course 7440
Course Introduction:Many programmers who have worked for many years still have a very basic understanding of databases. They are confused as soon as they go out for interviews. They don’t understand basic SQL statements, more complex SQL queries, and SQL statement optimization. They don’t even know how to use them. Redis improves system performance and can withstand tens of millions of concurrencies. This set of courses will help you thoroughly understand MySQL locks, execution plans, indexes, MVCC & Redis transactions, cache, breakdown, penetration, avalanche, warm-up, etc., and you can complete all database interviews in one set!
Course 2857
Course Introduction:Course introduction: 1. Cross-domain processing, token management, route interception; 2. Real interface debugging, API layer encapsulation; 3. Secondary encapsulation of Echarts and paging components; 4. Vue packaging optimization and answers to common problems.
Best way to preload route data before accessing the route.
2023-11-17 14:54:42 0 2 379
Vue 3 and Vuetify 3 access SCSS/SASS variables in components
2023-11-17 13:52:29 0 1 293
Module is not defined in Vue project
2023-11-17 12:38:53 0 2 394
New title: New script does not correctly display strange character encoding of stored data
2023-11-17 10:51:01 0 2 273
Call to undefined function create_function()
2023-11-16 19:00:36 0 1 277
Course Introduction:The confirm and cancel function of Javascript means that when the user performs certain operations on the website, a dialog box pops up to prompt the user whether to confirm the operation or cancel. This function is widely used in website development, such as deletion operations, form submission, etc. This article will introduce in detail how to use Javascript to implement the confirmed cancellation function. 1. What is the Confirm Cancel function? The Confirm Cancel function (Confirm) is a prompt box that pops up when the user performs certain operations, prompting the user whether he is sure to perform the operation or cancel it. It usually has two buttons
2023-05-12 comment 0 2043
Course Introduction:$_SERVER['Http_REFERER'] gives us the referrer URL to determine the user request on the server. However, this is not a best practice as referrers can be compromised via HTTP. Using $_SESSioN[] in PHP to determine referrer Since HTTP_REFERER can be spoofed/forged, PHP allows us to use sessions/cookies to determine if an incoming user request is coming from your domain (server). We will create two demo pages for this article. userrequest.php code:
2024-02-28 comment 530
Course Introduction:How to determine the parameters of an absolute positioning reference? In web development, absolute positioning is a common layout technique that can accurately position elements on the page. However, when using absolute positioning, we need to provide a set of reference parameters to specify the specific position of the element. This article explains how to determine the parameters of an absolute positioning reference and provides some code examples for reference. 1. Determine the relative positioning of the parent element. When using absolute positioning, you must first determine the positioning method of the parent element. If the parent element does not specify a positioning method, it defaults to static positioning. In this kind of
2024-01-23 comment 780
Course Introduction:How to determine MySQL's hostname? When using the MySQL database, sometimes we need to determine the host name of the MySQL database to perform connection operations. Determining the host name of MySQL is actually not complicated. The following will introduce in detail how to determine the host name of MySQL, with code examples. First, we can determine the host name of MySQL in the following ways: Through the configuration file The host name of MySQL is usually configured in the MySQL configuration file.
2024-03-01 comment 125
Course Introduction:JavaScript is a widely used programming language mainly used for web development and creating interactive pages. In JavaScript, developers can create many different types of methods to accomplish various tasks. However, it is very important to ensure that these methods are defined correctly. In this article, we will explore how to properly define JavaScript methods. What are JavaScript methods? In JavaScript, a method is a collection of operations or tasks to accomplish a specific function. These methods can be used for many
2023-05-16 comment 0 191