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- How to write a crawler using JavaScript
- With the continuous development of Internet technology, crawlers (Web Crawler) have become one of the most popular methods of crawling information. Through crawler technology, we can easily obtain data on the Internet and use it in many fields such as data analysis, mining, and modeling. The JavaScript language is gaining more and more attention because of its powerful front-end development tools. So, how to write a crawler using JavaScript? Next, this article will explain it to you in detail. 1. What is a reptile? A crawler refers to an automated program that simulates browsing
- Front-end Q&A . express 1305 2023-05-29 13:42:08
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- Can front-end development not use php?
- With the continuous development of the Internet, front-end development has been constantly improving and updating, and as a front-end developer, proficiency in various front-end technologies has become an essential skill. In front-end development, many people choose to use PHP language. However, with the diversified development of the Internet field, more and more people have begun to question the superiority of the PHP language, and even raised the question "Can front-end development be done without PHP?" So, can front-end development really be done without PHP? First, we need to understand what front-end and back-end are. The front end refers to the browser
- PHP Problem . express 718 2023-05-28 19:15:07
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- How to use nodejs
- Node.js can do a lot of things, from building simple static websites to building highly scalable web applications to processing large-scale data on the backend. This article will introduce several main ways to use Node.js. 1. Building Web Applications Building web applications is easy with Node.js. Node.js provides us with a set of practical web frameworks, such as Express.js, Koa.js, etc. These frameworks provide tools such as routing and middleware, making it easy to build powerful and scalable
- Front-end Q&A . express 667 2023-05-28 16:20:09
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- nodejsdeployweb
- Node.js is a JavaScript running environment based on the Chrome V8 engine. It can be used to easily develop applications with high concurrency performance. Node.js has become the framework of choice for many web applications. Web applications can be easily deployed by using some of the excellent tools and frameworks it provides. In this article, we will teach you step by step how to deploy a web application using Node.js and some tools. Step 1: Choose a Web framework and database It is very important to choose a Web framework.
- Front-end Q&A . express 620 2023-05-28 15:32:08
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- Nodejs implements file upload name
- Size and size restrictions With the continuous development of the Internet, file upload has become one of the necessary functions of many websites. In Node.js, file uploads can be implemented using a variety of modules and technologies. Below, we will introduce a file upload method based on the Express framework and discuss how to implement size and name restrictions on file uploads. 1. Install dependent modules In this article we will use the Express framework as the web server and use the multer module to handle file uploads. Let’s install these dependent modules first: ```npm i
- Front-end Q&A . express 749 2023-05-28 13:29:41
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- nodejs settings Taobao
- Node.js is an open source JavaScript runtime environment based on the Chrome V8 engine, designed to efficiently write scalable web applications. However, some users may experience slow download speeds when installing Node.js packages. The reason for this problem is the lack of reliable download sources, so in this article, we will introduce how to use Taobao NPM mirror to speed up the download of Node.js software package. Step One: Install Node.js Before you begin, you need to install the Node.js runtime environment
- Front-end Q&A . express 1003 2023-05-28 12:11:07
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- What basics are needed to learn nodejs
- Node.js is a server-side runtime environment written in JavaScript. It allows JavaScript developers to write back-end applications using JavaScript on the server side, providing more and more flexible options for full-stack development. To learn Node.js, you need to master certain basic knowledge. The following are some basics you need to master to learn Node.js: 1. JavaScript basics The development language of Node.js is JavaScript.
- Front-end Q&A . express 1003 2023-05-28 12:01:37
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- How nodejs runs html files
- With the development of front-end technology, more and more websites adopt dynamic front-end rendering methods, especially single-page applications based on frameworks such as React and Vue. These applications package various modules and components into packages using packaging tools such as webpack. Static resource files are ultimately run in the browser. However, sometimes we need to run source code or HTML files on the Node.js server for the convenience of development, testing, or operations teams. This article will dive into how to run HTML files in a Node.js environment. 1. Use Exp
- Front-end Q&A . express 2978 2023-05-28 11:47:38
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- nodejs build sip server
- SIP (Session Initiation Protocol) is a protocol commonly used for audio and video transmission. It can realize functions such as voice, video, and multimedia conferencing, and is widely used in fields such as enterprise communications, mobile communications, and WebRTC. To build a SIP server, we can use Node.js to complete it. This article will introduce how to use Node.js to build a SIP server. 1. Understand the SIP protocol. Before starting to use Node.js to build a SIP server, we need to understand SIP first.
- Front-end Q&A . express 1220 2023-05-28 11:34:38
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- What are nodejs interview questions
- As NodeJS becomes more and more popular in front-end development, more and more people are paying attention to NodeJS interview questions. NodeJS is an open source, cross-platform JavaScript runtime environment for writing server-side applications in JavaScript. In modern web development, NodeJS is widely used to build high-performance, real-time web applications and APIs. If you want to become a NodeJS developer, you need to understand the basics of this environment. During the interview process, the interviewer may ask
- Front-end Q&A . express 631 2023-05-28 11:33:37
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- How to handle static with nodejs
- Website Resources In today's Internet era, websites have become an important channel for many companies to showcase themselves. With the development of Internet technology, more and more companies have begun to make their websites into dynamic websites. However, in some scenarios, static websites still have their unique advantages, one of which is fast speed. So how to use Node.js to process static resources on a static website? Next, we will discuss this issue in detail. 1. What is a static website? Static websites are composed of static files such as HTML, CSS, and JavaScript.
- Front-end Q&A . express 1141 2023-05-28 11:14:41
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- How to set up built-in nodejs
- Node.js is an open source, cross-platform backend JavaScript runtime environment. Node.js relies on many built-in modules, which include many useful tools, interfaces and functions. How to set up built-in modules in Node.js? This article will introduce how to use Node.js's built-in modules, how to add and delete built-in modules, and how to solve common problems with built-in modules. 1. Introduction to Node.js built-in modules Node.js built-in modules refer to those that have been defined in the Node.js runtime environment.
- Front-end Q&A . express 478 2023-05-28 11:11:07
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- nodejs delete npm
- When using Node.js, we often need to install required dependencies and extension modules through npm. But what should we do when we need to uninstall some modules or delete the entire npm? This article will introduce how to delete npm. 1. Understand npm npm is the package manager of Node.js, which allows us to easily search, install, update and delete Node.js modules. The default installation path of npm is `/usr/local`, which stores all modules in `/usr/local/lib/node
- Front-end Q&A . express 2385 2023-05-28 11:07:08
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- How to start a nodeJS project
- Node.js is a popular JavaScript runtime environment for building server-side applications. This tool allows developers to write backend code using JavaScript instead of relying on other languages. Starting a Node.js project can be difficult, especially for newbies. In this article, we'll cover how to start a Node.js project, whether it's a simple "Hello World" application or a more complex web application. The following is to start Node.j
- Front-end Q&A . express 3229 2023-05-28 10:46:07
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- How to implement login in nodejs
- Node.js is a very popular server-side JavaScript programming language that plays an important role in web development applications. Implementing a complete Web application requires the use of a variety of technologies and tools, one of which is a very critical function is the user login system. In this article, we will introduce how Node.js implements login functionality. We will elaborate on the following aspects: how to build a user login form page, how to verify the information entered by the user, how to create a user session and how to use user sessions in web applications.
- Front-end Q&A . express 808 2023-05-28 10:12:07
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