javascript web scraping example

development technology is collectively called Javaweb. 1.2. Web Application Web applications refers browser-accessible programs, often referred to as Web applications. For example, there are a.html, b.html ... multiple Web resources, which are used to provide services ext

Almost all rich web applications are based on one or more web UI libraries or frameworks, which greatly simplify the development process and bring consistency and reliability, and highly interactive user interfaces. This article introduces 15 very powerful JavaScript web UI libraries, which are very suitable for the de

This article describes how to implement the text size and font size function in Javascript. You can adjust the text size according to your habits. describes in detail the complete steps to implement this function. it is a very practical technique. If you need it, you can refer to the examples in this article to illustrate how to implement the text font size function in JavaScript. Share it with you for your

This article mainly introduces the JavaScript event delegation technology. The example analyzes the principle, applicability, and usage of event delegation technology. If you need it, you can refer to the example below to analyze the JavaScript event delegation technology. Share it with you for your reference. The spec

JavaScript allows a function to pass a variable number of parameters. Because of the built-in object arguments, the array of all parameters transmitted by a function is a remote question: JavaScript has been exposed for a long time, but you have not paid attention to it, many cool and dazzling web pages have JavaScript

This article mainly introduces the comparison and examples of the call and apply functions in Javascript. This article attempts to use a clearer and simpler way of thinking to analyze and explain the two functions, for more information about some simple Javascript operations, call and apply functions are rarely used. in other large operations, such as web applica

function (){Alert (I); // Click The corresponding subscript is displayed.}}) (I );}III. Notes1. memory leakageBecause the closure will make the variables in the function be stored in the memory, the memory consumption is very large, so the closure cannot be abused, otherwise it will cause web page performance problems.For example: The code is as follows:Function foo (){Var oDiv = document. getElementById (

function (){Alert (I); // click The corresponding subscript is displayed.}}) (I );}Iii. Notes1. Memory leakageBecause the closure will make the variables in the function be stored in the memory, the memory consumption is very large, so the closure cannot be abused, otherwise it will cause web page performance problems.For example: The Code is as follows:Function foo (){Var oDiv = document. getElementById (

Presumably everyone has played a web game. With the popularity of HTML5, browser + cloud Web App has become the future trend. There are many effects that can be achieved without JavaScript. So if you want to do web development, JavaScript must learn.The

In this article, I will use a similar example to add data items dynamically in the foreground using Javascript and save the data to the database in the background. In many web applications, we may encounter many scenarios where multiple rows of records need to be inserted dynamically. For example, on the talent website

This article mainly introduces the usage of TaffyDB In the JavaScript database. The example analyzes the usage skills related to the definition, query, update, and delete operations of the TaffyDB database, which has some reference value, for more information about TaffyDB, see the example in this article. Share it with you for your reference. The details are as

JavaScript web pages-DOM and javascript-dom I. Full name of DOM Document Object Model) Ii. What is DOM? DOM is a programming interface and an API.DOM is an API for HTML documents and XML documents. Just like JDBC is a set of APIS for databases. Iii. Usage of DOM DOM is used to access or operate node elements in HTML documents, XHTML documents, and XML documents.