Python 3 Web Crawler Actual Warfare-38, Dynamic Rendering Page Crawling: The Use of Splash

Splash is a JavaScript rendering service, a lightweight browser with HTTP API. It also connects Twisted and QT libraries in Python. With Splash, we can also achieve dynamic rendering of pages. 1. Functional introduction With Splash, we can achieve the following functions: Asynchronous rendering of mu ...

Posted on Mon, 29 Jul 2019 07:09:50 -0700 by phppaper

The existing Vue project was transformed into Nuxt project

The company's project, initially only for the realization of front-end and back-end separate development, directly selected the vue framework for development, but now the project is basically completed, found that spiders simply can not grasp the website data, search engine search, are blank without data, need to optimize the project SEO. My fi ...

Posted on Mon, 29 Jul 2019 03:29:54 -0700 by a94060

canvas draws charts

Charts are an intuitive form of data representation. Front-end development often deals with rounds of charts. Generally, third-party js libraries, such as echats, bizchats, are borrowed.But if it's just a simple icon, we can draw it by ourselves. Now let's draw a simple percentage chart. The final results are as follows html code <canvas id ...

Posted on Mon, 29 Jul 2019 02:11:40 -0700 by cohq82

Python Web Crawler-Analog Ajax Request Crawling Microblog

Python simulates Ajax requests Sometimes when we crawl a page with requests, the result may be different from what we see in the browser: we can see the normal page data in the browser, but we can not get the result with requests. This is because requests get the original HTML static documents, whil ...

Posted on Sun, 28 Jul 2019 06:43:10 -0700 by gijs25

JS Learning Notes (Chapter 14) (Form Scripts)

The Knowledge Architecture of this Chapter var EventUtil = { //Adding event handlers addHandler: function(element, type, handler){ if (element.addEventListener){ element.addEventListener(type, handler, false); } else if (element.attachEvent){ element.attachEvent("on" + type, handler); } e ...

Posted on Fri, 26 Jul 2019 22:04:16 -0700 by forcom

Layout of ASP.NET Core MVC

1. What is layout? Layouts usually contain common user interface elements, such as application headers, navigation or menu elements, and footers, as shown in the figure: Common HTML structures, such as scripts and stylesheets, are also frequently used by many pages in applications. All these shared elements can be defined in the layout and ...

Posted on Fri, 26 Jul 2019 06:44:24 -0700 by reeferd

Several Methods of Dynamic Binding Class Names with vue

class binding Individual Judgment Recommendation 1 Two conditions for dynamic switching recommendation 5 More than one recommendation 4 1. We can pass an object to `v-bind:class'to dynamically switch classes Dynamic binding of a single class according to isActive's true and false changes <div :cl ...

Posted on Thu, 25 Jul 2019 23:54:13 -0700 by mofm

Introduce the differences between Set, Map, WeakSet and WeakMap

1.set Basic Usage ES6 provides a new data structure Set. It is similar to an array, but the values of members are unique and there are no duplicate values. Set itself is a constructor for generating Set data structures. const s = new Set(); [2, 3, 5, 4, 5, 2, 2].forEach(x => s.add(x)); for ( ...

Posted on Thu, 25 Jul 2019 01:08:51 -0700 by adiwood

JavaScript Functional Programming

1: Basic concepts Functional programming is a programming way of thinking, not some grammatical rules. It encapsulates functions for high reusable functional codes to achieve high reusability (the main purpose). Functional programming features: Function is the first class citizen, because it is called functional programming, so function is the ...

Posted on Wed, 24 Jul 2019 23:20:26 -0700 by Eric_Ryk

TypeScript Learning 6-Function

Introduction Functions in TypeScript and in JavaScript are not much different from other features. A little advanced knowledge will be added here. Function-related knowledge points Here are some knowledge points about functions in TypeScript. Type declaration Function definitions in TypeScript need to declare the types of parameters and return ...

Posted on Tue, 23 Jul 2019 04:11:29 -0700 by chuckym7