Category：JavaScript
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Time：2020-12-1
1、 Document loading mode 1. Events Three elements: event source (the element of trigger time); event name (click event); event handler (code function form to be executed after the event starts) Problems: when the browser loads a page, it loads it in the top-down order. If the script tag is written into the head, the […]
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Time：2020-12-1
Using the Struts2 form to transfer values, you can pass a value or as the attributes of an object, which is very flexible and convenient. But what if we need to pass an array and want struts to receive it correctly? I’ll explain it in two ways: normal forms and Ajax. First, we have an […]
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Time：2020-12-1
Effect picture display: Implementation method: Add a cover view to the video, and write two cover images in the cover view. One is used to store the cover image and the other is used to store the play button. A cover view is written at the same level to complete the text on the cover. […]
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Time：2020-11-30
We start with a simple tree algorithm 17. Alphabetic combination of telephone numbersGiven a string containing only numbers 2-9, returns all combinations of letters it can represent. Give the number to letter mapping as follows (same as the phone key). Note that 1 does not correspond to any letter. Example: Input: “23” Output: [ad […]
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Time：2020-11-30
The following is about Jquery.history To solve the forward and backward problem of Ajax, please see the following for details. The premise of this article is based on the background, so we will not consider the issue of SEO here. At the same time, based on the background of the management system, also do not […]
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Time：2020-11-30
In this paper, we share the specific code of JS to realize the simple calendar effect for your reference. The specific content is as follows Knowledge points 1. Introduce my Toolkit2. Use JavaScript built-in object date Operation effect code <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <title>Title</title> <style> *{ margin: 0; padding: 0; } #box{ […]
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Time：2020-11-29
As we all know, many apps have the function of incremental update. At the beginning of this year, uni app launched the function of incremental update. Today we will learn a wave. Of course, in order to prevent developers from providing illegal content to users without market approval, many application markets, especially apple, are averse […]
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Time：2020-11-29
DOM:Document/Object/Model DOM is a tree with nodes, which are divided into document (HTML), element (element), text (text), comment (comment) and others DOMThe main function is: throughConstructorPutnodeBecomeobjectBy calling theAPI To manipulate objects ——————————————————————————————————————————————————————- Interface of node 1. Properties nodeName，nodeType，nodeValue， childNodes，parentNode，parentElement firstChild，lastChild，nextSibling，previousSibling InnerText, textcontent outerText，ownerDocument ——————————————————————————————————————————————————————————— Some problems needing attention document.body.childNodes Get child node(will get […]
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Time：2020-11-29
Due to the limitation of the same source policy, JavaScript has the problem of cross domain communication. The typical cross domain problem is the communication between iframe and its parent. There are several conventional solutions: (1) document.domain +Iframe; (2) creating script dynamically; (3) iframe+ location.hash ； (4) flash。 PostMessage is a new API introduced by […]
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Time：2020-11-28
In the process of implementing the customer service system, the title bar will flash when there is a new message Because the chat box is the page that is entered by the iframe box, after receiving the websocket message in the chat box, the message should be sent to the parent page, and the title […]
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Time：2020-11-28
What is Ajax AJAX is the abbreviation of asynchronous JavaScript and XML. This technology can request additional data from the server without unloading the whole page, which will bring good user experience. The traditional HTTP request process is like this: the browser sends a request to the server – 〉 the server generates a response […]
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Time：2020-11-28
Recently, I learned to use webpack4.0 to build Vue scaffold by myself. In the process of building, I stepped on many pits. When I used file loader to package image files, I encountered the following problems. This is my webpack configuration item for processing packaged images: … module: { rules: [ … { test: /\.(jpe?g|png|gif|svg)$/i, […]
