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Vue.js must learn every day communication between components

What are components? Component is one of the most powerful features of Vue.js. Components can extend HTML elements and encapsulate reusable code. At a higher level, components are custom elements, and Vue.js' compiler adds special features to it. In s

2025-08-20
The reason why the drop-down menu cannot be selected on the mobile phone is based on Bootstrap. The solution is provided

The drop-down menu based on Bootstrap can be used normally in a computer browser. The drop-down list can pop up in a mobile browser, but the menu items in the list cannot be selected. Use Baidu to find the reason and replace the ontouchstart in the bootst

2025-08-20
JS implements the method of passing parameters to page a to page b

This article shares the specific method of JS to pass parameters to page b for your reference. The specific content is as follows: Use HTML5 local storage (localStorage) component (local can store 5M data for maximum local storage). LocalStorage is a loca

2025-08-20
JavaScript implementation code for comparing semantic version numbers

The so-called "semantic version number" in the preface means that the semantics are reflected in the version number, or that the version number itself is meaningful and is no longer a random number. This specification provides a relatively stric

2025-08-20
Bootstrap Learning Notes js component (4)

This time we will take a look at the use of js components. This article will be a bit long. I hope everyone can read it patiently and I believe there will be a lot of gains. Many garden friends added me to my friends and expressed their like my style of w

2025-08-20
js generates thumbnails and uploads them and repaints with canvas

Generally, when processing image upload, the usual logic is to upload the source image to the server side, and then the server side language performs the operation of scaling. This mode can generally meet most needs, but when the image we need is just a t

2025-08-20
Analysis of the usage of NodeJS Promise

Javascript is characterized by asynchronousness. Javascript cannot wait. If you implement something that needs to be waited for, you cannot stop there and wait for the result to come back. On the contrary, the bottom line is to use callback callback: you

2025-08-20
A very beautiful clock drawn using pure html5

Today I will share with you a very beautiful pure html5 clock. The entire interface is drawn from html5. Let’s take a look at the specific implementation code. Friends who need it can refer to it. Today, I will share with you a very beautiful pure html5 i

2025-08-20
a tag href attribute and onclick event use example

The a tag is mainly used to implement page redirection. It can be implemented through the href attribute or in the onclick event. Here is a brief introduction to the specific use of the a tag mainly used to implement page redirection. It can be implemente

2025-08-20
JS determines whether the requested url is accessible, and supports cross-domain judgment implementation method

As shown below:<html xmlns="http://www.w3.org/1999/xhtml"><head>

2025-08-20
Understand in-depth understanding of why string can have methods in JavaScript

We all know that JavaScript data types are divided into two categories: basic types (or primitive types) and reference types. Values of basic types are simple segments of data stored in the stack memory, and they are accessed by value. There are five basi

2025-08-20
JS upload image preview plug-in production (compatible to IE6)

1. Some methods to realize picture preview. After understanding it, the methods are actually similar. There are roughly the following ways: ① Subscribe to the onchange event of the input[type=file] element. Once the selected path is changed, upload the im

2025-08-20
js realizes the effect and beautification of select selection box

There are various beautifications of the select selection box online, and I have found a lot, but there is no good style effect. So I found an effect similar to the select selection box made using ul li. I won’t talk nonsense. I will first step up the pic

2025-08-20
js get random number instance code in range

实例如下： Function randomnum (min, max) {was range = max - min; was border = math.random (); was num = my + math.round (rand * rank

2025-08-20
Methods to define a variable in js and determine whether it is empty

Define a variable var params=null; Method to determine that params are not empty: Copy the code code as follows: if(params && params.hasOwnProperty("name")){} where: console.info(params

2025-08-20

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