Programmer Think

Multilingual support International processing The multilingual support in the Vue project uses vue-i18n https://kazupon.github.io/vue-i18n/zh/started.html target Realize the Chinese English switching function of elementUI and feel the effect of Chinese switching Install internationalized packages npm i vue-i18n@8.22.2 Please note the ...

background useEffect seems simple, but it's not. Because I didn't understand the working principle of useEffect, I was severely cheated. The thing is this: I want to achieve a very simple "object falling" effect: The vertical position of the object is represented by the state of position y. calculated from top to bottom, the la ...

catalogue const member static member Friends this pointer and explicit const member const data member const type variables cannot be modified and are in read-only mode It must be initialized in the form of initialization parameter list const member function In terms of writing, const is written after the function A constant member f ...

Using Router, you can build a multi page single page app 1. Install the react router: npm intall react-router-dom 2 basic usage 2.1 App.js import Route component import { Route } from "react-router-dom"; 2.2 App.js definition path: There are two paths: http://localhost:3000/welcome http://localhost:3000/products Load correspo ...

1, Filter filter (1) Relational comparison filter var filter_1 = ee.Filter.eq/neq/gt/gte/lt/lte('field','field value');          //Judge the relationship and return the filter var result_filter = (FeatureCollection/ImageCollection).fliter(filter_1);      //At this time, the filtering result is still of type Collection. If a non Collec ...

Shopping cart case 1. Case effect  2. Implementation steps ① Initialize project basic structure② Encapsulating EsHeader components③ Requesting product list data based on axios④ Encapsulate EsFooter components⑤ Encapsulate EsGoods components⑥ Encapsulate the EsCounter component 1. Initialize project structure Run the following co ...

Rotation diagram of mobile terminal (written in native JS) 1, Realize the following functions: Can automatically play pictures You can drag your finger to play the carousel 2, Implementation steps Auto play function: ① Start timer ② The translate of CSS3 can be used to move the mobile terminal. Note that you can move without adding us ...

preface The component is Vue JS is one of the most powerful functions, and the scope of component instances is independent of each other, which means that the data between different components cannot refer to each other. Generally speaking, components can have the following relationships: As shown in the above figure, A and B, B and C, B an ...

From: Wangdao https://juejin.cn/post/6950584088462163982 In the face of busy schedule and urgent construction period constraints, it is undoubtedly very important to choose tools that can effectively improve productivity. Here, I sort out a list of my favorite NPM packages. In order to facilitate browsing, I also classified them, hoping t ...

prefacePromise is a very common concept in front-end interview and work. There is also a market for the handwritten implementation of its various methods. Today, I will summarize the simple implementation of promise's basic methods.catch() methodThe catch method is an encapsulation of the then method and is only used to receive error messages i ...