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JS advanced 1, js Foundation 1. Data type Classification: Basic (value) types: num, string, boolean, null, undefined; Object (Reference) type: object, function, array; (function, array is a special object) 2. Judge the data type typeof: the result returns the data type, but all obejct returns the object instanceof: judge the specific type ...

1, Vue router needs to realize the following functions: 1. vue plug-in: vue plug-in will call vue The use () method receives a parameter. If the passed parameter is a function, call the function directly; If it is an object, the install method of the object is called. And pass in the vue instance 2. Instance objects router and route Whe ...

Recently, a puppeter service was used in the project to take a screenshot. The front-end service should be packaged into the docker image First, I use node as the initial image and print the front-end code into the image. The final image will report an error when running the screenshot, saying that it is missing: libx11 xcb so. 1. There should ...

Project architecture design Java project collection Project system architecture Based on the real business data architecture of an e-commerce website, the project realizes the data from collection to use through multi-directional closed-loop business such as front-end application, back-end program, data analysis and platform deployment. A se ...

Front end SEO code specification What is SEO? Search engine optimization is a way to improve the natural ranking of websites in relevant search engines by using the search rules of search engines. SEO refers to the behavior of making reasonable planning from the perspective of website structure, content construction scheme, user interactive c ...

CSS (x) - positioning exercise (rotation chart) preface Before reading this note, you should pay attention to a problem. CSS3 or JavaScript is still needed to complete the effect of image scrolling. What we have been doing now is static pages, and dynamic effects will be added later. The content of this record is based on the previous notes, ...

introduce Functions are the foundation of JavaScript applications. It helps you implement abstraction layers, simulation classes, information hiding and modules. It is also a first-class citizen in JavaScript. In TypeScript, although classes, namespaces and modules are supported, functions are still the main place to define behavior. Ty ...

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prefaceAfter translating the official documents of TypeScript, I used VuePress to build a blog and realized the automatic deployment of GitHub and Gitee Pages, but I finally decided to build my own website. In the process of building the website, linux commands are indispensable. Therefore, this article writes a basically sufficient Linux comma ...

CSS gradient style CSS3 Gradients CSS3 gradients allow you to show a smooth transition between two or more specified colors. Previously, you had to use images to achieve these effects. However, by using CSS3 gradients, you can reduce the download time and broadband use. In addition, the elements of the gradient effect look better when zoomin ...