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1. ReferenceIn many scenarios, we may just want to read the value pointed to by a variable without obtaining its ownership. We can use references at this time. In fact, many other programming languages also have the concept of reference.Simply put, a reference is to create a variable that points to the address of another pointer, rather than di ...

📋 Personal profile 💖 About the author: Hello, I'm Daniel 😜📝 Personal homepage: Hall owner a Niu🔥🎉 Support me: like 👍+ Collection ⭐ Email + message 📝📣 Series column: web development🍁💬 Maxim: so far, all failures hinder me from moving forward! 🔥 💐 preface Today, I summarize the rest of the box model 🌷 Rounded border ...

AST is the abbreviation of Abstract Syntax Tree, namely "Abstract Syntax Tree" It represents the syntax structure of programming language in the form of tree When webpack packages JS code, webpack will add some code on the basis of our original code. For example, when we package JS code, we can convert high-level code into low-level c ...

Prototype and prototype chain in JS When talking about prototypes, we should first remember the following points, which are the key to understanding prototypes: 1. All reference types (arrays, functions, objects) can freely extend attributes (except null). 2. All reference types have a_ proto_ _ Property (also known as implicit prototype, wh ...

JQuery Mobile foundation 1. Page and dialog box This chapter introduces the method of using page control in JQuery Mobile with examples. Page control is not only a very important control in JQuery Mobile, but also an essential control. Although the usage is simple, it can reflect the depth of programmers' understanding of coding. This ...

Using babel to handle ES6 syntax Index. Write some ES6 syntax in the JS file const arr = [ new Promise(() => { }), new Promise(() => { }), ] arr.map(item => { console.log(item) }) Package using the npx webpack command (webpack-dev-server is not used here because the packaged files are placed directly in memory, making ...

Today, let's implement a simple packaging tool File dependency src ├─ a.js ├─ b.js ├─ c.js └─ index.js [external chain picture transfer failed. The source station may have anti-theft chain mechanism. It is recommended to save the picture and upload it directly (img-xxkfcw02-1643883138652)( https://raw.githubusercontent.com/nxl3477/md-img-sto ...

stay In ES5, declared variables have only var and function has two forms. However, the variables declared by var have certain disadvantages (the problem that the inner variables may cover the outer variables and the circular variables used to count are leaked to global variables, which are described below), ES6 proposes the use of let an ...

HTML The standard markup language for creating web pages is not a markup language. "Hypertext" means that the web page can contain non text elements, such as pictures, links, music, etc. HTML documents are also called web pages. Suffix: html .htm itself makes little difference. Basic syntax: Tags: tags are also called elements. Ke ...

catalogue 1, Text properties 1. Alignment attribute: align 2. font label Font attribute: face 5. Superscript: sup and subscript: sub 7. Strikethrough s, italic i, bold b 10. No line break label: nobr 2, Picture properties 1. width and height 2. Borders: border 3. Horizontal spacing: hspace 4. Vertical spacing: vspace 5. Picture sus ...