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Arrow function 🙊 I believe everyone has used the arrow function. People who can use it have tried it repeatedly. They are afraid that if they use it wrong, they may choose not to use it. It is a matter of multiple codes and a few lines of words. But people who have used it say it's really cool. Then this article will find out how to play the a ...

Dictionaries Store [key, value] pairs Then, we need to declare some methods that can be used by the mapping / dictionary. set(key,value): adds a new element to the dictionary.remove(key): remove the data value corresponding to the key value from the dictionary by using the key value.has(key): if a key value exists in this dictionary, it retur ...

preface Last Saturday, a group friend @ said that Gitee's feedback module added a screenshot function. I went to experience it and found that they used my plug-in 😁， This article will share this plug-in with you. All interested developers are welcome to read this article. Plug in address and implementation principle This plug-in is impleme ...

Programming thought: integrate some experience of doing things in life into the program Process oriented: do everything by yourself, focusing on the process. Object oriented: find objects according to requirements, do everything with objects, and focus on results Object oriented features: encapsulation, inheritance, polymorphism (abstracti ...

React source code analysis 2. Design concept of react Video course (efficient learning): Enter the course Course Directory: 1. Introduction and interview questions 2. Design concept of react 3.react source code architecture 4. Source directory structure and debugging 5. JSX & Core api 6.legacy and concurrent mode entry functions 7. ...

Judge data typedata typejs has six data types, including five basic data types and one complex data typeBasic data type (value type): Number,String,Boolean,Null,undefined.Complex data type: Object Reference type: Object,Array,Function,Date,RegExpDifference between value type and reference type1. Different storage locationsThe value type occupie ...

1. Effect drawing first: 1-1. No data at the beginning (equivalent to adding): 1-2: data at the beginning (equivalent to editing):   2. Main implementation logic: With the help of the selection change method of the table of the element component (ps: table of element component )Combined with the paging component, you can define one f ...

There are dreams and dry goods. Wechat search [Daqian world] pays attention to this bowl washing wisdom who is still washing dishes in the early morning.This article GitHub https://github.com/qq449245884/xiaozhi It has been included. There are complete test sites, materials and my series of articles for the interview of front-line large factor ...

  When we design web pages, we always deal with forms, and most of the verification of forms is verified by regular expressions. On the homepage, let's learn what regular expressions are: (the figure above comes from Baidu Encyclopedia) regular expression_ Baidu Encyclopedia   Next, let's learn about the use of regular expressio ...

Finally, the core component development of Vue! Componentization: we divide a page into many components. Each component is used to implement a function block of the page, and each component can be subdivided. This will make the code easier to organize and manage, and more extensible. Vue componentization: it provides an abstraction that a ...