Programmer Group

The new project uses a lot of es6 grammar in react. I've seen Mr. Ruan Yifeng's introduction to es6 once before. Recently, I found that there are many places that I don't understand very deeply. So I've come again. By the way, I'll summarize some very practical methods. First of all, I declare that this article is reproduced: ...

Annotations are the most common part of code. They are another form of document that programmers are willing to spend their time writing at last. However, for the overall maintainability of code, annotations are a very important part. Opening a file without any annotations is like a fun adventure, but if you have limited time, the task becomes ...

1. Multimedia Embedding embed is a new tag in H5. It is a self-closing tag. There are also audio and video Tags in H5 which can be used for multimedia development of web pages. Practice has found that embed, no matter how it is set up, will play as soon as it opens the web page. Video and audio are the same, which is very im ...

JavaScript has been around for more than 20 years, and the way we've been using it to loop an array is this: for (var index = 0; index < myArray.length; index++) { console.log(myArray[index]); } I. forEvery Since JavaScript 5, we have been able to use the built-in forEach method: the function callback in the forEach method has three pa ...

In JavasScript, this is a magical keyword. Sometimes, we may see a lot of this and get dizzy. However, as long as we understand this, we don't believe that we will go around ourselves in the future. Here, I record my understanding of this and its related application. I. Understanding this This in Javascript always points to ...

Layout in HTML: absolute, relative, fixed, static 0 Collection (1) The content of positioning in CSS is: position:relative | absolute | static | fixed Static (static) has no special settings. It follows basic positioning rules and cannot be hierarchically graded by z-index, which is the default value.Relative object can not be overlap ...