JavaScript

This article mainly introduces three methods for parsing JSON data in JavaScript. This article describes the eval () method, newFunction method, JSON. parse () method and other three methods. For more information, see Overview At present, the JSON

This article mainly introduces nodejs development-express routing and middleware. I think it is quite good. I will share it with you and give you a reference. Let's take a look at it with a small Editor. This article mainly introduces nodejs

This article summarizes some common methods for string, most of which are used based on js. Recently I have summarized some common methods in string, Most of the methods are from the JavaScript Framework Design book, If there are better methods or

This article focuses on the differences between the values of two different data types contained in JavaScript variables and the basic and reference type values. In addition, the relationship between ECMAScript and JavaScript is omitted. This

This article will share with you a piece of instance code about JavaScript to achieve seamless scrolling. The code is simple and easy to understand, and has reference value, for more information, see this article. I will share some examples of Code

During Normal project development, there are often two cases of processing time in JavaScript (1, logic processing 2, Format Conversion Processing ). Of course, I would like to talk about related technologies, and I can catch them with my eyes

About debugging when we focus only on the front-end, we use F12, which brings us a sense of security and comfort. But when we use NodeJs for background development, I have a nightmare. But don't worry about Thailand. It is inconvenient to debug

Tip: First of all, I know this article is boring. It is nothing more than this in js, and thousands of articles have already written this part. However, I still want to write an article about this in js, which is a summary. (You can refer to my

In fact, I saw the implementation of inheritance when I first learned JavaScript. At that time, I just tried to understand the code snippet from the book. Today, I think again. It seems that this is the result of the evolution of thinking

1. for basic types such as string and number, there is a difference between them. 1) for comparison between different types, if the comparison is "converted to the value of the same type", check whether the "value" is equal, if the types are

JS response implementation is also based on different CSS style sheets for external use. by obtaining the screen width of different devices, different CSS style sheets can be selectively loaded. I. CSS implementation response CSS response

JavaScript is the official language of all modern browsers. Therefore, developers in various languages may encounter JavaScript problems during interviews. This article does not cover the latest JavaScript library, general development practices, or

This article mainly introduces the function of generating one-dimensional code (barcode) by JS, and analyzes the specific steps and related operation skills of generating a barcode by using the complete example, for more information about how to

Promise became popular on the Internet at the beginning of its release of JavaScript-they helped developers get rid of callback hell and solved the asynchronous problem that plagued JavaScript developers in many places. But Promises is far from

This article mainly introduces how to get the image size and preview in javascript, and analyzes the implementation skills of javascript for processing Image Upload and preview operations in different browsers based on the complete example, for more

Although there have been countless debugging tutorials on the internet, I still have not found any article that is easy to understand. I simply try to write my own usage habits or experiences, I hope it will be helpful for children who are not very

This article describes how to sort arrays in ascending and descending order in JS, and describes how to implement simple sort operations on arrays in javascript, for more information about how to sort arrays in ascending or descending order using

This article describes how to use Node. js as the background and jQuery as the front-end AJAX code to Implement User Login and registration functions. It has good reference value. Next, let's take a look at it. This article mainly introduces the

The previous knowledge can be divided into two categories: 1. the constructor-based working mode. 2. Object-based working mode. 3. Whether to use the prototype. 4. Whether to copy attributes. 5. Both have (execute prototype property copy) BackThe

This article mainly introduces the use of return in JavaScript, including the definition and writing of return. If you need it, you can refer to this article to introduce the use of return in JavaScript, including the definition and writing of