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Object.is() ES5 compares whether two values are equal. There are only two operators: the equality operator (= =) and the strict equality operator (= =). Both of them have disadvantages. The former will automatically convert the data type, while the NaN of the latter is not equal to itself, and + 0 is equal to - 0. JavaScript lacks an operation ...

Previously, I shared how to support Android and Windows in the fluent plug-in. This article will add the implementation method of Web plug-in and create a simple web one-dimensional code and two-dimensional code recognition application. Reference resources https://dart.dev/web/js-interophttps://github.com/grandnexus/firebase-darthttps://pub ...

This article assumes that the reader is a developer familiar with JavaScript and React[1], has a certain understanding of Flow[2], or is familiar with the concepts related to Flow smart contract language Cadence[3]. Through this article, we will be familiar with and build a local development environment, and use JavaScript to complete the ca ...

In the process of front-end development, we often encounter the problems of shallow copy and deep copy, The following is a brief description of the concept, difference and implementation method of shallow copy and deep copy. concept Shallow copy: Shallow copy means that a new object accurately copies the attribute value of the original objec ...

What I've been doing recently is a function of the H5 page Jump applet. What I'm talking about below is the problems and solutions I encountered in the project. I don't know whether it will help you. If there is a better way, we can put forward to discuss and learn from each other. In this way, we can make rapid progress Official open labe ...

task management A major feature of JavaScript language is single thread, that is, it can only process one task at a time. In order to coordinate the behaviors of events, user interaction, scripts, UI rendering and network processing, and prevent the non blocking of the main thread, the scheme of (Event Loop) Event Loop is applied. JavaScr ...

preface As JavaScript becomes more and more popular, more and more developers begin to contact and use JavaScript. At the same time, I also found that many developers do not have a clear understanding of the most basic original values and wrapper objects of JavaScript. In this article, I'll introduce them in detail. 🧐 Let's go! text P ...

definition Cross site scripting (XSS): cross site scripting is a computer security vulnerability that often occurs in web applications. It allows malicious web users to implant code into pages provided to other users. type Storage (persistent) The cross site script can be injected into the file system or database of the server – lu ...

Original address: Some great interview questions [4] Recently, I interviewed some companies and got some offer s. I don't record concept questions, but only coding questions. In their spare time, they can do these problems and practice their hands. Graffiti intelligence will recruit a large number of people in 2021. There are vacancies i ...

catalogue   Use type script Type scripts enforce type safety Type descriptions make it possible to refactor larger applications Type scripts make team architecture communication easier Use modern features Synchronization and waiting Jean and conster Arrow = = function Propagation operator Template font (template string) Object const ...