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What is axios Axios Is an Ajax Library Based on promise encapsulation. The core is XMLHttpRequest, which can be used in browsers and node JS characteristic: Create XMLHttpRequests from the browserFrom node JS create http requestPromise API supportedIntercept requests and responsesConvert request data and response dataCancel requestAutoma ...

Dialog boxes and light boxes are widely used in websites and applications. Before that, they need to be customized - use a series of < div > to create containers, set the CSS of dialog boxes to center them, and use Javascript event handlers to show / hide mode boxes. Now, the browser has introduced a new < dialog > tab, which makes ...

One: JS data type 1. Detailed JS raw and reference data types 1. Basic TypesBoolean . Boolean values, true and false.null .A special keyword indicating a null value. JavaScript is case sensitive, so null is completely different from null, NULL, or other variables.undefined . Properties when the variable is undefined.Number . Represents a numb ...

From: Micro reading https://www.weidianyuedu.com/content/4017485010725.html It is appropriate for developers to use JavaScript Design Patterns as templates to solve problems, but it does not mean that these patterns can replace the work of developers. Through design patterns, we can combine the experience of many developers to construct cod ...

brief introductionFrom the birth reason of HTML Entry - > principle description - > practical application - > source code analysis, I will take you to analyze the HTML Entry framework in an all-round way.prefaceThe word HTML Entry may be unfamiliar to you. After all, what is HTML Entry on google? Can't find the right results. But if yo ...

Environment and scope of function Understanding what is context and scope Environment, taking our life as an example, the environment is like our surrounding facilities, schools, supermarkets, pharmacies, parks, etc. various facilities constitute our living environment. Scope, as if these peripheral facilities can only serve the surroundi ...

1,ES6 1.1. What is ES6 The programming language JavaScript is the implementation and extension of ECMAScript. ECMAScript is a syntax specification standardized by ECMA (a standards organization similar to W3C). ECMAScript defines: Language grammar – syntax parsing rules, keywords, statements, declarations, operators, etc. type – ...

In traditional javascript, there are only objects and no concept of classes. It is a prototype based object-oriented language. The characteristic of prototype object is to share its own properties with new objects. Compared with other traditional object-oriented languages, this writing method has a unique feeling! Very confusing! If you want to ...

The common primitive types of ECMAScript are String type. We can declare a String directly through literal quantity var str = 'hello world!' str.length //12 str.charAt(2) //l The original type of data itself is not an object, so there should be no properties and methods, but the original value of String type can refer to some methods It can ...

background   When it comes to building tools, I often add the word "automation" before it, because building tools are used to make us stop doing mechanical things and liberate our hands. What is front-end automation? The code that front-end engineers need to maintain is extremely huge and complex, and the processes of code maintena ...