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1, Foreword In previous articles, I mentioned that I have been doing things related to sql injection recently, and I have also been doing problems related to sql injection. However, in fact, many competition questions have different test sites. They often need to combine other knowledge to get the desired results. The following question is the ...

preface Hello, guys. In the previous article, we briefly shared the Proxy in ES6. Through learning, we know that Proxy can intercept objects, so we can do some corresponding logical processing according to business needs. We also know that Vue3.0 makes a great optimization for data hijacking, in which Proxy is used. At the end of the articl ...

Common solutions to mobile terminal layout are: 1.flex flexible layout 1) The height is fixed, the width is adaptive, and px is used as the unit of elements. 2) As the screen width changes, the page will also change. The effect is similar to the fluid layout of the PC page. When the width needs to be adjusted, just use the responsive layout ...

The project of vue structure is a single page application (single page application: changing the url address will not initiate a request like the back end, and the page can be re rendered to achieve the effect of asynchronous page update, and a history record will be kept). It is based on Routing and components. Routing is used to set access pa ...

js question mark dot (?) - optional chain operator and double question mark (?) - usage of null value merging operator & deconstruction assignment: {data: {Name:'name '}} 1. Question mark dot (?) - optional chain operator The optional chain operator (?.) allows you to read the value of an attribute deep in the chain of connected objects w ...

  welcome to the front end technology camp! If you are also a front-end learner or have the idea of learning from the front-end, follow me to attack the front-end from scratch.   we are committed to introducing front-end knowledge and our own shortcuts as detailed and concise as possible, which is also a record on the way of learning. ...

1 Introduction          Vuex is a state management mode specially developed for Vue.js applications. It uses centralized storage to manage the state of all components of the application, and ensures that the state changes in a predictable way with corresponding rules.       ...

During the interview, you will inevitably encounter the problem of asynchronous execution sequence. Let's have a look. Content continuously updated ～ Asynchronous and synchronous concepts javascript language is a "single thread" language. Operations that can change the normal execution order of programs can be regarded as asynch ...

webpack is a popular and powerful tool for packaging JavaScript modules. It allows developers to construct code and assets in an intuitive way, and use simple require statements to load different types of files as needed. When built, it tracks code dependencies and packages these modules into one or more packages loaded by the browser. In the ...

    First of all, we need to make it clear that setState is not an asynchronous method, which is very similar to the reason for asynchrony: there is a deviation between the call order of hook () and synthetic events and the execution order of setState, resulting in an asynchronous presentation form, resulting in the illusion of asynchro ...