Tag: hook

vue3 drag and drop hooks (compatible with mobile terminals) and custom instruction drag and drop

Article directory specific goals Overall architecture process Specific code implementation Solution 1 How to write hooks How to use hooks is as follows Option 2: Writing custom instructions The method of customizing instructions is as follows: Specific goals 1. The drag and drop function is fully functional 2. Do not invade business 3. Boundary values […]

Hook–intercept IP address access

Hook – Block IP address access: 1. Demand No process (real process) is allowed to access the websites in the blacklist; Use logs (in the form of process name + time + access object + result) to record intercepted access records and other successful access records; Check the blacklist regularly for changes. 2. Demand analysis […]

[Tian Map] VUE3 encapsulates some function hooks of Tian Map useTdtMap.js

It is only packaged based on personal habits and is for reference only. Tianditu API address: http://lbs.tianditu.gov.cn/api/js4.0/class.html In addition to the sky map, this hook also needs to introduce the open source library Image Overlay! ! ! Open source library address: http://lbs.tianditu.gov.cn/api/js4.0/opensource/source.html The detailed description of each method is reflected in the code. First, create […]

OpenProcedure of Windows ObjectType Hook

1. Background Object Type Hook is an in-depth Hook based on Object Type, which is more in-depth than the commonly used SSDT Hook. For the analysis of Object Type, please see the article “Windows Driver Development Learning Record-ObjectType Hook’s ObjectType Structure Related Analysis”. The Hook used here is one of the OpenProcedures. The article is […]

Hook technology–⑥Netfilter

1.6 Netfilter 1.6.1 Introduction Netfilter/IPTables is a new generation of Linux firewall mechanism after Linux2.4.x. It is a framework integrated into the Linux kernel network protocol stack and is a subsystem of the Linux kernel. Netfilter adopts a modular design and has good scalability. Its important tool module IPTables connects iptables in user mode to […]

React Hooks practical case

Article directory 1. Introduction to React Hooks 2. Basic usage of React Hooks 1. Use `useState` to create a state 2. Use `useEffect` to add side effects 3. Frequently Asked Questions about React Hooks 1. Circular reference problem 2. Side effects issues 4. React Hooks practical cases 1. Use useReducer and Redux: 2. Use useContext: […]

HOOK technology (take keyboard hook as an example)

1. Introduction to callback functions If you pass a function pointer (address) as a parameter to another function, and when this pointer is used to call the function it points to, we say it is a callback function. The callback function is not called directly by the implementer of the function, but is called by […]

React Hooks analysis

1. The significance of using hooks in react Hook is a new feature of React 16.8, which allows us to use state and other React features (such as life cycle) without writing classes. Class components and functional components: Class components can define their own state to save the internal state of the component. Functional components […]

React Hook Pitfall Guide (useState & useEffect)

useState const [state, setState] = useState(initialState); Returns a state, and a function that updates state. During initial rendering, the returned state (state) has the same value as the first argument passed in (initialState). The setState function is used to update state. It receives a new state value and queues a re-render of the component. state […]