Computer graduation project topic selection recommendation based on nodejs+Vue360 student dormitory system

Administrator; home page, personal center, dormitory information management, student management, dormitory repair management, visitor information management, utility bill management, administrator management, exchange forum, system management, studen...

2023-01-25 | QQ242219979 | 209浏览

Dark magic card of CSS art

CSS Art Dark Magic Card Reference 2 Description 9 Effect 15 Branch Line 30 HTML HTML 32 Picture 52 Main Line 56 Remove Partial Default Properties of Elements 58 Define CSS Variables CSS 74 body body 94 / card card 113 Custom Properties 132 Define Ani...

2023-01-25 | two moons | 592浏览

Beijing Hegeyou wishing you luck in the Year of the Rabbit in 2023, the Hongluo Ancient Temple is a great place to celebrate the New Year and pray for blessings in Beijing

Days: 1 day Time: January Per capita: 100 yuan With whom: with friends How to play: Photography, self-driving Published on 2023 01 25 20:09 The Spring Festival is the most traditional festival in China, family reunion and a good night together are th...

2023-01-25 | Ctrip travel notes | 187浏览

30. PyQuery: HTML-based CSS selectors

Catalog preface %E5%89%8D%E8%A8%80%C2%A0 Guide package %E5%AF%BC%E5%8C%85 Basic usage%E5%9F%BA%E6%9C%AC%E7%94%A8%E6%B3%95 select by label %E6%8C%89%E6%A0%87%E7%AD%BE%E9%80%89%E6%8B%A9 label chain operation%E6%A0%87%E7%AD%BE%E9%93%BE%E5%BC%8F%E6%93%8D...

2023-01-25 | Vec_Kun | 427浏览

react-mqtt package

import { useState, useEffect } from 'react'; import / as mqtt from 'mqtt/dist/mqtt.min'; function useMqtt { const client, setClient = useState null ; const payload, setPayload = useState {} ; const connectStatus, setConnectStatus= useState 'Connect' ...

2023-01-25 | front end_little chestnut | 825浏览

React source code analysis 6.legacy mode and concurrent mode

React startup mode React has 3 modes to enter the entrance of the main function. We can compare the three modes from the official react document, using the Concurrent mode (experimental): legacy mode: ReactDOM.render App / , rootNode .This is the way...

2023-01-25 | js_2028 | 584浏览

React source code analysis 13.hooks source code

Hook call entry In the hook source code, the hook exists in the Dispatcher, and the Dispatcher is an object. The functions called by different hooks are different. The global variable ReactCurrentDispatcher.current will be assigned the value of Hooks...

2023-01-25 | js_2028 | 924浏览

React source code analysis 2. The design concept of react

Asynchronous and interruptible Where is React15 slow? Before talking about this part, we need to talk about those factors that cause react to slow down and need to be refactored.The coordination process before React15 is synchronous, also called stac...

2023-01-25 | js_2028 | 878浏览

React source code analysis 7. Fiber architecture

The depth of the Fiber understand react15 reconcile cannot be interrupted during the render phase, it may be produced when a large number of nodes reconcile caton, because the browser all the time to the js, and carry out the js single thread.Therefo...

2023-01-25 | js_2028 | 425浏览

React source code analysis 14. Handwritten hooks

The most important thing about handwritten hooks is to understand the pointers of the hook queue and update queue and the update calculation of updateQueue import React from 'react'; import ReactDOM from 'react dom'; let workInProgressHook;//hook in ...

2023-01-25 | js_2028 | 565浏览

React source code analysis 9.diff algorithm

When updating the Fiber node in the render phase, we will call reconcileChildFibers to compare the current Fiber and jsx objects to build a workInProgress Fiber, where the current Fiber refers to the fiber tree corresponding to the current DOM, and j...

2023-01-25 | js_2028 | 320浏览

React source code analysis 15.scheduler&Lane

When we are under the similar search box to search component will be found that the component part is divided into search and display a list of search results, we expect input box to immediately response, result list can have waiting time, if the res...

2023-01-25 | js_2028 | 559浏览

React source code analysis 20. Summary & answers to interview questions in Chapter 1

To sum up, we have introduced the concept of react. If the bottleneck of cpu and io can be solved, the key is to realize asynchronous and interruptible update. We have introduced the source code architecture of react (ui=fn state), and start scheduli...

2023-01-25 | js_2028 | 908浏览

React source code analysis 16.concurrent mode

Concurrent mode react17 supports concurrent mode. The fundamental purpose of this mode is to allow applications to maintain a fast response to cpu and io. It is a set of new functions, including Fiber, Scheduler, and Lane, which can adjust the applic...

2023-01-25 | js_2028 | 865浏览

React source code analysis 10.commit stage

At the end of the render phase, commitRoot root will be called; when entering the commit phase, the root here refers to fiberRoot, and then the effectList generated in the render phase will be traversed, and the Fiber nodes on the effectList will sto...

2023-01-25 | js_2028 | 384浏览

The react source code parsing 1. Begins with introduction and questions

How to learn react source code is one of the most commonly used front-end js libraries. Familiarity with react source code has become a necessary ability for senior or senior front-end engineers.Familiarity with the source code of react will be a goo...

2023-01-25 | js_2028 | 301浏览

React source code analysis 19. Handwritten mini version of react

What is the difference between the mini-react and the real source code? In the render stage, we traversed the entire fiber tree. If nothing changes in the source code, it will hit the optimization logic, and then skip the traversal commit of this nod...

2023-01-25 | js_2028 | 514浏览

React source code analysis. Status update process

setState forceUpdate There are several ways to trigger state update in react: ReactDOM.render this.setState this.forceUpdate useState useReducer Let’s focus on this.setState and this.forceUpdate. Hooks are discussed in Chapter 13 1. this.setStateCall...

2023-01-25 | js_2028 | 308浏览

React source code analysis 3.react source code architecture

The purpose of this chapter is to let us know the react source code architecture and various modules.Before the real code learning, we need to have a map of react source code in our brain, and know the general process and framework of react rendering...

2023-01-25 | js_2028 | 841浏览

React source code analysis. Life cycle call sequence

Life cycle execution at each stage The cycle of function component hooks will be explained in the hooks chapter. The mission cycle of this chapter is mainly for class components. The life cycle execution at each stage is shown in the figure below: re...

2023-01-25 | js_2028 | 173浏览