Understanding Proxy and Relfect Proxy: A proxy for an object’s basic semantics, allowing intercept and redefinition of an object’s basic operations. obj.foo + + // object read set operation const fn = (a) => console. log(a) // Function call operation const fnP = new Proxy(fn, {<!– –> apply(target, thisArg, argArray) {<!– –> console. log(target, thisArg, […]
Tag: responsive
In-depth vue2.x source code series: handwritten code to simulate the responsive data implementation of Vue2.x
Foreword The Vue responsive principle consists of the following three parts: Data hijacking: Vue intercepts each attribute in data through the Object.defineProperty() method. When the attribute value changes, it will trigger the setter method to notify the dependency update. Publish-subscribe model: Vue uses the publish-subscribe model to implement responsive updates of data. When the data […]
Vue3 reading source code series (four): responsive principle (reactive, ref)
In the last chapter, we know how components are mounted and rendered, but one question remains: How is the responsive data collected as an effect object? In this chapter, we start with two APIs for declaring responsive data: reactive and ref: reactive // packages/reactivity/src/reactive.ts export function reactive(target: object) {<!– –> // if trying to observe […]
vue2 MVVM responsive principle
Directory two-way data binding data hijacking Compile: Observer: Dep: Watcher: Simple code implementation index.html MVue.js Observer.js Summary: Interview Elaboration Two-way data binding Data Hijacking Vue.js adopts data hijacking combined with publisher-subscription mode, hijacks the Setter and Getter of each property through Object.defineProperty(), publishes a message to the subscriber when the data changes, and triggers the […]
JS advanced – vue2 and vue3 responsive principle
1. Object monitoring method 1.1 Listener object in vue2: Object.defineProperty(obj,key,descriptor) Object.defineProperty is used in vue2 to monitor objects: //Define an object first const obj = { age: 16, height: 1.88, grade: 99 } //Loop through the object and monitor each property Object.keys(obj).forEach(key => { let value = obj[key] Object.defineProperty(obj, key, { // Operate by accessing […]
Responsive Design MediaQuery and flex
1. The concept of MediaQuery Set different css styles for screens of different sizes Example 2. @media common parameters 3. Media query code example Example of displaying MediaQuery in a browser MediaQuery comprehensive case <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta http-equiv=”X-UA-Compatible” content=”IE=edge”> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <title>Media query example</title> <style> #div0{ width: 100%; […]
Responsive page design and implementation of web-based personal web pages HTML+CSS+JavaScript (web front-end web page production class homework)
Wonderful column recommendation? About the author: A technical blogger who loves to turn logical thinking into code Author’s homepage: [Homepage–? Get more high-quality source code] Web front-end major homework: 【Practice cases of high-quality project projects (1000 sets) 】 Programmer’s interesting confession method: 【HTML Tanabata Valentine’s Day Confession Web Page Production (110 sets) 】 Super cool […]
3.1 A slightly improved Vue.js responsive system
Summary of the previous article: Design and Implementation of 3.0 Responsive System 1. Set a reasonable effect side effect function As mentioned above, if we directly use the simple effect function as a side effect function, if a side effect function is not called effect, wouldn’t it be impossible to find it. The solution is […]
Computer graduation design based on HTML+CSS+JavaScript responsive website fitness 7 pages, adapted to mobile phones, responsive pages, exquisite pages, using the bootstrap framework
Excellent column recommendationGet contact at the end of the article About the author: A technical blogger who loves to turn logical thinking into code Author’s homepage: [Homepage–? Get more high-quality source code] Web front-end major homework: 【Practice cases of high-quality project projects (1000 sets) 】 Programmer’s interesting confession method: 【HTML Tanabata Valentine’s Day Confession Web […]
Which is better for Vue3 and Vue2 responsiveness?
There are pitfalls everywhere in the interview questions, making it hard to guard against. If you don’t check the interview questions in advance, you will most likely be asked by the interviewer with a boring face. The interviewer asked: Which is better in responsive performance between Vue3 and Vue2? I thought to myself: This interviewer […]