【JPCS独立出版】​第三届能源与动力工程国际学术会议(EPE 2024)_艾思科蓝_学术一站式服务平台

更多学术会议请看:https://ais.cn/u/nuyAF3

 

引言

一、前端框架概述

二、React:灵活高效的组件化库

2.1 React简介
2.2 React的核心优势
2.3 React的代码示例

三、Vue:渐进式的JavaScript框架

3.1 Vue简介
3.2 Vue的核心优势
3.3 Vue的代码示例

四、Angular:功能全面的前端框架

4.1 Angular简介
4.2 Angular的核心优势
4.3 Angular的代码示例

五、框架对比与选择建议

5.1 框架对比
5.2 选择建议

六、更深入的框架特性与解析

6.1 React的深入解析
6.1.1 Hooks

代码示例:使用 useState 和 useEffect

import React, { useState, useEffect } from 'react';  
  
function Counter() {  
  const [count, setCount] = useState(0);  
  
  useEffect(() => {  
    document.title = `You clicked ${count} times`;  
  });  
  
  return (  
    <div>  
      <p>You clicked {count} times</p>  
      <button onClick={() => setCount(count + 1)}>  
        Click me  
      </button>  
    </div>  
  );  
}  
  
export default Counter;
6.1.2 Context API

代码示例:使用 Context

// ThemeContext.js  
import React, { createContext, useState } from 'react';  
  
const ThemeContext = createContext({  
  theme: 'light',  
  toggleTheme: () => {},  
});  
  
export function ThemeProvider({ children }) {  
  const [theme, setTheme] = useState('light');  
  
  const toggleTheme = () => {  
    setTheme(theme === 'light' ? 'dark' : 'light');  
  };  
  
  return (  
    <ThemeContext.Provider value={{ theme, toggleTheme }}>  
      {children}  
    </ThemeContext.Provider>  
  );  
}  
  
export default ThemeContext;  
  
// 使用 Context 的组件  
function Button() {  
  return (  
    <ThemeContext.Consumer>  
      {({ theme, toggleTheme }) => (  
        <button onClick={toggleTheme} style={{ backgroundColor: theme === 'light' ? '#eee' : '#333', color: theme === 'light' ? '#333' : '#eee' }}>  
          Toggle Theme  
        </button>  
      )}  
    </ThemeContext.Consumer>  
  );  
}  
  
// 或者使用 Hooks (推荐)  
function ThemedButton() {  
  const { theme, toggleTheme } = React.useContext(ThemeContext);  
  
  return (  
    <button onClick={toggleTheme} style={{ backgroundColor: theme === 'light' ? '#eee' : '#333', color: theme === 'light' ? '#333' : '#eee' }}>  
      Toggle Theme  
    </button>  
  );  
}
6.2 Vue的深入解析
6.2.1 Vuex

代码示例:Vuex 基本使用

// store.js  
import Vue from 'vue';  
import Vuex from 'vuex';  
  
Vue.use(Vuex);  
  
export default new Vuex.Store({  
  state: {  
    count: 0  
  },  
  mutations: {  
    increment(state) {  
      state.count++;  
    }  
  },  
  actions: {  
    incrementIfOddOnRootSum({ state, commit, rootState }) {  
      if ((state.count + rootState.otherCount) % 2 === 1) {  
        commit('increment');  
      }  
    }  
  }  
});
<template>  
  <div>  
    <p>{{ count }}</p>  
    <button @click="increment">Increment</button>  
  </div>  
</template>  
  
<script>  
export default {  
  computed: {  
    count() {  
      return this.$store.state.count;  
    }  
  },  
  methods: {  
    increment() {  
      this.$store.commit('increment');  
    }  
  }  
}  
</script>
6.2.2 Vue Router

代码示例:Vue Router 基本使用

6.3 Angular的深入解析
6.3.1 Angular Modules

代码示例:定义一个 Angular 模块

import { NgModule } from '@angular/core';  
import { BrowserModule } from '@angular/platform-browser';  
import { AppComponent } from './app.component';  
  
@NgModule({  
  declarations: [  
    AppComponent  
  ],  
  imports: [  
    BrowserModule  
  ],  
  providers: [],  
  bootstrap: [AppComponent]  
})  
export class AppModule { }
6.3.2 Angular Forms

响应式表单示例

import { Component } from '@angular/core';  
import { FormControl, FormGroup } from '@angular/forms';  
  
@Component({  
  selector: 'app-reactive-form',  
  template: `  
    <form [formGroup]="profileForm">  
      <input formControlName="firstName" placeholder="First name">  
      <input formControlName="lastName" placeholder="Last name">  
      <button type="submit">Submit</button>  
    </form>  
  `  
})  
export class ReactiveFormComponent {  
  profileForm = new FormGroup({  
    firstName: new FormControl(''),  
    lastName: new FormControl('')  
  });  
}
09-24 07:49