Component Party 标志

Component Party 中文版

响应式

声明状态

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-name",
  template: `<h1>你好 {{ name }}</h1>`,
})
export class NameComponent {
  name = "张三";
}

@NgModule({
  declarations: [NameComponent],
  exports: [NameComponent],
})
export class NameModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <h1>你好 ${name}</h1>
</template>

更新状态

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-name",
  template: `<h1>你好 {{ name }}</h1>`,
})
export class NameComponent {
  name = "张三";

  constructor() {
    this.name = "李四";
  }
}

@NgModule({
  declarations: [NameComponent],
  exports: [NameComponent],
})
export class NameModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <h1>你好 ${name}</h1>
</template>

计算属性

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-doublecount",
  template: `<div>{{ doubleCount }}</div>`,
})
export class DoublecountComponent {
  count = 10;

  get doubleCount() {
    return this.count * 2;
  }
}

@NgModule({
  declarations: [DoublecountComponent],
  exports: [DoublecountComponent],
})
export class DoublecountModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <div>${doubleCount}</div>
</template>

模板语法

最简模板

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-helloworld",
  template: `<h1>你好，世界</h1>`,
})
export class HelloworldComponent {}

@NgModule({
  declarations: [HelloworldComponent],
  exports: [HelloworldComponent],
})
export class HelloworldModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <h1>你好，世界</h1>
</template>

样式

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-cssstyle",
  template: `
    <h1 class="title">我是红色的</h1>
    <button style="font-size: 10rem">我是一个按钮</button>
  `,
  styles: [
    `
      .title {
        color: red;
      }
    `,
  ],
})
export class CssStyleComponent {}

@NgModule({
  declarations: [CssStyleComponent],
  exports: [CssStyleComponent],
})
export class CssStyleModule {}

Aurelia 1 标志 Aurelia 1

.title {
  color: red;
}

DOM循环

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { CommonModule } from "@angular/common";

@Component({
  selector: "app-colors",
  template: `
    <ul>
      <li *ngFor="let color of colors">{{ color }}</li>
    </ul>
  `,
})
export class ColorsComponent {
  colors = ["红", "绿", "蓝"];
}

@NgModule({
  declarations: [ColorsComponent],
  imports: [CommonModule],
  exports: [ColorsComponent],
})
export class ColorsModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <ul>
    <li repeat.for="color of colors">${color}</li>
  </ul>
</template>

点击事件

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-counter",
  template: `
    <p>计数器: {{ count }}</p>
    <button (click)="incrementCount()">+1</button>
  `,
})
export class CounterComponent {
  count = 0;

  incrementCount() {
    this.count++;
  }
}

@NgModule({
  declarations: [CounterComponent],
  exports: [CounterComponent],
})
export class CounterModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <p>计数器: ${count}</p>
  <button click.trigger="incrementCount()">+1</button>
</template>

DOM引用

Angular 标志 Angular

import {
  Component,
  ViewChild,
  ElementRef,
  OnInit,
  NgModule,
} from "@angular/core";

@Component({
  selector: "app-inputfocused",
  template: `<input type="text" #inputRef />`,
})
export class InputfocusedComponent implements OnInit {
  @ViewChild("inputRef", { static: true })
  inputRef!: ElementRef<HTMLInputElement>;

  ngOnInit() {
    this.inputRef.nativeElement.focus();
  }
}

@NgModule({
  declarations: [InputfocusedComponent],
  exports: [InputfocusedComponent],
})
export class InputfocusedModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <input ref="inputElement" />
</template>

条件渲染

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { CommonModule } from "@angular/common";

const TRAFFIC_LIGHTS = ["红灯", "黄灯", "绿灯"];

@Component({
  selector: "app-trafficlight",
  template: `
    <button (click)="nextLight()">下一个灯</button>
    <p>现在亮着的是: {{ light }}</p>
    <p>
      你应该
      <ng-container [ngSwitch]="light">
        <span *ngSwitchCase="'红灯'">停下</span>
        <span *ngSwitchCase="'黄灯'">慢行</span>
        <span *ngSwitchCase="'绿灯'">赶紧走</span>
      </ng-container>
    </p>
  `,
})
export class TrafficlightComponent {
  lightIndex = 0;

  get light() {
    return TRAFFIC_LIGHTS[this.lightIndex];
  }

  nextLight() {
    this.lightIndex = (this.lightIndex + 1) % TRAFFIC_LIGHTS.length;
  }
}

@NgModule({
  declarations: [TrafficlightComponent],
  imports: [CommonModule],
  exports: [TrafficlightComponent],
})
export class TrafficlightModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <button click.trigger="nextLight()">下一个灯</button>
  <p>现在亮着的是: ${light}</p>
  <p>
    你应该
    <span if.bind="light === '红灯'">停下</span>
    <span if.bind="light === '黄灯'">慢行</span>
    <span if.bind="light === '绿灯'">赶紧走</span>
  </p>
</template>

生命周期

组件加载时

Angular 标志 Angular

import { Component, NgModule, OnInit } from "@angular/core";

@Component({
  selector: "app-pagetitle",
  template: `<p>页面标题: {{ pageTitle }}</p>`,
})
export class PagetitleComponent implements OnInit {
  pageTitle = "";

  ngOnInit() {
    this.pageTitle = document.title;
  }
}

@NgModule({
  declarations: [PagetitleComponent],
  exports: [PagetitleComponent],
})
export class PagetitleModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <p>页面标题: ${pageTitle}</p>
</template>

组件卸载时

Angular 标志 Angular

import { Component, NgModule, OnDestroy } from "@angular/core";

@Component({
  selector: "app-time",
  template: `<p>当前时间: {{ time }}</p>`,
})
export class TimeComponent implements OnDestroy {
  time = new Date().toLocaleTimeString();

  timer = setInterval(() => {
    this.time = new Date().toLocaleTimeString();
  }, 1000);

  ngOnDestroy() {
    clearInterval(this.timer);
  }
}

@NgModule({
  declarations: [TimeComponent],
  exports: [TimeComponent],
})
export class TimeModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <p>当前时间: ${time}</p>
</template>

组件组合

组件Props传参

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { UserprofileModule } from "./userprofile.component";

@Component({
  selector: "app-root",
  template: `
    <app-userprofile
      name="张三"
      [age]="20"
      [favouriteColors]="['green', 'blue', 'red']"
      [isAvailable]="true"
    >
    </app-userprofile>
  `,
})
export class AppComponent {}

@NgModule({
  declarations: [AppComponent],
  imports: [UserprofileModule],
  bootstrap: [AppComponent],
})
export class AppModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <require from="./user-profile"></require>
  <user-profile
    name.bind="name"
    age.bind="age"
    favourite-colors.bind="colors"
    is-available.bind="available"
  ></user-profile>
</template>

向父组件emit事件

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { AnswerButtonModule } from "./answer-button.component";

@Component({
  selector: "app-root",
  template: `
    <p>你快乐吗?</p>

    <app-answer-button (yes)="onAnswerYes()" (no)="onAnswerNo()">
    </app-answer-button>

    <p style="font-size: 50px">{{ isHappy ? "😀" : "😥" }}</p>
  `,
})
export class AppComponent {
  isHappy = true;

  onAnswerYes() {
    this.isHappy = true;
  }

  onAnswerNo() {
    this.isHappy = false;
  }
}

@NgModule({
  declarations: [AppComponent],
  imports: [AnswerButtonModule],
  bootstrap: [AppComponent],
})
export class AppModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <require from="./answer-button"></require>
  <p>你快乐吗?</p>
  <answer-button action-handler.call="handleAnswer(reply)"></answer-button>
  <p style="font-size: 50px">${isHappy ? "😀" : "😥"}</p>
</template>

slot插槽

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { FunnyButtonModule } from "./funny-button.component";

@Component({
  selector: "app-root",
  template: `<app-funny-button>点我!</app-funny-button>`,
})
export class AppComponent {}

@NgModule({
  declarations: [AppComponent],
  imports: [FunnyButtonModule],
  bootstrap: [AppComponent],
})
export class AppModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <require from="./funny-button"></require>

  <funny-button>点我!</funny-button>
</template>

slot插槽内容

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";

@Component({
  selector: "app-root",
  template: `
    <app-funny-button></app-funny-button>

    <app-funny-button>
      <ng-template #content>这是传到slot的内容!</ng-template>
    </app-funny-button>
  `,
})
export class AppComponent {}

@NgModule({
  declarations: [AppComponent],
  imports: [FunnyButtonModule],
  bootstrap: [AppComponent],
})
export class AppModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <require from="./funny-button"></require>

  <funny-button></funny-button>
  <funny-button>这是传到slot的内容!</funny-button>
</template>

上下文

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { UserService } from "./user.service";
import { UserProfileModule } from "./user-profile.component";

@Component({
  providers: [UserService],
  selector: "app-root",
  template: `
    <h1>欢迎回来, {{ userService.user.username }}</h1>
    <app-user-profile />
  `,
})
export class AppComponent {
  constructor(public userService: UserService) {}
}

@NgModule({
  declarations: [AppComponent],
  imports: [UserProfileModule],
  bootstrap: [AppComponent],
})
export class AppModule {}

Aurelia 1 标志 Aurelia 1

缺少代码片段 帮助我们改进 Component Party Component Party 标志
在 Github 上贡献

表单输入

输入框

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { FormsModule } from "@angular/forms";

@Component({
  selector: "app-input-hello",
  template: `
    <p>{{ text }}</p>
    <input [(ngModel)]="text" />
  `,
})
export class InputHelloComponent {
  text = "";
}

@NgModule({
  declarations: [InputHelloComponent],
  imports: [FormsModule],
  exports: [InputHelloComponent],
})
export class InputHelloModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <p>${text}</p>
  <input value.bind="text" />
</template>

复选框

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { FormsModule } from "@angular/forms";

@Component({
  selector: "app-is-available",
  template: `
    <input id="is-available" type="checkbox" [(ngModel)]="isAvailable" />
    <label for="is-available">这是一个checkbox</label>
  `,
})
export class IsAvailableComponent {
  isAvailable = false;
}

@NgModule({
  declarations: [IsAvailableComponent],
  imports: [FormsModule],
  exports: [IsAvailableComponent],
})
export class IsAvailableModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <input id="is-available" type="checkbox" checked.bind="isAvailable" />
  <label for="is-available">这是一个checkbox</label>: ${isAvailable}
</template>

单选框

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { FormsModule } from "@angular/forms";

@Component({
  selector: "app-pick-pill",
  template: `
    <div>你选择了: {{ picked }}</div>

    <input id="blue-pill" type="radio" value="blue" [(ngModel)]="picked" />
    <label for="blue-pill">蓝色</label>

    <input id="red-pill" type="radio" value="red" [(ngModel)]="picked" />
    <label for="red-pill">红色</label>
  `,
})
export class PickPillComponent {
  picked = "red";
}

@NgModule({
  declarations: [PickPillComponent],
  imports: [FormsModule],
  exports: [PickPillComponent],
})
export class PickPillModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <div>你选择了: ${picked}</div>

  <input id="blue-pill" checked.bind="picked" type="radio" value="blue" />
  <label for="blue-pill">蓝色</label>

  <input id="red-pill" checked.bind="picked" type="radio" value="red" />
  <label for="red-pill">红色</label>
</template>

选择器

Angular 标志 Angular

import { Component, NgModule } from "@angular/core";
import { FormsModule } from "@angular/forms";

@Component({
  selector: "app-color-select",
  template: `
    <select [(ngModel)]="selectedColorId">
      <option
        *ngFor="let color of colors"
        [value]="color.id"
        [disabled]="color.isDisabled"
      >
        {{ color.text }}
      </option>
    </select>
  `,
})
export class ColorSelectComponent {
  selectedColorId = 2;

  colors = [
    { id: 1, text: "红" },
    { id: 2, text: "蓝" },
    { id: 3, text: "绿" },
    { id: 4, text: "灰", isDisabled: true },
  ];
}

@NgModule({
  declarations: [ColorSelectComponent],
  imports: [FormsModule],
  exports: [ColorSelectComponent],
})
export class ColorSelectModule {}

Aurelia 1 标志 Aurelia 1

<template>
  <select value.bind="selectedColorId">
    <option value="">选择一个颜色</option>
    <option
      repeat.for="color of colors"
      value.bind="color.id"
      disabled.bind="color.isDisabled"
    >
      ${color.text}
    </option>
  </select>
</template>

Web应用特性

渲染应用

Angular 标志 Angular

<!doctype html>
<html>
  <body>
    <app-root></app-root>
  </body>
</html>

Aurelia 1 标志 Aurelia 1

缺少代码片段 帮助我们改进 Component Party Component Party 标志
在 Github 上贡献

fetch获取数据

Angular 标志 Angular

import { HttpClient } from "@angular/common/http";
import { Injectable } from "@angular/core";
import { BehaviorSubject } from "rxjs";

export interface UsersState {
  users: User[];
  error: string | null;
  loading: boolean;
}

export const initialState: UsersState = {
  users: [],
  error: null,
  loading: false,
};

@Injectable({ providedIn: "root" })
export class UserService {
  private state = new BehaviorSubject<UsersState>(initialState);
  state$ = this.state.asObservable();

  constructor(private http: HttpClient) {}

  loadUsers() {
    this.state.next({ ...initialState, loading: true });

    this.http
      .get<UserResponse>("https://randomuser.me/api/?results=3")
      .subscribe({
        next: ({ results }) =>
          this.state.next({ ...initialState, users: results }),
        error: (error) => this.state.next({ ...initialState, error }),
      });
  }
}

export interface UserResponse {
  results: User[];
  info: any;
}

export interface User {
  name: {
    title: string;
    first: string;
    last: string;
  };
  picture: {
    large: string;
    medium: string;
    thumbnail: string;
  };
}

Aurelia 1 标志 Aurelia 1

<template>
  <p if.bind="isLoading">正在获取用户信息……</p>
  <p if.bind="error">获取用户信息出错</p>
  <ul if.bind="users">
    <li repeat.for="user of users">
      <img src.bind="user.picture.thumbnail" alt="user" />
      <p>${ user.name.first } ${ user.name.last }</p>
    </li>
  </ul>
</template>