Angular实现防抖和节流的示例代码

//简易版
import { debounceTime } from 'rxjs/operators';
input.valueChanges.pipe(
  debounceTime(300)
).subscribe(value => {
  // 执行搜索操作
});
 
 
//详细版
import { Component } from '@angular/core';
import { fromEvent } from 'rxjs';
import { debounceTime } from 'rxjs/operators';
 
@Component({
  selector: 'app-debounce-example',
  template: '<input (input)="onInput($event)">'
})
export class DebounceExampleComponent {
  onInput(event: Event) {
    fromEvent(event.target, 'input')
      .pipe(
        debounceTime(300)
      )
      .subscribe(() => {
        // 执行输入框搜索操作
      });
  }
}

//简易版
import { throttleTime } from 'rxjs/operators';
scrollEvent.pipe(
  throttleTime(300)
).subscribe(() => {
  // 执行滚动操作
});
 
//详细版
import { Component } from '@angular/core';
import { fromEvent } from 'rxjs';
import { throttleTime } from 'rxjs/operators';
 
@Component({
  selector: 'app-throttle-example',
  template: '<div (scroll)="onScroll($event)">'
})
export class ThrottleExampleComponent {
  onScroll(event: Event) {
    fromEvent(event.target, 'scroll')
      .pipe(
        throttleTime(300)
      )
      .subscribe(() => {
        // 执行滚动操作
      });
  }
}

import { Component } from '@angular/core';
 
@Component({
  selector: 'app-debounce-example',
  template: '<input (input)="onInput($event)">'
})
export class DebounceExampleComponent {
  onInput(event: Event) {
    this.debounceSearch();
  }
 
  debounceSearch = this.debounce(() => {
    // 执行输入框搜索操作
  }, 300);
 
  debounce(func, delay) {
    let timer;
    return function() {
      clearTimeout(timer);
      timer = setTimeout(() => {
        func.apply(this, arguments);
      }, delay);
    };
  }
}

import { Component } from '@angular/core';
 
@Component({
  selector: 'app-throttle-example',
  template: '<div (scroll)="onScroll($event)">'
})
export class ThrottleExampleComponent {
  onScroll(event: Event) {
    this.throttleScroll();
  }
 
  throttleScroll = this.throttle(() => {
    // 执行滚动操作
  }, 300);
 
  throttle(func, delay) {
    let canRun = true;
    return function() {
      if (!canRun) return;
      canRun = false;
      setTimeout(() => {
        func.apply(this, arguments);
        canRun = true;
      }, delay);
    };
  }
}