Input element uchun ikki tomonlama bog'lanishni…

Qoʻlda:

JavaScript yordamida input qiymatini o'zgaruvchiga bog'lash va o'zgaruvchiga o'zgartirish bilan inputni yangilash. input voqeasini tinglash va o'zgaruvchini yangilash.

let myValue = '';

const inputElement = document.getElementById('myInput');
const displayElement = document.getElementById('display');

inputElement.addEventListener('input', (event) => {
  myValue = event.target.value;
  displayElement.textContent = myValue; // Ko'rinishni yangilash
});

// Boshqa joydan o'zgaruvchini yangilash misoli
function updateValue(newValue) {
  myValue = newValue;
  inputElement.value = myValue; // Inputni yangilash
  displayElement.textContent = myValue; // Ko'rinishni yangilash
}

Frameworklar/Kitoblar yordamida:

Angular, Vue.js, React kabi frameworklar (boshqariladigan komponentlar bilan) ichki ikki tomonlama bog'lanish mexanizmlarini taqdim etadi.

Angular: [(ngModel)]="myValue"
Vue.js: v-model="myValue"
React: value va onChange yordamida holatni boshqarish.

import React, { useState } from 'react';

function MyComponent() {
  const [myValue, setMyValue] = useState('');

  const handleChange = (event) => {
    setMyValue(event.target.value);
  };

  return (
    <div>
      <input type="text" value={myValue} onChange={handleChange} />
      <p>Qiymat: {myValue}</p>
    </div>
  );
}

Proxy API yordamida:

Proxy ob'ektini yaratish, u xususiyat o'zgarishlariga javob beradi va input qiymatini yangilaydi, shuningdek input voqeasini tinglaydi va Proxy xususiyatini yangilaydi.

const inputElement = document.getElementById('myInput');
const data = { value: '' };

const reactiveData = new Proxy(data, {
  set(target, property, newValue) {
    if (property === 'value') {
      target[property] = newValue;
      inputElement.value = newValue; // Inputni yangilash
      document.getElementById('display').textContent = newValue; // Ko'rinishni yangilash
      return true;
    }
    return false;
  }
});

inputElement.addEventListener('input', (event) => {
  reactiveData.value = event.target.value; // Proxy xususiyatini yangilash
});

// Boshqa joydan Proxy xususiyatini yangilash misoli
// reactiveData.value = 'Yangi qiymat';

Maxsus Elementlar va Shadow DOM va shablonlar yordamida:

Maxsus element yaratish, u inputni inkapsulyatsiya qilish va bog'lash mantiqini Shadow DOM ichida amalga oshirish.

class TwoWayInput extends HTMLElement {
  constructor() {
    super();
    const shadowRoot = this.attachShadow({ mode: 'open' });
    shadowRoot.innerHTML = `
      <input type="text" />
      <p id="display"></p>
    `;

    this.inputElement = shadowRoot.querySelector('input');
    this.displayElement = shadowRoot.getElementById('display');

    this._value = '';

    this.inputElement.addEventListener('input', (event) => {
      this.value = event.target.value;
    });
  }

  get value() {
    return this._value;
  }

  set value(newValue) {
    this._value = newValue;
    this.inputElement.value = newValue;
    this.displayElement.textContent = newValue;
    this.dispatchEvent(new CustomEvent('change', { detail: this._value }));
  }

  connectedCallback() {
    // Ehtimol, atributdan boshlang'ich qiymatni o'rnatish
    if (this.hasAttribute('initial-value')) {
      this.value = this.getAttribute('initial-value');
    }
  }
}

customElements.define('two-way-input', TwoWayInput);

Input element uchun ikki tomonlama bog'lanishni qanday amalga oshirish mumkin?