Cara menggunakan beberapa layar

Palances Liao
Palances Liao
Thomas Steiner

Cara modern

Menggunakan window.getScreenDetails()

Untuk memastikan browser Anda mendukung metode getScreenDetails(), periksa terlebih dahulu apakah metode tersebut ada di objek window. Lalu, panggil window.getScreenDetails() untuk melampirkan layar. Menambahkan pemroses peristiwa untuk beradaptasi dengan detail layar yang diubah memungkinkan Anda mengelola beberapa layar sesuai dengan kebutuhan aplikasi Anda.

if ('getScreenDetails' in window) {
  // The Window Management API is supported.
  const screenDetails = await window.getScreenDetails();
  screenDetails.addEventListener('screenschange', (event) => {
    // Handle screens change.
  });
}

Dukungan Browser

  • 100
  • 100
  • x
  • x

Sumber

Cara klasik

Menggunakan metode window.screen

Tidak ada cara klasik untuk mengontrol tata letak multilayar, tetapi Anda dapat kembali untuk mengontrol layar saat ini dengan menggunakan properti window.screen dan mem-polyfill bentuk API baru.

if (!('getScreenDetails' in window)) {
  // Returning a one-element array with the current screen,
  // noting that there might be more.
  window.getScreenDetails = async () => [window.screen];
  // Set to `false`, noting that this might be a lie.
  window.screen.isExtended = false;
}

Dukungan Browser

  • 1
  • 12
  • 1
  • 1

Sumber

{i>Progressive enhancement <i}

Demo di bawah ini menunjukkan cara menangani beberapa layar dengan Window Management API. Kode tersebut memeriksa kemampuan browser terlebih dahulu, kemudian kembali ke cara klasik.

const detectButton = document.querySelector('#detectScreen');
const createButton = document.querySelector('#create');
const permissionLabel = document.querySelector('#permissionStatus');
const screensAvailLabel = document.querySelector('#screensAvail');
const popupUrl = './popup.html';
let screenDetails = undefined;
let permission = undefined;
let currentScreenLength = undefined;

detectButton.addEventListener('click', async () => {
  if ('getScreenDetails' in window) {
    screenDetails = await window.getScreenDetails();
    screenDetails.addEventListener('screenschange', (event) => {
      if (screenDetails.screens.length !== currentScreenLength) {
        currentScreenLength = screenDetails.screens.length;
        updateScreenInfo();
      }
    });
    try {
      permission =
        (await navigator.permissions.query({ name: 'window-management' })).state === 'granted'
          ? 'Granted'
          : 'No Permission';
    } catch (err) {
      console.error(err);
    }
    currentScreenLength = screenDetails.screens.length;
    updateScreenInfo();
  } else {
    screenDetails = window.screen;
    permission = 'Window Management API - NOT SUPPORTED';
    currentScreenLength = 1;
    updateScreenInfo();
  }
});

createButton.addEventListener('click', () => {
  let screen = screenDetails.screens[Math.floor(Math.random() * currentScreenLength)];
  options = {
    x: screen.availLeft,
    y: screen.availTop,
    width: screen.availWidth,
    height: screen.availHeight,
  };
  window.open(popupUrl, '_blank', getFeaturesFromOptions(options));
});

function getFeaturesFromOptions(options) {
  return (
    'left=' +
    options.x +
    ',top=' +
    options.y +
    ',width=' +
    options.width +
    ',height=' +
    options.height
  );
}

updateScreenInfo = () => {
  screensAvailLabel.innerHTML = currentScreenLength;
  permissionLabel.innerHTML = permission;
  if ('getScreenDetails' in window && screenDetails.screens.length >= 1) {
    createButton.disabled = false;
  } else {
    createButton.disabled = true;
  }
};

Bacaan lebih lanjut

Demo

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link
      rel="icon"
      href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🎉</text></svg>"
    />
    <title>How to use multiple screens</title>
    <link rel="stylesheet" href="/style.css" />
    <!-- TODO: Devsite - Removed inline handlers -->
    <!-- <script src="/script.js" type="module"></script> -->
  </head>
  <body>
    <h1>How to use multiple screens</h1>
    <div>
      <div>
        Permission Status:
        <span id="permissionStatus"></span>
      </div>
      <div>Screens Available: <span id="screensAvail"></span></div>
    </div>
    <button id="detectScreen">Detect Screens</button>
    <button id="create" disabled>Create Page On Random Screen</button>
  </body>
</html>

CSS


        :root {
  color-scheme: dark light;
}

html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  margin: 1rem;
  font-family: system-ui, sans-serif;
}

JS


        const detectButton = document.querySelector('#detectScreen');
const createButton = document.querySelector('#create');
const permissionLabel = document.querySelector('#permissionStatus');
const screensAvailLabel = document.querySelector('#screensAvail');
const popupUrl = 'supporting-popup.html';
let screenDetails = undefined;
let permission = undefined;
let currentScreenLength = undefined;

detectButton.addEventListener('click', async () => {
  if ('getScreenDetails' in window) {
    screenDetails = await window.getScreenDetails();
    screenDetails.addEventListener('screenschange', (event) => {
      if (screenDetails.screens.length !== currentScreenLength) {
        currentScreenLength = screenDetails.screens.length;
        updateScreenInfo();
      }
    });
    try {
      permission =
        (await navigator.permissions.query({ name: 'window-placement' }))
          .state === 'granted'
          ? 'Granted'
          : 'No Permission';
    } catch (err) {
      console.error(err);
    }
    currentScreenLength = screenDetails.screens.length;
    updateScreenInfo();
  } else {
    screenDetails = window.screen;
    permission = 'Multi-Screen Window Placement API - NOT SUPPORTED';
    currentScreenLength = 1;
    updateScreenInfo();
  }
});

createButton.addEventListener('click', () => {
  const screen =
    screenDetails.screens[Math.floor(Math.random() * currentScreenLength)];
  const options = {
    x: screen.availLeft,
    y: screen.availTop,
    width: screen.availWidth,
    height: screen.availHeight,
  };
  window.open(popupUrl, '_blank', getFeaturesFromOptions(options));
});

const getFeaturesFromOptions = (options) => {
  return (
    'left=' +
    options.x +
    ',top=' +
    options.y +
    ',width=' +
    options.width +
    ',height=' +
    options.height
  );
};

const updateScreenInfo = () => {
  screensAvailLabel.innerHTML = currentScreenLength;
  permissionLabel.innerHTML = permission;
  if ('getScreenDetails' in window && screenDetails.screens.length > 1) {
    createButton.disabled = false;
  } else {
    createButton.disabled = true;
  }
};