new-javascript

npm i -D new-javascript@latest // tsconfig.json // { // "compilerOptions": { // "types": ["new-javascript"], // "lib": ["dom", "dom.iterable", "esnext"] // } // } // Example TypeScript file (e.g., src/main.ts) /// <reference types="new-javascript" /> async function demonstrateNewApiUsage() { // Using File System Access API types, like FileSystemFileHandle if ('showOpenFilePicker' in window) { try { const [fileHandle] = await window.showOpenFilePicker(); console.log('File picked:', fileHandle.name); const file = await fileHandle.getFile(); console.log('File size:', file.size, 'bytes'); // Additional operations with fileHandle or file } catch (error) { if (error instanceof DOMException && error.name === 'AbortError') { console.log('File picker was dismissed.'); } else { console.error('Error with File System Access API:', error); } } } else { console.warn('File System Access API not supported by this browser.'); } // Using View Transitions API types, like document.startViewTransition if (document.startViewTransition) { console.log('View Transitions API is supported. Starting a transition.'); const transition = document.startViewTransition(() => { // Perform DOM updates that trigger the transition const contentDiv = document.getElementById('content-area'); if (contentDiv) { contentDiv.innerHTML = `<h2>Content updated at ${new Date().toLocaleTimeString()}</h2><p>This is new content.</p>`; } return Promise.resolve(); }); try { await transition.finished; console.log('View transition completed successfully.'); } catch (error) { console.error('View transition failed:', error); } } else { console.warn('View Transitions API not supported by this browser.'); } } demonstrateNewApiUsage();