HTMLPreview器

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HTML 代码
实时Preview
视口：
\n'; updatePreview(); } function clearEditor() { editor.value=''; updatePreview(); } function setViewport(mode) { document.querySelectorAll('.device-btn').forEach(b=>b.classList.remove('active')); event.target.classList.add('active'); if (mode==='full') { frame.style.width='100%'; frame.style.margin='0 auto'; } else { frame.style.width=mode+'px'; frame.style.margin='0 auto'; } } // 初始加载Example loadExample();