<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <style> .textarea{ width: 400px; min-height: 20px; max-height: 300px; _height: 120px; margin-left: auto; margin-right: auto; padding: 3px; outline: 0; border: 1px solid #a0b3d6; font-size: 12px; line-height: 24px; padding: 2px; word-wrap: break-word; overflow-x: hidden; overflow-y: auto; border-color: rgba(82, 168, 236, 0.8); box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1), 0 0 8px rgba(82, 168, 236, 0.6); } </style> <body> <div class="textarea" contenteditable="true"><br /></div> </body> </html>
原文：https://www.cnblogs.com/dch0/p/12206895.html