此textarea非彼textarea ,有经验的老司机们应该知道html标签contenteditable这个属性。
利用此属性使当前的标签成为可以输入的状态,等同于输入框。
演示地址:https://xibushijie.github.io/static/textareaHeihgAuto.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> #textarea { width: 100px; min-height: 20px; max-height: 70px; outline: 0; border: 1px solid #397EFF; font-size: 13px; overflow-x: hidden; overflow-y: auto; -webkit-user-modify: read-write-plaintext-only; } [contentEditable=true]:empty:not(:focus):before { content: attr(data-text); } </style> </head> <body> <div id="textarea" contenteditable="true" data-text="输入内容..."></div> </body> </html>
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