JavaScript获取文本框内选中的文本
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> #a{ background: #39bcb8; color: white; } #btn{ background: #af9ca4; color: white; } </style> </head> <body> <textarea id="a" rows="3" cols="20">在输入框里的内容里面：选择我,然后点击下面的按钮</textarea><br /> <button id="btn" onclick="alert(getFieldSelection(document.getElementById('a')))">button_click</button> <br /> </body> </html> <script type="text/javascript"> function getFieldSelection(select_field) { word=''; if (document.selection) { var sel = document.selection.createRange(); if (sel.text.length > 0) { word = sel.text; } } else if (select_field.selectionStart || select_field.selectionStart == '0') { var startP = select_field.selectionStart; var endP = select_field.selectionEnd; if (startP != endP) { word = select_field.value.substring(startP, endP); } } return word; } </script>
