代碼javascript
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>教程</title> </head> <body> <p>測試label標籤致使onclick觸發2次</p> <p id="demo"></p> <form> <ul> <li onclick="fun\_1('male')" > <label for="male">Male</label> <input type="radio" value="0" name="sex" id="male" /> </li> <li onclick="fun\_1('female')"> <label for="female">Female</label> <input type="radio" value="1" name="sex" id="female" /> </li> </ul> </form> <script src="[https://code.jquery.com/jquery-3.1.1.min.js](https://code.jquery.com/jquery-3.1.1.min.js)"></script> <script type="text/javascript"> function fun_1(id){ alert($("#"+id).val()); } </script> </body> </html>
每次點擊都會彈窗2次;html
緣由是label標籤致使的,須要將onclick事件綁定或放到label包括的元素內。修改爲以下
java
最終代碼以下:jquery
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>教程</title> </head> <body> <p>測試label標籤致使onclick觸發2次</p> <p id="demo"></p> <form> <ul> <li > <label for="male">Male</label> <input type="radio" onclick="fun\_1('male')" value="0" name="sex" id="male" /> </li> <li> <label for="female">Female</label> <input type="radio" onclick="fun\_1('female')" value="1" name="sex" id="female" /> </li> </ul> </form> <script src="[https://code.jquery.com/jquery-3.1.1.min.js](https://code.jquery.com/jquery-3.1.1.min.js)"></script> <script type="text/javascript"> function fun_1(id){ alert($("#"+id).val()); } </script> </body> </html>