[英]How to declare that a button has been clicked outside the onclick function
$(document).ready(function() { var status = 'not active'; $('#button').on('click', function() { var button = 'THE BUTTON IS CLICKED'; var status = 'active'; alert(button); }); if(status == 'active'){ alert('THE BUTTON IS ACTIVATED'); } else { alert('THE BUTTON IS NOT ACTIVE'); } });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <button id="button">X</button>
在這里的代碼中,我試圖獲取onclick函數之外的按鈕status
以輸入if statement
但是它根本沒有在函數外部定義。 我想收到alert('THE BUTTON IS ACTIVATED');
工作。
您正在聲明一個新變量,也稱為status
,該變量“混淆”函數內部的外部status
。 只需刪除var
即可使用外部變量:
$(document).ready(function() { var status = 'not active'; $('#button').on('click', function() { var button = 'THE BUTTON IS CLICKED'; status = 'active'; alert(button); }); if(status == 'active'){ alert('THE BUTTON IS ACTIVATED') } else { alert('THE BUTTON IS NOT ACTIVE'); } });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <button id="button">X</button>
編輯 :您的代碼上有兩點怪異的事情:當文檔准備就緒時,僅使用一次警報狀態,並且不切換active
狀態。 也許您想要這樣(對於這種狀態,最好使用布爾變量而不是字符串):
$(document).ready(function() { var status = 'not active'; $('#button').on('click', function() { var button = 'THE BUTTON IS CLICKED'; status = (status == 'active') ? 'not active' : 'active'; alert(button); showButtonStatus(); }); function showButtonStatus() { if(status == 'active'){ alert('THE BUTTON IS ACTIVATED') } else { alert('THE BUTTON IS NOT ACTIVE'); } } });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <button id="button">X</button>
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