Home Web Front-end Front-end Q&A The javascript confirmation box can only fill in numbers

The javascript confirmation box can only fill in numbers

May 09, 2023 pm 06:01 PM

In web development, JavaScript often uses confirmation boxes to confirm user operations. The confirmation box can remind the user to confirm again when they submit some simple data or perform some important operations to ensure that the user's wishes and behavior are consistent. However, in the process of using JavaScript confirmation boxes, we often encounter a problem: the confirmation box can only be filled with numbers.

The confirmation box is a simple interaction method provided by the browser. The most commonly used confirmation box is to use the confirm() method of the window object. This method accepts a string parameter, which is used to display prompt information to the user. When the user clicks the confirm or cancel button, this method will return a true or false value respectively to indicate the user's choice. For example:

if(confirm("你确定要删除这篇文章吗?")){
   //执行删除操作
}
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In this confirmation box, the string parameter "Are you sure you want to delete this article?" is displayed to the user as a prompt message. When the user clicks confirm, the delete operation in the if statement will be executed. If the user chooses to cancel, the delete operation will not be performed.

However, when we use the confirm() method, we will find that different browsers have different levels of support for it. In some older browsers, the confirmation box popped up by confirm() will only display the number 0 and the number 1, which represent the two buttons "Cancel" and "Confirm". In this case, if we want to display custom text in the confirmation box, we need to use numbers to represent the meaning of the operation. For example:

if(confirm("1代表确认,0代表取消,你要继续吗?")){
   //执行操作
}
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In this confirmation box, when the user clicks the "Confirm" button, the confirm() method will return the number 1, which means that the user has selected the "Confirm" operation. In the same way, if the user clicks the "Cancel" button, the number 0 is returned, indicating that the user has selected the "Cancel" operation.

In the actual development process, although this method can solve the display problem, there are two obvious problems. The first problem is that users may be confused about what the numbers represent, leading to operational errors. The second problem is that when the amount of code in the confirmation box is large, the meaning of the number indicating the operation increases the difficulty of code readability.

For the above two problems, we can consider other solutions, such as using custom dialog boxes, modal boxes or other UI libraries. These solutions can present a more user-friendly interface as needed while allowing users to make clearer choices.

Finally, while using numbers to represent user actions may have become routine for some developers, it may be more obscure for users. Therefore, in actual business, we should provide users with more friendly interaction methods as much as possible to ensure user experience and smooth operation.

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