使用 JavaScript 自定义确认对话框 [英] Custom confirm dialog with JavaScript

问题描述

我想创建一个类似于 confirm() 的 JavaScript 函数，它显示一个对话框(一个带有问题和 2 个按钮的 div)并返回 true 如果用户否则点击确定"或 false.

I would like to create a JavaScript function similar to confirm() that shows a dialog (a div with a question and 2 buttons) and returns true if the user clicks "Ok" or false otherwise.

是否可以使用 JavaScript/jQuery 但不使用插件(例如 jQuery UI 或 Dialog)来做到这一点?因为我正在尝试减少尺寸和往返时间...

Is it possible to do that using JavaScript/jQuery but without plugins (e.g. jQuery UI or Dialog)? Because I'm trying to reduce size and round trip times...

我试着写了这段代码，但我不知道如何让函数等待"用户点击.

I tried to write this code, but I don't know how to make the function "wait" for the user click.

我想以这种方式使用我的函数:

I would like to use my function in this way:

answer=myConfirm("Are you sure?")

通过这种方式，我可以在多个上下文中使用相同的函数，只需更改作为参数传递的问题即可.这与 confirm()

In this way I could use the same function in several contexts, simply changing the question passed as a parameter. This is the same behavior of confirm()

推荐答案

与其等待用户的输入然后从函数中返回，在 JavaScript 中更常见的是提供一个回调函数，该回调函数将在您执行操作时调用正在等待完成.例如:

Rather than waiting for the user's input and then returning from the function, it is more common in JavaScript to provide a callback function that will be called when the action you're waiting for is complete. For example:

myCustomConfirm("Are you sure?", function (confirmed) {
    if (confirmed) {
        // Whatever you need to do if they clicked confirm
    } else {
        // Whatever you need to do if they clicked cancel
    }
});

这可以按照以下方式实现:

This could be implemented along the lines of:

function myCustomConfirm(message, callback) {
    var confirmButton, cancelButton;

    // Create user interface, display message, etc.

    confirmButton.onclick = function() { callback(true); };
    cancelButton.onclick = function() { callback(false); };
}

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