如何关闭javascript中自定义的提示框

How to close custom made prompt box in javascript?

本文关键字：提示自定义何关闭 javascript 更新时间：2023-09-26

我正在尝试用javascript制作一个自定义提示框。然而，我只是不知道如何再次关闭它。"取消"按钮确实有效（提示框消失），但当您单击"确定"按钮时，该框不会消失。

由于我的代码基于此页面上的代码：https://www.developphp.com/video/JavaScript/Custom-Prompt-Box-Programming-Tutorial

但现在我看到，如果我复制页面上的示例，"确定"按钮也不起作用。有人能告诉我怎么了吗？

这是我链接到的网站上的例子，它不起作用：

<!DOCTYPE html>
<html>
<head>
<style>
#dialogoverlay{
    display: none;
    opacity: .8;
    position: fixed;
    top: 0px;
    left: 0px;
    background: #FFF;
    width: 100%;
    z-index: 10;
}
#dialogbox{
    display: none;
    position: fixed;
    background: #000;
    border-radius:7px; 
    width:550px;
    z-index: 10;
}
#dialogbox > div{ background:#FFF; margin:8px; }
#dialogbox > div > #dialogboxhead{ background: #666; font-size:19px; padding:10px; color:#CCC; }
#dialogbox > div > #dialogboxbody{ background:#333; padding:20px; color:#FFF; }
#dialogbox > div > #dialogboxfoot{ background: #666; padding:10px; text-align:right; }
</style>
<script>
function changeText(val){
    document.getElementById('status').innerHTML = val;
}
function doStuff(val){
    document.body.style.background = val;
}
function CustomAlert(){
    this.render = function(dialog){
        var winW = window.innerWidth;
        var winH = window.innerHeight;
        var dialogoverlay = document.getElementById('dialogoverlay');
        var dialogbox = document.getElementById('dialogbox');
        dialogoverlay.style.display = "block";
        dialogoverlay.style.height = winH+"px";
        dialogbox.style.left = (winW/2) - (550 * .5)+"px";
        dialogbox.style.top = "100px";
        dialogbox.style.display = "block";
        document.getElementById('dialogboxhead').innerHTML = "Acknowledge This Message";
        document.getElementById('dialogboxbody').innerHTML = dialog;
        document.getElementById('dialogboxfoot').innerHTML = '<button onclick="Alert.ok()">OK</button>';
    }
    this.ok = function(){
        document.getElementById('dialogbox').style.display = "none";
        document.getElementById('dialogoverlay').style.display = "none";
    }
}
var Alert = new CustomAlert();
function CustomConfirm(){
    this.render = function(dialog,op,id){
        var winW = window.innerWidth;
        var winH = window.innerHeight;
        var dialogoverlay = document.getElementById('dialogoverlay');
        var dialogbox = document.getElementById('dialogbox');
        dialogoverlay.style.display = "block";
        dialogoverlay.style.height = winH+"px";
        dialogbox.style.left = (winW/2) - (550 * .5)+"px";
        dialogbox.style.top = "100px";
        dialogbox.style.display = "block";
        document.getElementById('dialogboxhead').innerHTML = "Confirm that action";
        document.getElementById('dialogboxbody').innerHTML = dialog;
        document.getElementById('dialogboxfoot').innerHTML = '<button onclick="Confirm.yes('''+op+''','''+id+''')">Yes</button> <button onclick="Confirm.no()">No</button>';
    }
    this.no = function(){
        document.getElementById('dialogbox').style.display = "none";
        document.getElementById('dialogoverlay').style.display = "none";
    }
    this.yes = function(op,id){
        if(op == "delete_post"){
            deletePost(id);
        }
        document.getElementById('dialogbox').style.display = "none";
        document.getElementById('dialogoverlay').style.display = "none";
    }
}
var Confirm = new CustomConfirm();
function CustomPrompt(){
    this.render = function(dialog,func){
        var winW = window.innerWidth;
        var winH = window.innerHeight;
        var dialogoverlay = document.getElementById('dialogoverlay');
        var dialogbox = document.getElementById('dialogbox');
        dialogoverlay.style.display = "block";
        dialogoverlay.style.height = winH+"px";
        dialogbox.style.left = (winW/2) - (550 * .5)+"px";
        dialogbox.style.top = "100px";
        dialogbox.style.display = "block";
        document.getElementById('dialogboxhead').innerHTML = "A value is required";
        document.getElementById('dialogboxbody').innerHTML = dialog;
        document.getElementById('dialogboxbody').innerHTML += '<br><input id="prompt_value1">';
        document.getElementById('dialogboxfoot').innerHTML = '<button onclick="Prompt.ok('''+func+''')">OK</button> <button onclick="Prompt.cancel()">Cancel</button>';
    }
    this.cancel = function(){
        document.getElementById('dialogbox').style.display = "none";
        document.getElementById('dialogoverlay').style.display = "none";
    }
    this.ok = function(func){
        var prompt_value1 = document.getElementById('prompt_value1').value;
        window[func](prompt_value1);
        document.getElementById('dialogbox').style.display = "none";
        document.getElementById('dialogoverlay').style.display = "none";
    }
}
var Prompt = new CustomPrompt();
</script>
</head>
<body>
<div id="dialogoverlay"></div>
<div id="dialogbox">
  <div>
    <div id="dialogboxhead"></div>
    <div id="dialogboxbody"></div>
    <div id="dialogboxfoot"></div>
  </div>
</div>
<h1>My web document content ...</h1>
<h2>My web document content ...</h2>
<button onclick="alert('You look very pretty today.')">Default Alert</button>
<button onclick="Alert.render('You look very pretty today.')">Custom Alert</button>
<button onclick="Prompt.render('And you also smell very nice.')">Custom Alert 2</button>
<h3>My web document content ...</h3>
</body>
</html>

您缺少ok按钮单击的第二个参数，该参数允许您在单击ok后调用函数：

<button onclick="Prompt.render('And you also smell very nice.', 'doStuff')">Custom Alert 2</button>

这将使用提示符中的值调用doStuff。

有一种可能性是检查代码中用于元素的id，如果存在重复的id，javaScript将无法正常工作。

代码中的此语句，

document.getElementById('dialogbox').style.display = "none";

正在使用id为"dialogbox"的元素，所以如果您的页面中有另一个元素具有相同的id，您的代码将无法正常工作。如果共享了有问题的代码，则可以提供更多帮助。