How to change the style of alert box?

Question

I need to change the style of the \"OK\" Button in an alert box.

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Answer 1

I use SweetAlert, It's Awesome, You will get lots of customization option as well as all callbacks

swal("Here's a message!", "It's pretty, isn't it?");

Answer 2

I use AlertifyJS to style my dialogues.

alertify.alert('Ready!');
alertify.YoutubeDialog || alertify.dialog('YoutubeDialog',function(){
    var iframe;
    return {
        // dialog constructor function, this will be called when the user calls alertify.YoutubeDialog(videoId)
        main:function(videoId){
            //set the videoId setting and return current instance for chaining.
            return this.set({ 
                'videoId': videoId
            });
        },
        // we only want to override two options (padding and overflow).
        setup:function(){
            return {
                options:{
                    //disable both padding and overflow control.
                    padding : !1,
                    overflow: !1,
                }
            };
        },
        // This will be called once the DOM is ready and will never be invoked again.
        // Here we create the iframe to embed the video.
        build:function(){           
            // create the iframe element
            iframe = document.createElement('iframe');
            iframe.frameBorder = "no";
            iframe.width = "100%";
            iframe.height = "100%";
            // add it to the dialog
            this.elements.content.appendChild(iframe);

            //give the dialog initial height (half the screen height).
            this.elements.body.style.minHeight = screen.height * .5 + 'px';
        },
        // dialog custom settings
        settings:{
            videoId:undefined
        },
        // listen and respond to changes in dialog settings.
        settingUpdated:function(key, oldValue, newValue){
            switch(key){
               case 'videoId':
                    iframe.src = "https://www.youtube.com/embed/" + newValue + "?enablejsapi=1";
                break;   
            }
        },
        // listen to internal dialog events.
        hooks:{
            // triggered when the dialog is closed, this is seperate from user defined onclose
            onclose: function(){
                iframe.contentWindow.postMessage('{"event":"command","func":"pauseVideo","args":""}','*');
            },
            // triggered when a dialog option gets update.
            // warning! this will not be triggered for settings updates.
            onupdate: function(option,oldValue, newValue){
                switch(option){
                    case 'resizable':
                        if(newValue){
                            this.elements.content.removeAttribute('style');
                            iframe && iframe.removeAttribute('style');
                        }else{
                            this.elements.content.style.minHeight = 'inherit';
                            iframe && (iframe.style.minHeight = 'inherit');
                        }
                    break;    
                }    
            }
        }
    };
});
//show the dialog
alertify.YoutubeDialog('GODhPuM5cEE').set({frameless:true});

<!-- JavaScript -->
<script src="//cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/alertify.min.js"></script>
<!-- CSS -->
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/css/alertify.min.css"/>
<!-- Default theme -->
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/css/themes/default.min.css"/>
<!-- Default theme -->
<link rel="stylesheet" href="//cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/css/themes/default.rtl.min.css"/>

Answer 3

Not possible. If you want to customize the dialog's visual appearance, you need to use a JS-based solution like jQuery.UI dialog.

Answer 4

I don't think you could change the style of browsers' default alert boxes.

You need to create your own or use a simple and customizable library like xdialog. Following is a example to customize the alert box. More demos can be found here.

function show_alert() {
    xdialog.alert("Hello! I am an alert box!");
}

<head>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/xxjapp/xdialog@3/xdialog.min.css"/>
    <script src="https://cdn.jsdelivr.net/gh/xxjapp/xdialog@3/xdialog.min.js"></script>
    
    <style>
        .xd-content .xd-body .xd-body-inner {
            max-height: unset;
        }
        .xd-content .xd-body p {
            color: #f0f;
            text-shadow: 0 0 5px rgba(0, 0, 0, 0.75);
        }
        .xd-content .xd-button.xd-ok {
            background: #734caf;
        }
    </style>
</head>
<body>
    <input type="button" onclick="show_alert()" value="Show alert box" />
</body>

Answer 5

I use sweetalert2 library. It's really simple, a lot of customization, modern, animated windows, eye-catching, and also nice design.

Swal.fire({
  icon: 'error',
  title: 'Oops...',
  text: 'Something went wrong!',
  footer: '<a href>Why do I have this issue?</a>'
})

Check this link

Answer 6

<head>
  

<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
  
    <script type="text/javascript">
  

$(function() {
    $( "#dialog" ).dialog({
      autoOpen: false,
      show: {
        effect: "blind",
        duration: 1000
      },
      hide: {
        effect: "explode",
        duration: 1000
      }
    });
 
    $( "#opener" ).click(function() {
      $( "#dialog" ).dialog( "open" );
    });
  });
    </script>
</head>
<body>
   <div id="dialog" title="Basic dialog">
   <p>This is an animated dialog which is useful for displaying information. The dialog window can be moved, resized and closed with the 'x' icon.</p>
  </div>
 
  <button id="opener">Open Dialog</button>

</body>