How to create a dialog with “yes” and “no” options?

var answer = window.confirm("Save data?");
if (answer) {
    //some code
}
else {
    //some code
}

Use window.confirm instead of alert. This is the easiest way to achieve that functionality.

How to do this using 'inline' JavaScript:

<form action="http://www.google.com/search">
  <input type="text" name="q" />
  <input type="submit" value="Go"
    onclick="return confirm('Are you sure you want to search Google?')"
  />
</form>

Avoid inline JavaScript - changing the behaviour would mean editing every instance of the code, and it ain't pretty!

A much cleaner way is to use a data attribute on the element, such as data-confirm="Your message here". My code below supports the following actions, including dynamically-generated elements:

• a and button clicks
• form submits
• option selects

jQuery:

$(document).on('click', ':not(form)[data-confirm]', function(e){
    if(!confirm($(this).data('confirm'))){
        e.stopImmediatePropagation();
        e.preventDefault();
    }
});

$(document).on('submit', 'form[data-confirm]', function(e){
    if(!confirm($(this).data('confirm'))){
        e.stopImmediatePropagation();
        e.preventDefault();
    }
});

$(document).on('input', 'select', function(e){
    var msg = $(this).children('option:selected').data('confirm');
    if(msg != undefined && !confirm(msg)){
        $(this)[0].selectedIndex = 0;
    }
});

HTML:

<!-- hyperlink example -->
<a href="http://www.example.com" data-confirm="Are you sure you want to load this URL?">Anchor</a>

<!-- button example -->
<button type="button" data-confirm="Are you sure you want to click the button?">Button</button>

<!-- form example -->
<form action="http://www.example.com" data-confirm="Are you sure you want to submit the form?">
    <button type="submit">Submit</button>
</form>

<!-- select option example -->
<select>
    <option>Select an option:</option>
    <option data-confirm="Are you want to select this option?">Here</option>
</select>

JSFiddle demo

You have to create custome confirmBox,it is not possible to change the buttons in the dialog displayed by the confirm function.

Jquery confirmBox

see this example: https://jsfiddle.net/kevalbhatt18/6uauqLn6/

<div id="confirmBox">
    <div class="message"></div>
    <span class="yes">Yes</span>
    <span class="no">No</span>
</div>

function doConfirm(msg, yesFn, noFn)
{
    var confirmBox = $("#confirmBox");
    confirmBox.find(".message").text(msg);
    confirmBox.find(".yes,.no").unbind().click(function()
    {
        confirmBox.hide();
    });
    confirmBox.find(".yes").click(yesFn);
    confirmBox.find(".no").click(noFn);
    confirmBox.show();
}

doConfirm("Are you sure?", function yes()
{
    form.submit();
}, function no()
{
    // do nothing
});

<div id="id_confrmdiv">confirmation
    <button id="id_truebtn">Yes</button>
    <button id="id_falsebtn">No</button>
</div>

<button onclick="doSomething()">submit</button>

<script>

function doSomething(){
document.getElementById('id_confrmdiv').style.display="block"; //this is the replace of this line


document.getElementById('id_truebtn').onclick = function(){
   //do your delete operation
    alert('true');
};

document.getElementById('id_falsebtn').onclick = function(){
     alert('false');
   return false;
};
}
</script>

body { font-family: sans-serif; }
#id_confrmdiv
{
    display: none;
    background-color: #eee;
    border-radius: 5px;
    border: 1px solid #aaa;
    position: fixed;
    width: 300px;
    left: 50%;
    margin-left: -150px;
    padding: 6px 8px 8px;
    box-sizing: border-box;
    text-align: center;
}
#id_confrmdiv button {
    background-color: #ccc;
    display: inline-block;
    border-radius: 3px;
    border: 1px solid #aaa;
    padding: 2px;
    text-align: center;
    width: 80px;
    cursor: pointer;
}
#id_confrmdiv .button:hover
{
    background-color: #ddd;
}
#confirmBox .message
{
    text-align: left;
    margin-bottom: 8px;
}

This plugin can help you jquery-confirm easy to use

$.confirm({
    title: 'Confirm!',
    content: 'Simple confirm!',
    confirm: function(){
        alert('Confirmed!');
    },
    cancel: function(){
        alert('Canceled!')
    }
});