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  1. You are here:  
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  3. JavaScript
  4. jQuery

Attach event on dynamically added HTML

Details
Written by: Stanko Milosev
Category: jQuery
Published: 30 May 2019
Last Updated: 30 May 2019
Hits: 2539
Use the jQuery on() method.

Example:

HTML:

<!DOCTYPE html>
<html>
	<head>
		<script type="text/javascript" src="lib/jquery-3.4.1.min.js" defer></script>
		<script type="text/javascript" src="js/index.js" defer></script>
	</head>
	<body>
		<div id="append"></div>
	</body>
</html>

JS:

$('#append').append('<a href="#" class="apendTest">Test</a>');
$('#append').on('click', '.apendTest', function() {
	alert("test")
})

Infinite slider

Details
Written by: Stanko Milosev
Category: jQuery
Published: 24 December 2015
Last Updated: 06 April 2022
Hits: 4255

Another example of slider. Here I gave one example of the slider, but I didn't like that example since I am deleting and adding IMG tag, which can costs performance. I decided to write another example where I will just move pictures. Problem with which I was facing was how to make infinite? That problem I solved by splitting images in two part, then one part I will move on the end of another, and this is how I will have infinity effect.

HTML is simple:

    <div id="container">
    </div>

CSS:

#container {
    width: 17%;
    overflow: hidden;
}

.imagesTrack {
    white-space: nowrap;
    position: relative;
}

JS:

/*global jQuery, document, setInterval*/
(function () {
    "use strict";
    jQuery.getJSON("files.json", function (data) {
        var myQ = jQuery,
            firstHalfRightPosition = 0,
            secondHalfRightPosition = 0,
            px,
            firstHalf = "first-half",
            secondHalf = "second-half",
            firstHalfId = "#" + firstHalf,
            secondHalfId = "#" + secondHalf,
            widthOfFirstHalf = 0,
            widthOfSecondHalf = 0,
            spaceBetweenTwoHalfs = 10,
            loadedImgIndex = 0,
            numberOfImages = 0;

        myQ("<span class='imagesTrack' id='" + firstHalf + "'/>").appendTo("#container");
        myQ("<span class='imagesTrack' id='" + secondHalf + "'/>").appendTo("#container");

        data.forEach(function (file, index, array) {
            var imgSrc = '<img src="' + file + '" id="' + index + '">';
            numberOfImages = numberOfImages + 1;

            if (index < array.length / 2) {
                myQ(imgSrc).appendTo(firstHalfId);
            } else {
                myQ(imgSrc).appendTo(secondHalfId);
            }

            myQ('#' + index).on("load", function () {
                loadedImgIndex = loadedImgIndex + 1;
            });
        });

        secondHalfRightPosition = -spaceBetweenTwoHalfs;

        setInterval(function () {
            if (loadedImgIndex === numberOfImages) {
                widthOfFirstHalf = myQ("#first-half").width();
                widthOfSecondHalf = myQ("#second-half").width();

                px = firstHalfRightPosition + "px";
                myQ(firstHalfId).css("right", px);
                firstHalfRightPosition = firstHalfRightPosition + 1;

                px = secondHalfRightPosition + "px";
                myQ(secondHalfId).css("right", px);
                secondHalfRightPosition = secondHalfRightPosition + 1;

                if (firstHalfRightPosition === widthOfFirstHalf + spaceBetweenTwoHalfs) {
                    firstHalfRightPosition = -1 * secondHalfRightPosition - spaceBetweenTwoHalfs;
                }

                if (secondHalfRightPosition === widthOfFirstHalf + widthOfSecondHalf + spaceBetweenTwoHalfs) {
                    secondHalfRightPosition = -1 * firstHalfRightPosition - spaceBetweenTwoHalfs;
                }
            }
        }, 1);

    });
}());

Live example:

Inline images

Details
Written by: Stanko Milosev
Category: jQuery
Published: 06 December 2015
Last Updated: 29 April 2016
Hits: 6394

One small example of list of images in one line, with endless animating, where middle image will be shown as "selected".

Html part is simple we need only one line of code:

<div id="imagesTrack"></div>

CSS:

#imagesTrack {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

Javascript:

/*global jQuery, document, setInterval*/
(function () {
    "use strict";
    jQuery.getJSON("files.json", function (data) {
        data.forEach(function (file) {
            jQuery("#imagesTrack").append('<img src="' + file + '">');
        });
        setInterval(function () {
            jQuery("#imagesTrack").append('<img src="' + jQuery("img")[0].src + '">');
            jQuery("img").eq(0).remove();
            jQuery("img").eq(2).css("border", "14px solid #333");
            jQuery("img").eq(1).css("border", "");
        }, 500);
    });
}());

Interesting thing to notice here is eq, which will give us jQuery object of one item in the array (or list, whatever) of images.

Live example:

jQuery animation

Details
Written by: Stanko Milosev
Category: jQuery
Published: 09 November 2015
Last Updated: 09 November 2015
Hits: 4088

HTML:

<!DOCTYPE html>
<html lang="en">
<head>
    <script src="/jquery-2.1.4.js" type="text/javascript"></script>
    <script src="/index.js" type="text/javascript" defer></script>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>

    <div class="animation" style="position: absolute">
        I am the text which is going to be animated
    </div>

</body>
</html>

JS:

/*global $*/

$(".animation").animate({
    left: "+=500"
}, 5000, function () {
    alert("finish!");
});

Taken from here.

  1. Don't loose focus
  2. How to check jQuery version
  3. Few event examples
  4. Slider

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