scrollbar Bootstrap Modal

The real tittle is actually "how to make second shown Modal scrollbar". I have two modal on one page. The second modal should be shown as the result of ajax response sent in the first modal, so the first modal will be hidden and followed by showing the second modal. The second modal has a length, that it needs to be scrolled up and down. The problem was the scrollbar does not work for that modal, instead the scrollbar was functionable for the parent page.

So here is the solution:

 

<div class="modal fade" id="myModal"  role="dialog" aria-hidden="true" style="overflow-y: initial !important">
    <div class="modal-xl modal-dialog modal-dialog-centered" role="document">
        <div class="modal-content">
            <div class="modal-header">
                ...
            </div>
            <div class="modal-body" >
                ... 
            </div>

        </div>
    </div>
</div>

Take a look at style="overflow-y: initial !important". This is the solution.

Select2 problem in Bootstrap Modal

Its a common problem implementing select2 in Bootstrap Modal. Mostly you will face problem that either the dropdown menu shown behind the modal or the livesearch doesn't work.

I found the solution after I browsed around, unfortunately I forgot the source where I found this solution. What I remembered, blurly, I found it in Github.

So, if my HTML Bootstrap Modal looks like this:

 
<div class="modal fade" id="myModal"  role="dialog" aria-hidden="true">
    <div class="modal-xl modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                ...
            </div>
            <div class="modal-body" >
                <div class="form-group">
                    <label for="idMySelect">SELECT</label>
                    <select id="idMySelect" class="form-control basic">
                        <option value="one">option one</option>
                        <option value="two">option two</option>
                        <option value="three">option three</option>
                        ...
                    </select>
                </div> 
            </div>

        </div>
    </div>
</div>

the JS for select2 in that modal would be:

 
$("#idMySelect").select2({
     tags: true,
     dropdownParent: $('#myModal')
});

We should set each select2 separately, if we have more than one select2 and especially if those select2 are in different modal (if we use more modals in one page) or some are on the parent page.

Take Picture From Webcam With HTML 5

HTML5 has a super cool feature, that enables us to access the media installed in our PC. During developing a web app, I surprised with two things, which are already wellknown for most people maybe. But for me they are new and its really good to know.

My app has to take pictures and save them as PDF, but those pictures should not be saved. So first thing, here is my code to take pictures from a web using a webcam.

Here are my sources. Sumber 1 dan Sumber 2

HTML

 
<style>
.videoElement {
 width: 400px;
 height: 275px;
 background-color: #666;
    transform: rotateY(180deg);
    -webkit-transform:rotateY(180deg); /* Safari and Chrome */
    -moz-transform:rotateY(180deg); /* Firefox */
}
</style>

<video autoplay="true" id="video-webcam" class="videoElement" style="text-align:center">
   Izinkan untuk Mengakses Webcam untuk Demo
</video>


<img id="snapshot" style="width: 400px;height: 275px;">                          

<button onclick="takeSnapshot()"> Take Picture </button>
                            

And here is the JS code:

 
var video = document.querySelector("#video-webcam");

navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia || navigator.oGetUserMedia;

if (navigator.getUserMedia) {
    navigator.getUserMedia({ video: true }, handleVideo, videoError);
}

function handleVideo(stream) {
    video.srcObject = stream;
    //console.log(stream);
}

function videoError(e) {
    // do something
    alert("Izinkan menggunakan webcam untuk demo!")
}

function takeSnapshot() {
    var img = document.getElementById('snapshot');
    var context;
    var width = video.offsetWidth
            , height = video.offsetHeight;

    canvas = document.createElement('canvas');
    canvas.width = width;
    canvas.height = height;

    context = canvas.getContext('2d');
    context.drawImage(video, 0, 0, width, height);

    img.src = canvas.toDataURL('image/png');
    img.style="transform: scaleX(-1);width: 400px;height: 275px";

}

What I learnt from that code are:

1. The display taken from webcam has to be mirrored, as well as the picture taken. I did it with the CSS above.
2. The images, that are taken using canva, are saved in Base64 code. This is super cool, furthermore the HTML tag is able to show an image with source of Base64 code. Super cool.... this feature helps me a lot, because I don't have to save the picture in server. What I did was I took this Base64 code and put them in HTML tag, which the HTML code is later converted to PDF file

Thats all, folks