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Register a touch event on aframe VR using the Google Cardboard V2 button (not magnetic)

I am using a Google Cardboard V2 along with aframe to create an interactive website.
The purpose of this website is to allow students to explore environments in VR.
I've implemented checkpoint teleportation controls to allow users to move around the scene using the aframe-extras package. Users are able to click on the checkpoint they want to teleport to by aiming with the aframe cursor. This works fine in 2D on both desktop and mobile. However, the click/tap event does not register when the website is in VR mode on a mobile device.
I'd like to be able to utilize Google Cardboard's trigger for teleportation. Basically, whatever checkpoint the user is currently looking at and presses the trigger on will be where they are teleported. The Cardboard V2 button is not magnetic and seems to just be a cloth pad that a phone touchscreen can register.
It seems that the aframe-button-controls package should be able to do what I need, but this has limited documentation and I'm not sure how to use it with my existing project.
Any examples are greatly appreciated.
Edit
I ended up adding a fuse onto my A-Frame cursor so the player will teleport if they look at a checkpoint for longer than 3 seconds. This isn't exactly what I wanted but it worked. I'm still looking for answers to my original question but adding this for future reference.

Alternatives to Image Capture for mobile Safari

We are creating an app that lets a user capture a number of images and it will try to create a 3D model of the target object. In order to help the users capture useful images we give them some guidance while they move their phone from one capture to the next.
We have a nice prototype working by means of navigator.mediaDevices.getUserMedia() that captures video, displays it in a <video> element, and has an overlay that shows how to move the phone. When they are ready they press a button and we grab the current frame of the streamed video.
We were quite happy with this until we realized that very often the captured image would not have enough quality; mainly they tend to be a bit blurred because the user may not hold the device totally still. This causes the math behind creating the 3D model to fail.
I am now tasked with attempting to improve this but I think I don't have many options. Here is what I have been investigating and their drawbacks:
JavaScript's ImageCapture API. This seems to be exactly what we need: a way to actually take a picture instead of grabbing a frame from a video. While the API has still an experimental status, it seems pretty stable and Chrome has it implemented since version 59. The problem is that Safari (our main target) does not have it implemented and it seems they won't ever do. I can't really find information on what their plan is though but as of today, this is not an option.
Use the input element of type file with the attribute capture. While this lets me capture images with the native camera, I cannot give the user any guide as far as I know.
Create a whole mobile app. This requires another year of work and requesting our existing users to install an app, which may not be possible. Also leaves Android devices out which we'd prefer not to.
While typing this I thought of perhaps using the video instead of capturing the images, but not sure this would help in any way.
Instead of a different approach to the way of capturing the image, I could try to only grab the image if I can confirm that the device is as close as still as possible (using a threshold value). Perhaps I could use the gyroscope for this (we are using it to check they have moved the device to a place and angle we consider useful for the process). The drawback of this is that I am not sure it would really mitigate our problem... how still is still enough? is it possible for the person to be that still for a second?
So my question here is, can anyone think of another alternative to those I descrived? or perhaps improve one of the enumerated ones?
BTW does anyone know what are Apple's plans for the ImageCapture API?

Screen-capture like DOM-capture with javascript?

I'm working on a web-app and I would like to have some first hand experience on how our users actually use our software. This is my idea:
*Use javascript to save the html-DOM and cursor-position. Possibly only the changes to the DOM to reduce the amount of data.
*Save it to the server along with the users browser used.
Do a javascript that updates the DOM according to the recording and an image that replicate the mouse movements in the corresponding browser.
Has this ever been done before?
Would this work in most cases?

As circle73 said, you can use HTML5 to do this via canvas, however, I don't think that would track the mouse position. You could write a JavaScript function to track the mouse coords every x seconds, you'd just have to time it with the screen captures so you can match up the mouse movements with the captured frames.
Your other options would be to do this via an ActiveX control as answered here: Take a screenshot of a webpage with JavaScript?

I would approach this with the following high-level strategy:
Use jQuery mouseover to record the user's mouse positions on the page. Store these positions (x,y coordinates) locally. Send a structured request to your server with these coordinates.
Use a browser automation framework like Selenium to "play" the stored coordinates. You can use the same path as your user, only in development, in order to see what he saw. For example:
void mouseMove(WebElement toElement, long xOffset, long yOffset)
This moves (from the current location) to new coordinates. There's more info here.
Take screenshots with of the page with Selenium WebDriver. More info here.

Suitable tool for simple interactive web application

I want to create not complex interactive web application. It has some pinboard and user can create many simple objects on this pinboard (e.g. many small circles). After this user can:
move these objects
delete some of them or create new ones
make multiple selection and move/rotate elements of selected group
place members of the selected group in some special order (grid, line, circle, etc)
Zoom in/out pinboard
I think that I can use Flash/Flex or JavaScript/SVG/VML for this purpose. Disadvantage of Flash is that user must have plugin. Minus of JS/SVG/VML is that there aren't such powerfull developing tools as in Flash case, but if we use some library (like http://raphaeljs.com/) application won't require flash plug-in.
I'm finding right tool for this aim. So give me some recommendations, please. Thanks in advance.

I believe that you can achieve your goals without Flash using HTML(5), JavaScript and not the least the Canvas element present in HTML5.
Bottomline is, unless you today require your application to animate a lot of objects with framerates approaching three digits, the above should suffice fine and will also pair you with a prospective Web development platform. I am often sceptical of the new stuff, but HTML5 and Canvas are fairly standardized, patent-free and are being actively adopted.
The only benefit of going with Flash that I can think of is being backed by a rich API that does 2D as well as 3D, and the fact that you can later port your ActionScript code to say, JavaScript when you finally decide to go with HTML+JavaScript instead. Aside from having to perhaps rewrite part of your drawing stack, your ActionScript code will require minimal (syntactic mostly) changes.
I would still advise you to go with my first suggestion, unless you need live (camera) video publishing, 3D, sound editing and few features not available easily outside Flash Player. Which I don't think you will need.

You might want to have a look at existing similar projects, such as SVG Edit (MIT license).

How to create a flip book/page?

I need to create a flip book/page application. I have seen flash created flip page, can it be done in any other languages, e.g. jquery or javascript? And also, what are some concepts that I am required to have in mind/knowledge on for creating a flip book?
Thanks.

Not quite sure what you mean by "flip book", can you elaborate on this?
If you mean just a digital book, that you can turn the pages of, then I would surgest looking into this AS3 page-flip engine. And here is a list of good (mostly commercial) examples
EDIT* - Not to sure why you would want to create this from scratch, as there are a ton of well made Page-flip libraries out there that are really nicely build, and are either free, or really cheep. Most of the time they are customizable too.
That said, I think they are probably all using a combination of the following:
Preloaded pages - movieclip with either an image or
other graphics preloaded into it
Gradients - to give the illusion of a 3d page that is "turning"
Trigonometry - for dragging effect. To angle the page towards mouse
Masks - to get the page folding effect, when the user start to drag the page, the next page is loaded over the top. Both these page have been masked off based on the users mouse position.
Also the Page-flip engine I linked to above (MegaZine), is open-source. So if you where really keen, then you could dive into there source code and take a look for yourself.
Hope that helps somewhat.

If you need something simple, and don't want to delve into codes, try out pressmo: http://pressmo.com/example3/1
It works faster on slower computers than most of other similar services and what's important you keep your flipbook on your own computer/web server (as online flash or offline executable).
To create a flip page you have to upload your content as a PDF file (which can be easily obtained from Word or Open Office).
Usually a good solution for flipbooks is to keep the number of your pages even, otherside the user will not have the possibility to turn the last site. All pages should be similar size also.

You can use Flex Application
Like this right: Sample Book
Code is here: Source Code