input-file-from-webcam

stencil.js component that shows the webcam and allow you to take pictures easily and changes from to back camera with one click

<script type="module" src='https://cdn.jsdelivr.net/npm/input-file-from-webcam/dist/esm/input-file-from-webcam.js'></script>
<input-file-from-webcam id="my-input"></input-file-from-webcam>

How it works?

just add:

npm install https://github.com/alevilar/input-file-from-webcam

const elInputFileFromWebcam = document.getElementById("my-input");
    elInputFileFromWebcam.addEventListener("click", (ev) => {

    elInputFileFromWebcam.takePic().then( (pic) => console.info("here is your picture", pic))
});

Properties

width

defaults to 460px in canvas you must set always the width

height

defaults to 460px in canvas you must set always the height

facing-mode

we uses "user" or "environment" but you have others. If you don't write this property. the element will change facinbg Mode each time you click the element

For more FacingModel optiones you cant read here https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/facingMode#value

callback for drawing on canvas

you can override the default behaviour by adding a callback function here. if you put something here. will execute this function for doing a canvas.drawImage

you must call ctx.drawImage(this.elVideo, left, top, imgSize, imgSize, 0,0, this.canvas.width, this.canvas.height) inside your function

we are just bypassing the callback function

let ctx = this.canvas.getContext('2d');
functionCallback.call(ctx, elVideo, left, top, imgSize, imgSize, 0,0, this.canvas.width, this.canvas.height);
```js


# Methods

## takePic
you can easily take a picture by calling this method in your element

```js
    elInputFileFromWebcam.takePic().then( (pic) => console.info("here is your picture", pic))

toggleCamera

Change front or back camera

    elInputFileFromWebcam.toggleCamera()

Events

pictureTaken

returns a File

    elInputFileFromWebcam.addEventListener("pictureTaken", (pic) => console.info("here is my pic from callback", pic))

facingModeChanged

returns a ConstrainDOMString each time a FacingModel was changed

    elInputFileFromWebcam.addEventListener("facingModeChanged", (fm) => console.info("here is your facing Mode now", fm))