how to make a color selection line in hmtl [closed] - javascript

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I want to make a color sampler line as in the attached picture, but I don't know exactly how to do it, could someone do it or at least explain how to do it

You can use the following and You will develope your needs.
<input type="color">
You should look example video : Create Color Picker

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Three.js example [closed]

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I would like to ask how to extract the example of the threejs.org example like this https://saydnaya.amnesty.org/?kind=explore.
Open your browser, press F12 and select the Inspector.
There, look for /js/src, you then have all of the scripts available.

Detect colored dots in image with tracking js [closed]

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I am trying to make a program to count the dots on all the dominoes in a picture, like this:
I want it to be a JavaScript function. I have tried to understand how to use tracking js with tutorials, but they're all abput face recognition. I only want it to detect colored dots and output how many of them are present in a picture. Is that possible in any way? Thanks for any help!
Yes you can by using some image recognition such as https://trackingjs.com/ or other.

Changing colors for an image in website [closed]

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how to partition an image in a website ? like this web site (each image is able to change her colors) : http://www.zolpan-intensement-couleurs.fr/fr/simulateur/decorateur_virtuel/index.aspx , what is the language that can we use ?
This isn't an image, it's a flash animation. Color-changing and other animations are also possible with pure CSS or with Javascript.

CSS/Javascript Create Input with Border-Bottom [closed]

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I would like to know how to create an input with a border-bottom changing color depending if the input is filled with text or not.
Here is an example (Hoshi): http://tympanus.net/Development/TextInputEffects/
I need to do the exact same thing as that "Hoshi" example. Has someone ever done that?
Thanks in advance.
Go to Your example
And make Ctrl-U everything you need is visible

Creating a spotify style slider [closed]

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How would one go about implementing a slider like this on a website? Is there an out of the box solution using something like jQuery or even just css? What is this type of slider called?
This type of the component is called carousel. There are number of choices:
http://kenwheeler.github.io/slick/
http://sorgalla.com/jcarousel/
http://owlgraphic.com/owlcarousel/
http://getbootstrap.com/javascript/#carousel

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