Add border to button when clicked [closed] - javascript

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I have four buttons, I would like that each time one of them is clicked it has a blue border. And if another one is clicked, the previous one will immediately get back its usual border style.
I tried with loop but it doesn't work

You can simply use CSS :focus to give it the blue border.
https://developer.mozilla.org/en-US/docs/Web/CSS/:focus

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I want to crop and delete a part from the middle of an image in angular(or javascript) [closed]

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As a result of my research, I could only reach results about cropping the picture, but what I want is to delete the cropped part.
for example;The black part is the picture. The part I want to crop and delete in the red part
img-example

How do I make a vertical scrolling text in Javascript, something that typing text [closed]

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How do I animate a sentence, to scroll vertically, something like sort of css/JavaScript typing text animation with JavaScript, with infinite loop over the text

Trying to make a custom changeable background [closed]

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I want to make a changeable background with a button and menu like on the new tab page that google has can you help
Have the button click by setting an event listener to it
btn stands for the variable referencing the button element. It's just a personal preference, you can name the variable your choice.
btn.addEventListener("click", function(){
// code to be executed
}
Just have the button click set the class to the body tag.

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

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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

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

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