13-random-choice-picker

html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./style.css">
    <title>Document</title>
</head>
<body>
    <div class="container">
        <h3>Enter all of the choices divided by a comma (','). <br></h3>
        <textarea id="textarea"  cols="30" rows="10" placeholder="Enter choices here..."></textarea>
        <div id="tags"></div>
    </div>
    <script src="./script.js"></script>
</body>
</html>

css

@import url('https://fonts.googleapis.com/css?family=Muli&display=swap');

* {
  box-sizing: border-box;
}

body{
    background-color: #2b88f0;
    font-family: 'Muli',sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    margin: 0;
}

h3{
    color: #fff;
    margin: 10px 0 20px;
    text-align: center;
}

.container{
    width: 500px;
}

textarea{
    border: none;
    display: block;
    width: 100%;
    height: 100px;
    font-family: inherit;
    padding: 10px;
    margin: 0 0 20px;
    margin: 0 0 20px;
    font-size: 16px;
}

textarea:focus{
    outline: none;
}

.tag{
    background-color: #f0932b;
    color: #fff;
    border-radius: 50px;
    padding: 10px 20px;
    margin: 0 5px 10px 0;
    font-size: 14px;
    display: inline-block;
}

.tag.highlight{
    background-color: #273c75;
}

const tagsEl =document.getElementById('tags')
const textarea = document.getElementById('textarea')


textarea.focus()

textarea.addEventListener('keyup',(e)=>{
    createTags(e.target.value)
    if(e.key === 'Enter'){
        setTimeout(()=>{
            e.target.value = ''
        },10)
        randomSelect()
    }
})

function createTags(input){
    const tags = input.split(',').filter(tag=>tag.trim()!=='').map(tag=>tag.trim())

    tagsEl.innerHTML=''
    tags.forEach(tag=>{
        const tagEl=document.createElement('span')
        tagEl.classList.add('tag')
        tagEl.innerHTML=tag
        tagsEl.appendChild(tagEl)
    })
}

function randomSelect(){
    const times = 30
    const interval = setInterval(()=>{
        const randomTag = pickRandomTag()
        if(randomTag!==undefined){
            highlightTag(randomTag)
            setTimeout(()=>{
                unHighlightTag(randomTag)
            },100)
        }
    },100)


    setTimeout(()=>{
        clearInterval(interval)
        setTimeout(()=>{
            const randomTag = pickRandomTag()
            highlightTag(randomTag)
        },100)
    },times*100)
}

function pickRandomTag(){
    const tags = document.querySelectorAll('.tag')
    return tags[Math.floor(Math.random() * tags.length)]
}

function highlightTag(tag){
    tag.classList.add('highlight')
}

function unHighlightTag(tag){
    tag.classList.remove('highlight')
}