SO-71909623

by David Thomas

HTML

<ul>
  <li class="inputValue">
    <textarea>1, 2300,450, 2, 2200, 920,3, 3400, 440</textarea>
    <button type="button">format</button>
  </li>
</ul>

CSS

*,
::before,
::after {
  box-sizing: border-box;
  font-family: sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

ul,
li {
  list-style-type: none;
  padding: 1em;
}

li {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  justify-content: space-between;
}

textarea {
  min-height: 40vmin;
  width: 100%;
}

JavaScript

const getResults = (evt) => {
    let button = evt.currentTarget,
      ancestor = button.closest('li'),
      textarea = ancestor.querySelector('textarea'),
      entry = textarea.value || textarea.textContent,
      haystack = entry.split(/,/).map((v) => v.trim()),
      result = haystack.reduce(
        (acc, curr, index) => {
          if (index % 3 === 0) {
            let [person, posX, posY] = [...haystack].splice(index, 3);
            acc.push({
              person,
              posX,
              posY
            });
          }
          return acc
        }, []);
    console.log(result);
  },
  buttons = document.querySelectorAll('button[type=button]');

buttons.forEach(
  (btn) => btn.addEventListener('click', getResults)
);