Code input method

code-input-method.markdown

Code input method

Interesting method to take pin code inputs idea taken from https://stackoverflow.com/a/76267345/1945990 and developed.

A Pen by Michael Watts on CodePen.

License.

index.html

<div class="container">
  <div class="box-code-container">
    <input id="code-input" type="text" name="box-code" class="box-code-input" maxlength="6" title="Input code" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"pattern="[a-z][A-Z][0-9]" autofocus />
    <div class="cell">
    </div>
    <div class="cell">
    </div>
    <div class="cell">
    </div>
    <div class="cell">
    </div>
    <div class="cell">
    </div>
    <div class="cell">
    </div>
  </div>
  
  <button id="submit-button" class="button" disabled>Submit</button>
</div>

script.typescript

document.addEventListener("DOMContentLoaded", function () {
  var codeInput = document.querySelector("#code-input");
  var submitButton = document.querySelector("#submit-button");

  function handleInput() {
    if (codeInput.value.length >= 6) {
      codeInput.blur(); // Blur the input so cursor doesn't hang outside boxes
      submitButton.disabled = false;
      submitButton.focus();
    } else {
      submitButton.disabled = true;
    }
  }

  codeInput.addEventListener("input", handleInput);

  codeInput.addEventListener("paste", function (event) {
    setTimeout(handleInput, 0);
  });
});

style.css

body {
  height: 90vh;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.box-code-container {
  display: grid;
  grid-template-columns: repeat(6, 2ch);
  grid-template-rows: 1fr;
  gap: 0px 1ch; 
  position: relative;
  font-family: monospace;
  font-size: 2.5rem;
  height: 100px;
  align-items: center;
}

.box-code-input {
  position: absolute;
  top: 0;
  left: .5ch;
  right: -2ch;
  height: 100px;
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  padding: 0;
  letter-spacing: 2ch;
  color: grey;
  background: transparent;
  width: 18ch;
  user-select: none;
  opacity: .5;
  transition: opacity .2s ease-in-out;
}

.box-code-input:focus {
  opacity: 1;
  color: rebeccapurple;
}

.box-code-input::selection {
  background-color: transparent;
}

.cell {
  outline: 2px solid grey;
  width: 2ch;
  height: 3ch;
  z-index: -1;
  border-radius: 5px;
}

.button {
  background: rebeccapurple;
  color: white;
  font-size: 1.5rem;
  padding: .75rem 2rem;
  border-radius: 5px;
  transition: opacity .2s ease-in-out;
  border: none;
}

.button:active,
.button:focus,
.button:focus-visible {
  outline: 3px solid #66339982;
}

.button:disabled {
  opacity: .5;
}