focus_next_field/index.html at master · atthijs98/focus_next_field · GitHub

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<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <input tabindex="1" placeholder="1">
    <input tabindex="2" placeholder="2" style="display: none">
    <input tabindex="3" placeholder="3" style="display:none">
    <input tabindex="4" placeholder="4">
    <input tabindex="5" placeholder="5">
</body>
<script>
let inputs = document.querySelectorAll("input[tabindex],select[tabindex],textarea[tabindex]");
for (let i = 0; i < inputs.length; i++) {
inputs[i].addEventListener("keypress", function(e) {
if (e.which == 13) {
  e.preventDefault();
  let nextInput = document.querySelectorAll('[tabindex="' + (this.tabIndex + 1) + '"]');
  let index = (nextInput > 1) ? nextInput.length-1 : 0;
  if (nextInput.length === 0) {
    console.log("Last!");
    nextInput = document.querySelectorAll('[tabindex="1"]');
  } else if (nextInput[index].style.display !== "none" && nextInput.length !== 0) {
    console.log("Ja");
  } else {
    let counter = [];
    console.log("Nee");
    for (let j = 1; j < inputs.length; j++) {
        nextInput = document.querySelectorAll('[tabindex="' + (this.tabIndex + j) + '"]');
        index = (nextInput > 1) ? nextInput.length-1 : 0;
      if (nextInput[index].style.display !== "none" && nextInput.length !== 0) {
        console.log("Match!");
        counter.push(j);
        break;
      }
    }
    nextInput = document.querySelectorAll('[tabindex="' + (this.tabIndex + counter[0]) + '"]');
    counter = [];
  }
  nextInput[index].focus();
}
})
}
</script>
</html>