<form action="" method="POST">

      <div class="uk-flex-column">
        <label for="entry">Сообщение *: </label>

        <div class="item-block">
          <textarea name="entry" id="entry" required="required" rows="7" onkeyup="commFns.countChars.call(this, $('#maxLen')[0], event)"></textarea>
        </div>
      </div>

      <div>
        <!-- <div class="min700 name">Имя : </div> -->
        <label for="name">Имя</label>
        <input type="text" class="item-block" name="name" id="name" value="" placeholder="Имя">
      </div>

      <div>
        <label for="email">Почта * (для обратной связи) : </label>
        <input type="text" class="item-block" required="required" name="email" id="email" value="" placeholder="email">
      </div>

      <div class="right uk-margin">
        <input id="c_subm" type="button" class="button uk-width-expand" value="Добавить">
      </div>

      <h6 class="uk-margin-remove uk-text-center uk-h4">По желанию:</h6>
      <!-- <p style="margin: 0;text-align: center;" class="bold">По желанию:</p> -->

      <div class="uk-flex-wrap uk-flex-between">
        <div>
          <label for="tg" class="uk-width-1-3 uk-display-inline-block">Телеграм</label>
          <input type="text" class="item-block" name="tg" id="tg" value="" placeholder="@NicName">
        </div>
        <div>
          <label for="Site" class="uk-width-1-3 uk-display-inline-block">Сайт</label>
          <input type="text" class="item-block" name="Site" id="Site" value="" placeholder="http://site.net">
        </div>
        <div>
          <label for="CMS" class="uk-width-1-3 uk-display-inline-block">CMS</label>
          <input type="text" class="item-block" name="CMS" id="CMS" value="">
        </div>

      </div>
    </form>

<hr>
<h1>TEST</h1>
<button onclick="F.save()">Сохранить</button>
<button onclick="F.restore()">Восстановить</button>

var F={
  save: ()=>{
    var form= document.querySelector('form'),
    formData = [].reduce.call(form.querySelectorAll('input,select,textarea'), (a,c)=>{
      if(!c.name) return a;
      a[c.name]= [c.tagName, c.value, c.placeholder];
      return a;
    }, {});

localStorage.setItem('myForm', JSON.stringify(formData));

// console.log(localStorage.getItem('myForm'));
    form.remove();
  },
  
  restore: ()=>{
    var fNode= document.createElement('form'),
    form= JSON.parse(localStorage.getItem('myForm'));
    Object.keys(form).forEach(i=>{
      var node= document.createElement(form[i][0]);
      fNode.append(node);
      node.name= i;
      node.value= form[i][1];
      node.placeholder= form[i][2];
    });
    document.body.append(fNode);
  }
}