将值从 javascript 传递给 html 和 codeigniter

Question

i using hidden's input

<input type='hidden' name='bahan' id='bahan' />

then, i want pass a value from js. i have a function called resultBtn() i get the value from it, example string var x='12,124'; i want take the value from other input

<?php $i=0; foreach ($bahanx as $pin2){ 
  echo "<div class='input-group' style='width:175%'><label class='input-group-addon' style='width:100px'><input type='checkbox' name='bahan' aria-label='Checkbox for following text input' value='".$pin2->id_barang."' oninput='changeText(this,".$i.");' > ". $pin2->nama_barang ."</label><input type='text' class='form-control' aria-label='Text input with checkbox' name='banyak_bahan' value='0' disabled/></div><br/>";
  $i++;  }  ?>

at resultBtn() i make a formula from bahanx then the result is x variable. this is my js

document.getElementsByName('bahan').value=x;

Answer 1

The getElementsByName method returns a collection of elements( NodeList ) so you need to retrieve element by index.

document.getElementsByName('bahan')[0].value = x;
//                           ------^^^------