send value from combobox to textarea

Question

I have a textarea

<textarea id="tarea" class="textarea" cols="15" rows="10" disabled></textarea>

and I want to send the values from my comboboxes to the textarea

<div class="form-group col-xl-7">

    <label>Livro</label>
    <div id="combo">

        <select id="comboLivros">
            <option class="option"></option>
        </select>

    </div>

    <br>

    <label>Proprietário a que se refere</label>
    <input type="text" id='prop_desc' disabled/>

    <br>

    <label>Pontuação</label>
    <select  id="seleciona">

    </select>
</div>

Those are my combobox that are filled with an array

I want when I select the comboboxes with the values i choose when I click on a button I want the textarea to be filled this is how I fill one of my combobox

var select = document.getElementById("seleciona");
var options = ["1", "2", "3", "4", "5"];
for (var i = 0; i < options.length; i++) {
    var opt = options[i];
    var el = document.createElement("option");
    el.textContent = opt;
    el.value = opt;
    select.appendChild(el);
}

this is how I fill one of my combobox

Answer 1

You can use event change of select to set value of textarea:

 var select = document.getElementById("seleciona"); var options = ["1", "2", "3", "4", "5"]; for (var i = 0; i < options.length; i++) { var opt = options[i]; var el = document.createElement("option"); el.textContent = opt; el.value = opt; select.appendChild(el); } var textarea = document.getElementById("tarea"); select.onchange = function(){ textarea.value = select.options[select.selectedIndex].value; } 

 <textarea id="tarea" class="textarea" cols="15" rows="10" disabled></textarea> <div class="form-group col-xl-7"> <label>Livro</label> <div id="combo"> <select id="comboLivros"> <option class="option"></option> </select> </div> <br> <label>Proprietário a que se refere</label> <input type="text" id='prop_desc' disabled/> <br> <label>Pontuação</label> <select id="seleciona"> </select> </div> 

I hope it help you.