從組合框發送值到textarea

Question

我有一個文本區域

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

我想將組合框中的值發送到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>

這些是我的組合框，里面充滿了數組

當我選擇帶有單擊按鈕時選擇的值的組合框時，我想要填充文本區域，這就是我填充其中一個組合框的方式

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);
}

這就是我填充我的組合框之一的方式

Answer 1

您可以使用select的事件更改來設置textarea的值：

 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> 

希望對您有幫助。