Load values after changing combobox(Select)

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Like selecting the value of a combobox at the same time some textbox are loaded? It’s a user edition. I know this should be done in JS, someone could tell me how?

javascript php

  • http://answall.com/questions/14646/howto select-uma-opcao-em-um-select-e-carregar-relateddata

  • Tried using ajax? Or you can upload all the database information before and only fill in the elements with js.

  • Have you ever tried something? Are they fixed texts or dynamic information? The more complete you are in your question the better the answer you get.

  • Leandro, the textbox you want to load has data from a database or only new textbox to be filled by the user?

1 answer

0

Considering that the value of the dropdown menu should be captured and, from it, the script should decide what to do, I set the following example. Just adapt to your needs.

<!DOCTYPE html>
<html>
    <head>
        <title>Atualização com JS puro</title>
        <meta charset="UTF-8" />
    </head>
    <body>
        <select id="selecao">
            <option value="1ª opção" selected>Primeira opção aqui</option>
            <option value="2ª opção">Segunda opção aqui</option>
            <option value="personalizar">Personalizar</option>
        </select>
        <input id="caixa1" type="text" />
        <div id="div_personalizar" style="visibility: hidden;">
            <input type="radio" name="radios" checked /> Opção padrão
            <input type="radio" name="radios" /> Opção escondida
        </div>
        <script>
            // Selecionamos o menu dropdown, que possui os valores possíveis:
            var menu_dropdown = document.getElementById("selecao");

            // Requisitamos que a função handler (que copia o valor selecionado para a caixa de texto) [...]
            // [...] seja executada cada vez que o valor do menu dropdown mude:
            menu_dropdown.addEventListener("change", function(){

                // Como este código é executado após cada alteração, sempre obtemos o valor atualizado:
                var valor_selecionado = menu_dropdown.options[menu_dropdown.selectedIndex].value;

                // Altere este código se desejar resultados mais complexos:
                if(valor_selecionado == "personalizar"){
                    document.getElementById("div_personalizar").style.visibility = "";
                } else {
                    document.getElementById("caixa1").value = valor_selecionado;
                    document.getElementById("div_personalizar").style.visibility = "hidden";
                }

            });
            // Opcional: copia o valor inicial. Sem essa linha, a caixa de texto inicia vazia.
            document.getElementById("caixa1").value = menu_dropdown.options[menu_dropdown.selectedIndex].value;
        </script>
    </body>
</html>

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