Qual seria uma forma de validar o campo do texto assim que o botão for clicado?
Se o campo não for preenchido, e o usuário for clicar no botão ele emite um alerta e não deixaria o formulário ser enviado e iria mostrar qual campo está em branco e faltando o preenchimento.
<form> <fieldset> <legend>Teste</legend> Informe seu nome: <input tpye="text" size="10"> <p> <input type="submit" value="Validar"> </fieldset> </form>
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