Necesito definir una entrada de radio con Name='status' y Value='X' en un formulario con id='A'. Al igual que la configuración seleccionada, en un Valor = 'X' en un formulario con id = 'B'.
document.querySelector("form[id='A'] input[name='status'][value=1]").checked = true; document.querySelector("form[id='B'] select[id='cars'][value=volvo]").selected = true; document.querySelector("form[id='C'] input[name='status'][value=2]").checked = true; <form id='A'> FROM A - Radio Test checked: <br> Value 1 <input type='radio' name='status' value='1' /> <br> Value 2 <input type='radio' name='status' value='2' /> <br> Value 3 <input type='radio' name='status' value='3' /> </form> <hr> <form id='B'> FROM B - Select Test selected: <br> <select id="cars"> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="vw">VW</option> <option value="audi" selected>Audi</option> </select> </form> <hr> <form id='C'> FROM C - Radio Test checked: <br> Value 1 <input type='radio' name='status' value='1' /> <br> Value 2 <input type='radio' name='status' value='2' /> <br> Value 3 <input type='radio' name='status' value='3' /> </form>Prueba esto
document.querySelector("form[id='A'] input[name='status'][value='1']").checked = true;en lugar de esto
document.querySelector("form[id='A'] input[name='status'][value=1]").checked = true;tienes que cotizar el valor