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¿Por qué la función "showPass" devuelve nulo?

Estoy tratando de escribir una función pero tengo algunos errores. Mi función "showPass" está devolviendo nulo

 <input id="userid" type="password" value="12345"> <button id="showPassButton" onclick="showPass(userid, showPassButton)">Show</button> <script> function showPass(passId, btnId) { const pass = document.getElementById('passId'); console.log(pass); const btn = document.getElementById('btnId'); console.log(btn); } </script>
about 4 years ago · Juan Pablo Isaza
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Debe usar onclick="showPass('userid', 'showPassButton')"> en lugar de onclick="showPass(userid, showPassButton)"> porque getElementById requiere una cadena. Tome el siguiente fragmento como referencia.

 function showPass(passId, btnId) { const pass = document.getElementById(passId); console.log(pass); const btn = document.getElementById(btnId); console.log(btn); }
 <input id="userid" type="password" value="12345"> <button id="showPassButton" onclick="showPass('userid', 'showPassButton')">Show</button>

about 4 years ago · Juan Pablo Isaza Report
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