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* Override the output of the submit button on forms, useful for
* adding custom classes or other attributes.
* @param string $button An HTML string of the default button
* @param array $form An array of form data
* @return string $button
* @filter gform_submit_button
function fjarrett_gform_submit_button( $button, $form ) {
$button = sprintf(
'<input type="submit" class="my-custom-class" id="gform_submit_button_%d" value="%s">',
absint( $form['id'] ),
esc_attr( $form['button']['text'] )
return $button;
add_filter( 'gform_submit_button', 'fjarrett_gform_submit_button', 10, 2 );

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@jorgept jorgept commented Sep 22, 2017

And add classes for text input fields?
Normal is the"length" of the field, medium, small, ...

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