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Robert Reiz
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My pragmatic solution for right is this:
<%= f.submit :class => "btn btn-primary brndc",
:value => t('general.btn_update'),
:onclick => "this.form.submit(); this.disabled=true; this.value='Sending…';" %>
I exactly followed the example, but it doesn't work for me. The form is submitted but the button is not disabled and the text is not changing. Do I miss some JS magic? Any ideas?