chromium/third_party/blink/renderer/core/testing/data/text_input_flags.html

<input id="input" spellcheck="false" autocorrect="off" autocomplete="off" autocapitalize="none"></input>
<input id="input2" spellcheck="true" autocorrect="on" autocomplete="on" autocapitalize="sentences"></input>
<textarea id="textarea"></textarea>