JSFiddle - React, Tailwind, and code Playground

HTML

<input class="test" type="button" value='[type="button"]' />
<input class="test" type="reset" value='[type="reset"]' />
<input class="test" type="submit" value='[type="submit"]' />
<button class="test">[button]</button>
<br/>
<input class="test" type="file" value='[type="file"]' />

CSS

button::-moz-focus-inner,
input[type="reset"]::-moz-focus-inner,
input[type="button"]::-moz-focus-inner,
input[type="submit"]::-moz-focus-inner,
input[type="file"] > input[type="button"]::-moz-focus-inner
{
    padding: 0;
    border: 0
}

.test {
 background: grey;
 padding: 3px;
}