Greasemonkey Click Button without ID or Name - automation

Question

I'm trying to autoclick this button with greasemonkey. I tried to find a reference to this button with document.getElementsBy[ClassName/Name/TagName] with ClassName i find buttons but not the one i need. Any ideas how i can automate his click-event?
<button type="button" class="ml-2 mt-2 v-btn v-btn--depressed theme--light v-size--default amber darken-1 white--text ">
::before
<span class="v-btn__content">
<!---->
Überspringen
<i aria-hidden="true" class="v-icon notranslate v-icon--right material-icons theme--light">
redo
::after
</i>
<!---->
</span>
</button>
Screenshot from Firefox Inspector with Click Function
Thanks in Advance!

Answer 1

Just use xpath for element searching:
document.evaluate(XPATH, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
You can use class parameter instead id or name:
xpath: //button[#class='ml-2 mt-2 v-btn v-btn--depressed theme....']
If you do not need to use all value, you can use contains keyword:
xpath:
//button[contains(#class, 'ml-2 m2-2')]
css:
button[class*='ml-2 m2-2']
Of course, this value must be unique.
You can search child element and return back to the parent:
//button/span[#class='v-btn__content']/i/../..
You can use text for searching (bad practics if location possible to change)
//button/span[text()='Überspringen']/..