<input id="testId" class="testClass" type="number">
<input id="testId" class="testClass" type="number">
...
<input id="testId" class="testClass" type="number">
<input name="test" class="testClass" type="number">
<input name="test" class="testClass" type="number">
<input name="test" class="testClass" type="number">
function getValues() {
const numbers = [];
const inputs = document.getElementsByName('test');
for (const input of inputs) {
numbers.push(Number(input.value));
}
return number;
}