How to add Drop-Down list (<select>) programmatically?

Question

I want to create a function in order to programmatically add some elements on a page.

Lets say I want to add a drop-down list with four options:

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Answer 1

const cars = ['Volvo', 'Saab', 'Mervedes', 'Audi'];

let domSelect = document.createElement('select');
domSelect.multiple = true;
document.getElementsByTagName('body')[0].appendChild(domSelect);


for (const i in cars) {
  let optionSelect = document.createElement('option');

  let optText = document.createTextNode(cars[i]);
  optionSelect.appendChild(optText);

  document.getElementsByTagName('select')[0].appendChild(optionSelect);
}