Change the value of the innerText property:

element.innerText = 'x'

To look up the element, combine it with the Selectors API:

document.querySelector('#today .total')

Lessons in this unit:

0:	Introduction
1:	The `window` object
2:	The `document` object
3:	Types of nodes
4:	Traversing the DOM
5:	Editing the DOM
6:	Selectors API
7:	DOM Ready
8:	Add a class to an element
9:	Remove a class from an element
10:	Check if element has a class
11:	▶︎ Change a DOM node value
12:	Loop through DOM elements
13:	Add an image to the DOM
14:	Create a DOM attribute
15:	Remove children elements
16:	Replace a DOM element
17:	insertAdjacentHTML
18:	Add click events to a list