how to use one line if javascript code example

Example 1: if statement javascript one line ?

(lemons) ? alert("please give me a lemonade") : alert("then give me a beer");

Example 2: javascript if one line

/* When width is <= 600 breakpoint is 1, when width is between 600 and 1000 breakpoint is 2, else is 4 */
let breakpoint = width <= 600 ? 1 : width <= 1000 && width > 600 ? 2 : 4; // Breakpoint observer code