inline else if javascript code example

Example 1: how to make one line if in js

// If statement
// if (condition) //code
if (5 > 3) return "Is greater"; // "Is greater"

// If else statement
// (condition) ? if : else
let res = (1 > 3) ? "is greater" : "is less than";// "is less than"

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