[rlkf]

    (x === 1) && console.log("it's 1")

Note that you've saved exactly no keystrokes, although this is composable into expressions (if you are using some Javascript-derivative; in ML it would typically already be using the if-form).

[eacnamn]

((x == 1)) && printf 'it'"'"'s 1\n' although I'm not sure how useful this actually is, but it is a nice-to-know

[andrewstuart]

or

x === 1 && console.log("it's 1");