javascript - Shorten JS if or statement -

this question has answer here:

• how check if array includes object in javascript? 38 answers

is there anyway shorten in javascript: if (x == 1 || x == 2 || x == 3 || x == 4) if (x == (1 || 2 || 3 || 4)) ?

you can use use array.indexof

[1,2,3,4].indexof(x) !== -1 

you can use objects kind of hash map:

//note: keys coerced strings // don't use method if looking object or if need // distinguish number 1 string "1" my_values = {1:true, 2:true, 3:true, 'foo':true} my_values.hasownproperty('foo') 

---

by way, in cases should usi "===" strict equality operator instead of == operator. comparison using "==" may lots of complicated type coercion , can surprising results sometimes.