Check if list contains value javascript -

i new javascript. codes, want return true if finds 'anna' in list

var userlist = [{'username':'anna','email':'anna@a.c'},                {'username':'benny','email':'benny@a.c'},                {'username':'kathy','email':'kathy@a.c'}]  return userlist.includes('anna') 

your appreciated

use some:

es6 syntax:

return userlist.some(user => user.username === 'anna'); 

es5 syntax:

function hasanna(user) {   return user.username === 'anna'; } return userlist.some(hasanna);