en.javascript.info/1-js/02-first-steps/13-switch/1-rewrite-switch-if-else/solution.md

To precisely match the functionality of switch, the if must use a strict comparison '==='.

For given strings though, a simple '==' works too.

if(browser == 'Edge') {
  alert("You've got the Edge!");
} else if (browser == 'Chrome'
 || browser == 'Firefox'
 || browser == 'Safari'
 || browser == 'Opera') {
  alert( 'Okay we support these browsers too' );
} else {
  alert( 'We hope that this page looks ok!' );
}

Please note: the construct browser == 'Chrome' || browser == 'Firefox' … is split into multiple lines for better readability.

But the switch construct is still cleaner and more descriptive.