Clean Code in JavaScript

Multivariant conditions

Often, there's a need to express more complex conditions in each case, instead of just matching a singular value. If we pass true as SwitchExpression, then we are free to express custom conditional logic within each CaseExpression, as long as each CaseExpression evaluates to true when successful:

switch (true) {  case user.role === 'admin' || user.role === 'root': {    // ...    break;  }  case user.role === 'member' && user.isActive: {    // ...    break;  }  case user.role === 'member' && user.isRecentlyInactive: {    // ...    break;  }}

This pattern allows us to express more multivariate and hybrid conditions. You may usually feel inclined toward multiple if/else/if/else statements, but if your logic can be expressed in a switch statement, ...