Named Boolean Expressions

booleans.js

// before named boolean expressions
// check if the user is active and if the user has
// dependents
if (user.status === 'active' && 
     user.dependents.length > 1) {
    // perform something important
}

// before
if (!user.authenticated) {
    // take special action
}




// after named boolean expressions
const userIsActiveWithDependents = user.status === 'active' &&
                                                            user.dependents.length > 1;
if (userIsActiveWithDependents) {
    // perform something important
}

// after
const userIsUnauthenticated = user.authenticated == false;
if (userIsUnauthenticated) {
    // take special action
}