Code Fragmente Javascript

// Iterating over objects
const unknownObject = { /* ... */ }
 
for (const [ key, value ] of Object.entries(unknownObject)) {
  // unbekantes Obejkt richtig coden
}
 
//Omitting unneeded values by just using some commas:
const [,, month] = '2018-07-31'.match(/^[0-9]{4}.([0-9]{2}).[0-9]{2}$/)
 
 
// You can also clone an array with destructuring:
const arr = ["one", "two"];
const clone = [...arr];
 
function myFunction(text = "", line = 0, truncate = 100) {
 
    // With default values, we can avoid a bunch of:
    text = text || "";
    line = line || 0;
    truncate = truncate || 100;
}
const { x: otherName } = obj;
const User = {
    name: 'John Doe',
    age: 30
};
const { name: fullName, age: userAge } = User;