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Destructuring Assignment (ES6)
const customer = { age: 25, name: "Peter" } const age = customer.age const name = customer.name console.log(age) /* 25 */ console.log(name) /* Peter */
Có thể viết lại theo cách khác
const age = 40;
const customer = {
age: 25,
name: "Peter"
}
const {age: customerAge, name} = customer
console.log(age) /* 40 */
console.log(customerAge) /* 25 */
console.log(name) /* Peter */- Rest parameter vs spread syntax
Bên Java thì gọi là varargs (variable arguments)
function sum(...theArgs) {
let total = 0;
for (const arg of theArgs) {
total += arg;
}
return total;
}
console.log(sum(1, 2, 3));
// expected output: 6
console.log(sum(1, 2, 3, 4));
// expected output: 10- Template literals
const Ref:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax