org.sonar.l10n.javascript.rules.javascript.S4138.html Maven / Gradle / Ivy
Why is this an issue?
for...of statements are used to iterate over the values of an iterable object. Iterables are objects
implementing the @@iterator method, which returns an object conforming to the iterator protocol. JavaScript
provides many built-in
iterables that can and should be used with this looping statement.
The use of the for...of statement is recommended over the for statement when iterating through iterable objects as
simplifies the syntax and eliminates the need for a counter variable.
const arr = [4, 3, 2, 1];
for (let i = 0; i < arr.length; i++) { // Noncompliant: arr is an iterable object
console.log(arr[i]);
}
When looping over an iterable, use the for...of for better readability.
const arr = [4, 3, 2, 1];
for (let value of arr) {
console.log(value);
}
Resources
Documentation
- MDN web docs -
for...of
- MDN web docs - Iterator
protocol