Use
const declarations for variables that are never reassigned JS-0242
Anti-pattern
Minor
5 months ago
—
3 years old
'w' is never reassigned. Use 'const' instead
84}
85
86async function captureStdout(fn: any) {
87 let w = process.stdout.write,88 buffer = "";
89 process.stdout.write = (s) => {
90 buffer = buffer + s;
Description
Variables that are never re-assigned a new value after their initial declaration should be declared with the const keyword.
This prevents the programmer from erroneously re-assigning to a read-only variable, and informs those reading the code that a variable is a constant value.
Bad Practice
let pi = Math.PI
for (let x of xs) {
use(x);
}
let { a, b } = object;
use(a, b);
Recommended
const pi = Math.PI
for (const x of xs) {
use(x);
}
const { a, b } = object;
use(a, b);