Found shorthand type coercions JS-0066
Anti-pattern
Minor
5 months ago
—
5 months old
use
String(d.getDate()) instead153 if (!date) return '';
154 const d = new Date(date),
155 month = '' + (d.getMonth() + 1),
156 day = '' + d.getDate(),157 year = d.getFullYear();
158
159 return [pad(day, 2), pad(month, 2), year].join('.');use
String(d.getMonth() + 1) instead152function formatDate(date: Date) {
153 if (!date) return '';
154 const d = new Date(date),
155 month = '' + (d.getMonth() + 1),156 day = '' + d.getDate(),
157 year = d.getFullYear();
158use
String(num) instead144);
145
146function pad(num: string, size: number): string {
147 let s = num + "";148 while (s.length < size) s = "0" + s;
149 return s;
150}
Description
Prefer using explicit casts by calling Number, Boolean, or String over using operators like +, !! or "" +.
This is considered best practice as it improves readability.
Bad Practice
const b = !!foo;
// The `+` operator does not change the value of its operand
// unless it's already a number.
let n = +foo;
n = 1 * foo;
const s = "" + foo;
Recommended
const b = Boolean(foo);
const n = Number(foo);
const s = String(foo);