useDateNow (since v1.8.0)
Diagnostic Category: lint/nursery/useDateNow
Sources:
- Same as:
unicorn/prefer-date-now
Use Date.now() to get the number of milliseconds since the Unix Epoch.
Date.now() is more readable than new Date().getTime() and its variants,
it also avoids unnecessary instantiation of Date object.
Examples
Section titled ExamplesInvalid
Section titled Invalidconst foo = new Date().getTime();code-block.js:1:13 lint/nursery/useDateNow FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Use Date.now() instead of new Date().getTime.
> 1 │ const foo = new Date().getTime();
│ ^^^^^^^^^^^^^^^^^^^^
2 │
ℹ Date.now() is more readable and also avoids unnecessary instantiation of Dateobject.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·new·Date().getTime();
1 │ + const·foo·=·Date.now();
2 2 │
const foo = new Date().valueOf();code-block.js:1:13 lint/nursery/useDateNow FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Use Date.now() instead of new Date().valueOf.
> 1 │ const foo = new Date().valueOf();
│ ^^^^^^^^^^^^^^^^^^^^
2 │
ℹ Date.now() is more readable and also avoids unnecessary instantiation of Dateobject.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·new·Date().valueOf();
1 │ + const·foo·=·Date.now();
2 2 │
const foo = +new Date();code-block.js:1:13 lint/nursery/useDateNow FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Use Date.now() instead of new Date().
> 1 │ const foo = +new Date();
│ ^^^^^^^^^^^
2 │
ℹ Date.now() is more readable and also avoids unnecessary instantiation of Dateobject.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·+new·Date();
1 │ + const·foo·=·Date.now();
2 2 │
const foo = Number(new Date());code-block.js:1:13 lint/nursery/useDateNow FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Use Date.now() instead of Number(new Date()).
> 1 │ const foo = Number(new Date());
│ ^^^^^^^^^^^^^^^^^^
2 │
ℹ Date.now() is more readable and also avoids unnecessary instantiation of Dateobject.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·Number(new·Date());
1 │ + const·foo·=·Date.now();
2 2 │
const foo = new Date() * 2;code-block.js:1:13 lint/nursery/useDateNow FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠ Use Date.now() instead of new Date().
> 1 │ const foo = new Date() * 2;
│ ^^^^^^^^^^
2 │
ℹ Date.now() is more readable and also avoids unnecessary instantiation of Dateobject.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·new·Date()·*·2;
1 │ + const·foo·=·Date.now()*·2;
2 2 │
Valid
Section titled Validconst foo = Date.now();const foo = Date.now() * 2;