useDateNow
Summary
Section titled “Summary”- Rule available since:
v1.8.0 - Diagnostic Category:
lint/complexity/useDateNow - This rule is recommended, which means is enabled by default.
- This rule has an unsafe fix.
- The default severity of this rule is warning.
- Sources:
- Same as
unicorn/prefer-date-now
- Same as
Description
Section titled “Description”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 “Examples”Invalid
Section titled “Invalid”const foo = new Date().getTime();code-block.js:1:13 lint/complexity/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 Date object.
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/complexity/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 Date object.
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/complexity/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 Date object.
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/complexity/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 Date object.
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/complexity/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 Date object.
ℹ Unsafe fix: Replace with Date.now().
1 │ - const·foo·=·new·Date()·*·2;
1 │ + const·foo·=·Date.now()*·2;
2 2 │
const foo = Date.now();const foo = Date.now() * 2;How to configure
Section titled “How to configure”{ "linter": { "rules": { "complexity": { "useDateNow": "error" } } }}