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dateNowTimestamps

Prefer the shorter Date.now() to get the number of milliseconds since the Unix Epoch.

✅ This rule is included in the ts logical and logicalStrict presets.

Date.now() is shorter and more efficient than alternatives like new Date().getTime() because it avoids unnecessary instantiation of Date objects.

This rule reports patterns that create a Date object only to immediately extract the timestamp, such as:

  • new Date().getTime()
  • new Date().valueOf()
  • +new Date()
  • Number(new Date())

Examples

Section titled “Examples”
const 
const timestamp: number
timestamp = new 
var Date: DateConstructor
new () => Date (+3 overloads)
Date().
Date.getTime(): number
Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC.
getTime();
const 
const timestamp: number
timestamp = new 
var Date: DateConstructor
new () => Date (+3 overloads)
Date().
Date.valueOf(): number
Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC.
valueOf();
const 
const timestamp: number
timestamp = +new 
var Date: DateConstructor
new () => Date (+3 overloads)
Date();
const 
const timestamp: number
timestamp = 
var Number: NumberConstructor
(value?: any) => number
An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers.
Number(new 
var Date: DateConstructor
new () => Date (+3 overloads)
Date());

Options

Section titled “Options”

This rule is not configurable.

When Not To Use It

Section titled “When Not To Use It”

If your codebase intentionally uses new Date().getTime() or similar patterns for stylistic consistency, you may disable this rule. Some older codebases may prefer the more explicit instantiation pattern.

Further Reading

Section titled “Further Reading”

Equivalents in Other Linters

Section titled “Equivalents in Other Linters”
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