etype
Extra types for TypeScript.
Most of the time we can be sure that the type of a variable is int. However, there is no int type in TypeScript, so we have to write code with comment like this:
/** age is int */
const age: number;Is there a better way? Of course! We can define a type alias like this:
type int = number;
const age: int;In this way, although we can not limit the type of value of age, it makes the code more readable.
Based on this idea, we provides some extra types for TypeScript.
Usage
Install:
npm install etype --save-devImport in your ts files:
import type { int } from 'etype';
const age: int;Import in Deno:
import type { int } from 'https://deno.land/x/etype/mod.ts';
const age: int;Types
| Type | Description | Example | Real Type |
|---|---|---|---|
int |
32-bit signed two's complement integer, which has a minimum value of -2^31 and a maximum value of 2^31-1 |
0, 1, 2, -1, -2147483648, 2147483647
|
number |
float |
Single-precision 32-bit IEEE 754 floating point |
0.1, -1.23
|
number |
IntString |
Int-like-string |
"100", "-1"
|
string |
FloatString |
Float-like-string |
"1.00", "-0.1"
|
string |
DateString |
Date-like-string which can be converted to Date object by new Date(foo)
|
"Mon, 19 Oct 2020 13:09:21 GMT", "2020-09-10 17:28:35"
|
string |
JSONString |
JSON-string which can be converted to json object by JSON.parse(foo)
|
"{\"hello\":\"world\"}" |
string |
BooleanInt |
Use int to represent a boolean |
0, 1
|
0 | 1 |
AnyFunction |
Represent to any function | / | (...args: any[]) => any |
Contributing
- Search issues before ask a question
- For feature request, submit an issue before create a pull request
- Run
npm run buildto compileindex.ts - utility-types should be maintained in their repository