Extended Numeric Literals

Search Terms

• extended-numeric-literals
• extended numeric literals

Suggestion

Support tc39/proposal-extended-numeric-literals (Stage 1)

Use Cases

For represent lengths in pixels, inches, degrees, radians, seconds and other units without calling specifically conversion methods in runtime (if this possible).

const time = 100s // transforms to `100,000` ms
const angle = 180° // transforms to `3.1415926536` radians

Examples

function deg(value: number): number {
   return value * (Math.PI / 180);
}

function °(value: number): number {
   return deg(value);
}

function _f32(value: number): number {
  return Math.fround(value);
}

function _u32(value: number): number {
  return value >>> 0;
}

function px(value: number): string {
  return `${ value }px`;
}

var angle = 30deg; // transforms to `0.5235987756`
const angle2 = 180°; // transforms to `pi` (`3.1415926536`)
let count = 1_000_000_u32;
var float32 = 1.0_f32;
canvas.style.width = 512px; // transforms to "512px" string

Also related to #15096

[MaxGraey]

This is already used with the arrival of BigInt. And with success has taken hold in such modern languages ​​like Rust, Ruby, Swift

[Shinigami92]

If this will land in JavaScript it should support by Typescript as well, isn’t it?

@MaxGraey Yes it is