babel-plugin-transform-numeric-separator
This plugin allows Babel to transform Decimal, Binary, Hex and Octal literals containing Numeric Literal Separator to their non-separated form.
Example
Decimal Literals
let budget = 1_000_000_000_000; // What is the value of `budget`? It's 1 trillion!// // Let's confirm:console; // true
Binary Literals
let nibbles = 0b1010_0001_1000_0101; // Is bit 7 on? It sure is!// 0b1010_0001_1000_0101// ^// // We can double check: console; // true
Hex Literal
// Messages are sent as 24 bit values, but should be // treated as 3 distinct bytes:let message = 0xA0_B0_C0; // What's the value of the upper most byte? It's A0, or 160.// We can confirm that:let a = message >> 16 & 0xFF; console; // a0, 160 // What's the value of the middle byte? It's B0, or 176.// Let's just make sure...let b = message >> 8 & 0xFF;console; // b0, 176 // What's the value of the lower most byte? It's C0, or 192.// Again, let's prove that:let c = message & 0xFF;console; // c0, 192
Octal Literal
hand wave emoji
Octals are great for permissions, but also look better when represented in 0o0000
form. No real benefit with separators here.
Installation
npm install --save-dev babel-plugin-transform-numeric-separator
Usage
.babelrc
(Recommended)
Via .babelrc
Via CLI
babel --plugins transform-numeric-separator script.js
Via Node API
;
Additional Information
If you need to further compile ES2015 Decimal, Binary, Hex and Octal number representations to their pre-ES2015 numeric literal form, add the "transform-es2015-literals"
plugin:
transform-es2015-literals
is already included in babel-preset-env and babel-preset-es2015.
.babelrc
(Recommended)
Via .babelrc