@babel/plugin-check-constants
Validate ES2015 constants (prevents reassignment of const variables).
Example
In
const a = 1;
a = 2;
Out
repl: "a" is read-only
1 | const a = 1;
> 2 | a = 2;
| ^
Installation
npm install --save-dev @babel/plugin-check-constants
Usage
Via .babelrc
(Recommended)
.babelrc
{
"plugins": ["@babel/check-constants"]
}
Via CLI
babel --plugins @babel/check-constants script.js
Via Node API
require("@babel/core").transform("code", {
plugins: ["@babel/check-constants"]
});
Note
This check will only validate consts. If you need it to compile down to var
then you must also install and enable @babel/plugin-transform-block-scoping
.