@putout/plugin-simplify-ternary [![NPM version][NPMIMGURL]][NPMURL]

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[NPMURL]: https://npmjs.org/package/@putout/plugin-simplify-ternary "npm"

> The ternary operator takes three operands: a condition followed by a question mark (?), then an expression to execute if the condition is truthy followed by a colon (:), and finally the expression to execute if the condition is falsy. This operator is frequently used as an alternative to an if...else statement.
>
> (c) MDN

🐊Putout plugin adds ability to simplify ternary to logical expression when first and second operands are the same.

Install

``
npm i @putout/plugin-simplify-ternary -D
`

Rule

`json
{
"rules": {
"simplify-ternary/value": "on",
"simplify-ternary/spread": "on"
}
}
`

value

Check out in 🐊Putout Editor.

$3

`js
module.exports = fs.copyFileSync ? fs.copyFileSync : copyFileSync;

x = y ? y : z;
x = y ? z : y;
x = y ? z : false;

m = is ? a && b : a && c;
`

$3

`js
module.exports = fs.copyFileSync || copyFileSync;

x = y || z;
x = y && z;

m = a && is ? b : c;
`

spread

No need to use ternary when you can use logical expression (&&) it behaves in the same way, but simpler.

Check out in 🐊Putout Editor.

$3

`js
const a = {
...DEV ? {
devtool: 'eval',
} : {},
};
`

$3

`js
const a = {
...DEV && {
devtool: 'eval',
},
};
`

Comparison

Linter | Rule | Fix
--------|-------|------------|
🐊 Putout| simplify-ternary| ✅
⏣ ESLint | no-unneeded-ternary` | ⚠️ (partially: no MemberExpression, SpreadElement support)

License

MIT