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* Proposal: Logical Assignment Operators https://github.com/jridgewell/proposal-logical-assignment I'm bringing it [back](https://github.com/babel/babel/pull/516). 😉 * Use expectPlugin * Add to stage 0 preset * Add logicalAssignment missing plugin log stuff
@babel/plugin-proposal-logical-assignment-operator
Transforms logical assignment operators into short-circuited assignments
Example
In
a ||= b;
obj.a.b ||= c;
a &&= b;
obj.a.b &&= c;
Out
var _obj$a, _obj$a2;
a || (a = b);
(_obj$a = obj.a).b || (_obj$a.b = c);
a && (a = b);
(_obj$a2 = obj.a).b && (_obj$a2.b = c);
Installation
npm install --save-dev @babel/plugin-proposal-logical-assignment-operators
Usage
Via .babelrc (Recommended)
.babelrc
{
"plugins": ["@babel/plugin-proposal-logical-assignment-operators"]
}
Via CLI
babel --plugins @babel/plugin-proposal-logical-assignment-operators script.js
Via Node API
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-proposal-logical-assignment-operators"]
});