@babel/plugin-proposal-logical-assignment-operators
NOTE: This plugin is included in
@babel/preset-env
, in ES2021
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);
With Nullish Coalescing
While using the
@babel/plugin-proposal-nullish-coalescing-operator
plugin (included in@babel/preset-env
)
a ??= b; obj.a.b ??= c;
var _a, _obj$a, _obj$a$b; (_a = a) !== null && _a !== void 0 ? _a : (a = b); (_obj$a$b = (_obj$a = obj.a).b) !== null && _obj$a$b !== void 0 ? _obj$a$b : (_obj$a.b = c);
Installation
npm install --save-dev @babel/plugin-proposal-logical-assignment-operators
Usage
With a configuration file (Recommended)
{ "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").transformSync("code", { plugins: ["@babel/plugin-proposal-logical-assignment-operators"], });