babel-preset-expo
Version:
The Babel preset for Expo projects
74 lines (73 loc) • 2.91 kB
JavaScript
;
/**
* Copyright © 2024 650 Industries.
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = minifyPlatformSelectPlugin;
const core_1 = require("@babel/core");
function minifyPlatformSelectPlugin({ types: t, }) {
return {
visitor: {
CallExpression(path, state) {
const node = path.node;
const arg = node.arguments[0];
const opts = state.opts;
if (isPlatformSelect(path) && core_1.types.isObjectExpression(arg)) {
if (hasStaticProperties(arg)) {
let fallback;
if (opts.platform === 'web') {
fallback = () => findProperty(arg, 'default', () => t.identifier('undefined'));
}
else {
fallback = () => findProperty(arg, 'native', () => findProperty(arg, 'default', () => t.identifier('undefined')));
}
path.replaceWith(findProperty(arg, opts.platform, fallback));
}
}
},
},
};
}
function isPlatformSelect(path) {
return (core_1.types.isMemberExpression(path.node.callee) &&
core_1.types.isIdentifier(path.node.callee.object) &&
core_1.types.isIdentifier(path.node.callee.property) &&
path.node.callee.object.name === 'Platform' &&
path.node.callee.property.name === 'select' &&
core_1.types.isObjectExpression(path.node.arguments[0]));
}
function findProperty(objectExpression, key, fallback) {
let value = null;
for (const p of objectExpression.properties) {
if (!core_1.types.isObjectProperty(p) && !core_1.types.isObjectMethod(p)) {
continue;
}
if ((core_1.types.isIdentifier(p.key) && p.key.name === key) ||
(core_1.types.isStringLiteral(p.key) && p.key.value === key)) {
if (core_1.types.isObjectProperty(p)) {
value = p.value;
break;
}
else if (core_1.types.isObjectMethod(p)) {
value = core_1.types.toExpression(p);
break;
}
}
}
return value ?? fallback();
}
function hasStaticProperties(objectExpression) {
return objectExpression.properties.every((p) => {
if (('computed' in p && p.computed) || core_1.types.isSpreadElement(p)) {
return false;
}
if (core_1.types.isObjectMethod(p) && p.kind !== 'method') {
return false;
}
return core_1.types.isIdentifier(p.key) || core_1.types.isStringLiteral(p.key);
});
}