44 lines
1.0 KiB
JavaScript
44 lines
1.0 KiB
JavaScript
"use strict";
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module.exports = function ({
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types: t
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}) {
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const INFINITY = t.binaryExpression("/", t.numericLiteral(1), t.numericLiteral(0));
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return {
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name: "minify-infinity",
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visitor: {
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// Infinity -> 1 / 0
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Identifier(path) {
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if (path.node.name !== "Infinity") {
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return;
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} // It's a referenced identifier
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if (path.scope.getBinding("Infinity")) {
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return;
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}
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if (path.parentPath.isObjectProperty({
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key: path.node
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})) {
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return;
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}
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if (path.parentPath.isMemberExpression()) {
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return;
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}
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const bindingIds = path.parentPath.getBindingIdentifierPaths();
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if (bindingIds["Infinity"] === path && // ObjectProperty is common for ObjectExpression and ObjectPattern and only
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// one of them is a Binding, the other is simply a reference
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!path.parentPath.parentPath.isObjectExpression()) {
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return;
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}
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path.replaceWith(INFINITY);
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}
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}
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};
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}; |