26 lines
542 B
TypeScript
26 lines
542 B
TypeScript
import { declare } from "@babel/helper-plugin-utils";
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import { types as t } from "@babel/core";
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export default declare(api => {
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api.assertVersion(7);
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return {
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name: "transform-strict-mode",
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visitor: {
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Program(path) {
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const { node } = path;
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for (const directive of node.directives) {
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if (directive.value.value === "use strict") return;
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}
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path.unshiftContainer(
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"directives",
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t.directive(t.directiveLiteral("use strict")),
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);
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},
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},
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};
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});
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