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43 lines
1.5 KiB
TypeScript
43 lines
1.5 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/jsutils/instanceOf.js
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/**
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* A replacement for instanceof which includes an error warning when multi-realm
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* constructors are detected.
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*/
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// See: https://expressjs.com/en/advanced/best-practice-performance.html#set-node_env-to-production
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// See: https://webpack.js.org/guides/production/
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export default Deno.env.NODE_ENV === 'production' ?
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/* istanbul ignore next (See: https://github.com/graphql/graphql-js/issues/2317) */
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// eslint-disable-next-line no-shadow
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function instanceOf(value, constructor) {
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return value instanceof constructor;
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} : // eslint-disable-next-line no-shadow
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function instanceOf(value, constructor) {
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if (value instanceof constructor) {
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return true;
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}
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if (value) {
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const valueClass = value.constructor;
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const className = constructor.name;
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if (className && valueClass && valueClass.name === className) {
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throw new Error(`Cannot use ${className} "${value}" from another module or realm.
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Ensure that there is only one instance of "graphql" in the node_modules
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directory. If different versions of "graphql" are the dependencies of other
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relied on modules, use "resolutions" to ensure only one version is installed.
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https://yarnpkg.com/en/docs/selective-version-resolutions
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Duplicate "graphql" modules cannot be used at the same time since different
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versions may have different capabilities and behavior. The data from one
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version used in the function from another could produce confusing and
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spurious results.`);
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}
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}
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return false;
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};
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