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[typescript-fetch] centralise date handling, add dateLibrary (#24722)
* [typescript-fetch] centralise date handling, add dateLibrary, fix format: date Date handling was spread across four templates, each inlining its own expression. That had three consequences: 1. `format: date` was not handled at all for form parameters, so a Date was appended raw and stringified by the browser ("Wed Aug 05 2026 00:00:00 GMT+0200 (…)") instead of "2026-08-05". 2. `format: date` shifted by a day everywhere except UTC, in one direction or the other. Parsing (`new Date('2026-08-05')`) and serialising (`.toISOString().substring(0, 10)`) both work in UTC, but consumers do not: a date picker builds local midnight and display reads local getters. West of UTC a date from the API displays as the previous day; east of UTC a locally built date is sent as the previous day. An RFC 3339 full-date has no offset, so both ends have to use the same wall clock — they now both use the local calendar. `format: date-time` is a genuine instant and stays UTC. 3. Whether dates were represented as Date or string was decided by `withoutRuntimeChecks`, an unrelated flag about payload validation. All call sites (models, oneOf models, path/query/form parameters and the querystring helper) now route through serializeDate/serializeDateTime and parseDate/parseDateTime in runtime.ts, so the representation is defined in one place. The new `dateLibrary` option (`date`, the default and previous behaviour, or `string`) makes the choice explicit; `withoutRuntimeChecks` implies `string`, as before, since there is no model code left to convert with. Adds a spec fixture covering every location a date can appear in, two sample builds (one per option value), and tests for the option, the fallback and the serialisation semantics. * [typescript-fetch] address review: ES6 target, year 0-99, invalid dates, unused imports - serializeDate no longer uses padStart, which is ES2017: the es6-target sample did not compile against its own tsconfig. - parseDate builds the local date with setFullYear, so years 0000-0099 keep their century instead of picking up the multi-argument Date constructor's 1900 offset ("0045-08-05" was parsed as 1945). - parseDate rejects components that roll over, so an out-of-range date or a day the local zone skipped returns Invalid Date rather than a plausible wrong one. Previously "2026-13-45" became 2027-02-14. - serializeDate throws RangeError on an invalid Date instead of emitting "0NaN-NaN-NaN", matching serializeDateTime. - Models without a date property no longer import the date helpers, via a new x-hasDateVars extension mirroring the template's own branches. This reverts most of the sample churn from the previous commit. Drops testDateFormatUsesTheLocalCalendar: runtime.ts is identical for every spec, so asserting its body only restated the template. The per-build tsconfig typecheck covers the ES6 regression properly. * [typescript-fetch] align the oneOf date guards with the date helpers The oneOf branches tested a value with `new Date(json)` but converted it with parseDate, so the two could disagree: "2026-02-30" passes the lenient test (V8 rolls it to March 2) and then parseDate rejects it, leaving the branch selected and returning Invalid Date. Testing with the same helper that does the conversion lets the oneOf fall through to another branch instead. Adds a oneOf date member to the date-handling fixture. No sample in the repo exercised these branches, so the generated form of the guard was invisible in the samples; only the scalar variant is left out, because a scalar oneOf primitive already fails `tsc --strict` on master (it can return undefined, which is not in the union). Drops the comment justifying the ES6-safe padding: the per-build tsconfig typecheck already fails if someone reaches for padStart again. * [typescript-fetch] rebase on master: fold the #24509 null guards into the date helpers Upstream #24509 null-guarded required date properties; keep that guard but route the conversion through parseDate/serializeDate. Port the form param date handling into the apisFormParams partial extracted by #23935, and regenerate the affected samples. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * Update modules/openapi-generator/src/main/resources/typescript-fetch/runtime.mustache Co-authored-by: Esteban Gehring <esteban.gehring@gmail.com> * update TS samples --------- Co-authored-by: Nicolas Medda <nicolas@lecomptoirdespharmacies.fr> Co-authored-by: Claude Fable 5 <noreply@anthropic.com> Co-authored-by: Nicolas Medda <b2l.powa@gmail.com> Co-authored-by: Esteban Gehring <esteban.gehring@gmail.com>
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‎bin/configs/typescript-fetch-date-library-date.yaml‎

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@@ -0,0 +1,6 @@
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generatorName: typescript-fetch
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outputDir: samples/client/petstore/typescript-fetch/builds/date-library-date
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inputSpec: modules/openapi-generator/src/test/resources/3_0/typescript-fetch/date-handling.yaml
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templateDir: modules/openapi-generator/src/main/resources/typescript-fetch
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additionalProperties:
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dateLibrary: date

‎bin/configs/typescript-fetch-date-library-string.yaml‎

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generatorName: typescript-fetch
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outputDir: samples/client/petstore/typescript-fetch/builds/date-library-string
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inputSpec: modules/openapi-generator/src/test/resources/3_0/typescript-fetch/date-handling.yaml
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templateDir: modules/openapi-generator/src/main/resources/typescript-fetch
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additionalProperties:
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dateLibrary: string

‎docs/generators/typescript-fetch.md‎

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@@ -19,6 +19,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
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| Option | Description | Values | Default |
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| ------ | ----------- | ------ | ------- |
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|allowUnicodeIdentifiers|boolean, toggles whether unicode identifiers are allowed in names or not, default is false| |false|
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|dateLibrary|Option. Date library to use.|<dl><dt>**date**</dt><dd>Native Date. `format: date` and `format: date-time` are both mapped to Date and (de)serialized by the runtime.</dd><dt>**string**</dt><dd>Plain string. Values are passed through untouched, leaving date handling to the consumer.</dd></dl>|date|
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|disallowAdditionalPropertiesIfNotPresent|If false, the 'additionalProperties' implementation (set to true by default) is compliant with the OAS and JSON schema specifications. If true (default), keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.|<dl><dt>**false**</dt><dd>The 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications.</dd><dt>**true**</dt><dd>Keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.</dd></dl>|true|
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|ensureUniqueParams|Whether to ensure parameter names are unique in an operation (rename parameters that are not).| |true|
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|enumNameSuffix|Suffix that will be appended to all enum names.| |Enum|

‎modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptFetchClientCodegen.java‎

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@@ -63,6 +63,10 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
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public static final String USE_SINGLE_REQUEST_PARAMETER = "useSingleRequestParameter";
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public static final String PREFIX_PARAMETER_INTERFACES = "prefixParameterInterfaces";
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public static final String WITHOUT_RUNTIME_CHECKS = "withoutRuntimeChecks";
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public static final String DATE_LIBRARY = "dateLibrary";
67+
public static final String DATE_LIBRARY_DESC = "Option. Date library to use.";
68+
public static final String DATE_LIBRARY_DATE = "date";
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public static final String DATE_LIBRARY_STRING = "string";
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public static final String STRING_ENUMS = "stringEnums";
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public static final String STRING_ENUMS_DESC = "Generate string enums instead of objects for enum values.";
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public static final String IMPORT_FILE_EXTENSION_SWITCH = "importFileExtension";
@@ -85,6 +89,7 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
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protected boolean addedApiIndex = false;
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protected boolean addedModelIndex = false;
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protected boolean withoutRuntimeChecks = false;
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protected String dateLibrary = DATE_LIBRARY_DATE;
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protected boolean stringEnums = false;
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protected String fileNaming = PASCAL_CASE;
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protected String apiDocPath = "docs";
@@ -102,6 +107,7 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
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private static final String X_OPERATION_RETURN_PASSTHROUGH = "x-operationReturnPassthrough";
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private static final String X_KEEP_AS_JS_OBJECT = "x-keepAsJSObject";
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private static final String X_TYPESCRIPT_FETCH_API_EXAMPLE = "x-typescriptFetchApiExample";
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private static final String X_HAS_DATE_VARS = "x-hasDateVars";
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private static final String BLOB_API_EXAMPLE = "new Blob(['example file content'], { type: 'application/octet-stream' })";
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protected boolean sagasAndRecords = false;
@@ -140,6 +146,13 @@ public TypeScriptFetchClientCodegen() {
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this.cliOptions.add(new CliOption(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER, CodegenConstants.USE_SINGLE_REQUEST_PARAMETER_DESC, SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.TRUE.toString()));
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this.cliOptions.add(new CliOption(PREFIX_PARAMETER_INTERFACES, "Setting this property to true will generate parameter interface declarations prefixed with API class name to avoid name conflicts.", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
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this.cliOptions.add(new CliOption(WITHOUT_RUNTIME_CHECKS, "Setting this property to true will remove any runtime checks on the request and response payloads. Payloads will be casted to their expected types.", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
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CliOption dateLibraryOption = new CliOption(DATE_LIBRARY, DATE_LIBRARY_DESC).defaultValue(this.getDateLibrary());
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Map<String, String> dateOptions = new HashMap<>();
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dateOptions.put(DATE_LIBRARY_DATE, "Native Date. `format: date` and `format: date-time` are both mapped to Date and (de)serialized by the runtime.");
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dateOptions.put(DATE_LIBRARY_STRING, "Plain string. Values are passed through untouched, leaving date handling to the consumer.");
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dateLibraryOption.setEnum(dateOptions);
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this.cliOptions.add(dateLibraryOption);
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this.cliOptions.add(new CliOption(SAGAS_AND_RECORDS, "Setting this property to true will generate additional files for use with redux-saga and immutablejs.", SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
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this.cliOptions.add(new CliOption(STRING_ENUMS, STRING_ENUMS_DESC, SchemaTypeUtil.BOOLEAN_TYPE).defaultValue(Boolean.FALSE.toString()));
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this.cliOptions.add(new CliOption(IMPORT_FILE_EXTENSION_SWITCH, IMPORT_FILE_EXTENSION_SWITCH_DESC).defaultValue(""));
@@ -198,6 +211,14 @@ public void setWithoutRuntimeChecks(Boolean withoutRuntimeChecks) {
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this.withoutRuntimeChecks = withoutRuntimeChecks;
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}
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public String getDateLibrary() {
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return this.dateLibrary;
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}
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public void setDateLibrary(String dateLibrary) {
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this.dateLibrary = dateLibrary;
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}
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public Boolean getStringEnums() {
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return this.stringEnums;
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}
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this.setFileNaming(additionalProperties.get(FILE_NAMING).toString());
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}
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if (additionalProperties.containsKey(DATE_LIBRARY)) {
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this.setDateLibrary(additionalProperties.get(DATE_LIBRARY).toString());
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}
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if (!withoutRuntimeChecks) {
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this.modelTemplateFiles.put("models.mustache", ".ts");
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}
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// `date` needs the model (de)serialization to convert with, which
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// withoutRuntimeChecks removes: the raw string would just be cast to Date.
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if (withoutRuntimeChecks && DATE_LIBRARY_DATE.equals(this.dateLibrary)) {
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if (additionalProperties.containsKey(DATE_LIBRARY)) {
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LOGGER.warn("{}={} is not compatible with {}=true; falling back to {}={}.",
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DATE_LIBRARY, DATE_LIBRARY_DATE, WITHOUT_RUNTIME_CHECKS, DATE_LIBRARY, DATE_LIBRARY_STRING);
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}
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this.dateLibrary = DATE_LIBRARY_STRING;
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}
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if (DATE_LIBRARY_DATE.equals(this.dateLibrary)) {
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typeMapping.put("date", "Date");
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typeMapping.put("DateTime", "Date");
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} else {
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typeMapping.put("date", "string");
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typeMapping.put("DateTime", "string");
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}
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additionalProperties.put(DATE_LIBRARY, this.dateLibrary);
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// Mustache cannot compare strings, so expose the selected library as a flag.
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additionalProperties.put("isDateLibraryDate", DATE_LIBRARY_DATE.equals(this.dateLibrary));
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if (additionalProperties.containsKey(SAGAS_AND_RECORDS)) {
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this.setSagasAndRecords(convertPropertyToBoolean(SAGAS_AND_RECORDS));
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ExtendedCodegenModel cm = (ExtendedCodegenModel) mo.getModel();
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cm.imports = new TreeSet<>(cm.imports);
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this.processCodeGenModel(cm);
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// Mirrors the branches in modelGeneric.mustache that call the date helpers, so a
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// model without dates does not import them.
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cm.vendorExtensions.put(X_HAS_DATE_VARS, cm.vars.stream()
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.filter(ExtendedCodegenProperty.class::isInstance)
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.map(ExtendedCodegenProperty.class::cast)
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.anyMatch(v -> v.isPrimitiveType && !v.isArray && (v.isDateType() || v.isDateTimeType())));
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}
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// Add supporting file only if we plan to generate files in /models

‎modules/openapi-generator/src/main/resources/typescript-fetch/apis.mustache‎

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@@ -308,15 +308,15 @@ export class {{classname}} extends runtime.BaseAPI {
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{{#pathParams}}
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{{#isDateTimeType}}
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if (requestParameters['{{paramName}}'] instanceof Date) {
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(requestParameters['{{paramName}}'].toISOString()));
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(runtime.serializeDateTime(requestParameters['{{paramName}}'])));
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} else {
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(String(requestParameters['{{paramName}}'])));
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}
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{{/isDateTimeType}}
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{{^isDateTimeType}}
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{{#isDateType}}
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if (requestParameters['{{paramName}}'] instanceof Date) {
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(requestParameters['{{paramName}}'].toISOString().substring(0,10)));
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(runtime.serializeDate(requestParameters['{{paramName}}'])));
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} else {
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urlPath = urlPath.replace({{=<< >>=}}'{<<baseName>>}'<<={{ }}=>>, encodeURIComponent(String(requestParameters['{{paramName}}'])));
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}

‎modules/openapi-generator/src/main/resources/typescript-fetch/apisAssignQueryParam.mustache‎

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{{! Assign query parameters based on their type }}
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{{#isDateTimeType}}
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queryParameters['{{baseName}}'] = (requestParameters['{{paramName}}'] as any).toISOString();
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queryParameters['{{baseName}}'] = runtime.serializeDateTime(requestParameters['{{paramName}}'] as any);
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{{/isDateTimeType}}
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{{^isDateTimeType}}
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{{#isDateType}}
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queryParameters['{{baseName}}'] = (requestParameters['{{paramName}}'] as any).toISOString().substring(0,10);
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queryParameters['{{baseName}}'] = runtime.serializeDate(requestParameters['{{paramName}}'] as any);
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{{/isDateType}}
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{{^isDateType}}
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queryParameters['{{baseName}}'] = requestParameters['{{paramName}}'];

‎modules/openapi-generator/src/main/resources/typescript-fetch/apisFormParams.mustache‎

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{{^isArray}}
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if (requestParameters['{{paramName}}'] != null) {
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{{#isDateTimeType}}
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formParams.append('{{baseName}}', (requestParameters['{{paramName}}'] as any).toISOString());
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formParams.append('{{baseName}}', runtime.serializeDateTime(requestParameters['{{paramName}}'] as any));
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{{/isDateTimeType}}
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{{^isDateTimeType}}
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{{#isDateType}}
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formParams.append('{{baseName}}', runtime.serializeDate(requestParameters['{{paramName}}'] as any));
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{{/isDateType}}
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{{^isDateType}}
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{{#isPrimitiveType}}
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formParams.append('{{baseName}}', requestParameters['{{paramName}}'] as any);
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{{/isPrimitiveType}}
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{{/withoutRuntimeChecks}}
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{{/isEnumRef}}
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{{/isPrimitiveType}}
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{{/isDateType}}
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{{/isDateTimeType}}
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}
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‎modules/openapi-generator/src/main/resources/typescript-fetch/modelGeneric.mustache‎

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import { mapValues } from '../runtime{{importFileExtension}}';
1+
import { mapValues{{#isDateLibraryDate}}{{#vendorExtensions.x-hasDateVars}}, parseDate, parseDateTime, serializeDate, serializeDateTime{{/vendorExtensions.x-hasDateVars}}{{/isDateLibraryDate}} } from '../runtime{{importFileExtension}}';
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{{#hasImports}}
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{{#tsImports}}
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import type { {{{classname}}} } from './{{filename}}{{importFileExtension}}';
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{{/isArray}}
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{{^isArray}}
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{{#isDateType}}
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'{{name}}': {{^required}}{{#isNullable}}json['{{baseName}}'] === undefined ? undefined : json['{{baseName}}'] === null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? undefined : {{/isNullable}}{{/required}}({{#required}}{{#isNullable}}json['{{baseName}}'] == null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? json['{{baseName}}'] : {{/isNullable}}{{/required}}new Date(json['{{baseName}}'])),
101+
'{{name}}': {{^required}}{{#isNullable}}json['{{baseName}}'] === undefined ? undefined : json['{{baseName}}'] === null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? undefined : {{/isNullable}}{{/required}}({{#required}}{{#isNullable}}json['{{baseName}}'] == null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? json['{{baseName}}'] : {{/isNullable}}{{/required}}parseDate(json['{{baseName}}'])),
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{{/isDateType}}
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{{#isDateTimeType}}
104-
'{{name}}': {{^required}}{{#isNullable}}json['{{baseName}}'] === undefined ? undefined : json['{{baseName}}'] === null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? undefined : {{/isNullable}}{{/required}}({{#required}}{{#isNullable}}json['{{baseName}}'] == null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? json['{{baseName}}'] : {{/isNullable}}{{/required}}new Date(json['{{baseName}}'])),
104+
'{{name}}': {{^required}}{{#isNullable}}json['{{baseName}}'] === undefined ? undefined : json['{{baseName}}'] === null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? undefined : {{/isNullable}}{{/required}}({{#required}}{{#isNullable}}json['{{baseName}}'] == null ? null : {{/isNullable}}{{^isNullable}}json['{{baseName}}'] == null ? json['{{baseName}}'] : {{/isNullable}}{{/required}}parseDateTime(json['{{baseName}}'])),
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{{/isDateTimeType}}
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{{^isDateType}}
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{{^isDateTimeType}}
@@ -173,10 +173,10 @@ export function {{classname}}ToJSONTyped(value?: {{#hasReadOnly}}Omit<{{classnam
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{{^isReadOnly}}
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{{#isPrimitiveType}}
175175
{{#isDateType}}
176-
'{{baseName}}': value['{{name}}'] == null ? value['{{name}}'] : value['{{name}}'].toISOString().substring(0,10),
176+
'{{baseName}}': value['{{name}}'] == null ? value['{{name}}'] : serializeDate(value['{{name}}']),
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{{/isDateType}}
178178
{{#isDateTimeType}}
179-
'{{baseName}}': value['{{name}}'] == null ? value['{{name}}'] : value['{{name}}'].toISOString(),
179+
'{{baseName}}': value['{{name}}'] == null ? value['{{name}}'] : serializeDateTime(value['{{name}}']),
180180
{{/isDateTimeType}}
181181
{{#isArray}}
182182
'{{baseName}}': {{#uniqueItems}}{{^required}}value['{{name}}'] == null ? undefined : {{/required}}{{#required}}{{#isNullable}}value['{{name}}'] == null ? null : {{/isNullable}}{{/required}}Array.from(value['{{name}}'] as Set<any>){{/uniqueItems}}{{^uniqueItems}}value['{{name}}']{{/uniqueItems}},

‎modules/openapi-generator/src/main/resources/typescript-fetch/modelOneOf.mustache‎

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{{#isDateLibraryDate}}
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import { parseDate, parseDateTime, serializeDate, serializeDateTime } from '../runtime{{importFileExtension}}';
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{{/isDateLibraryDate}}
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{{#hasImports}}
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{{#oneOfArrays}}
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import type { {{{.}}} } from './{{.}}{{importFileExtension}}';
@@ -69,15 +72,15 @@ export function {{classname}}FromJSONTyped(json: any, ignoreDiscriminator: boole
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{{#items}}
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{{#isDateType}}
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if (Array.isArray(json)) {
72-
if (json.every(item => !(isNaN(new Date(item).getTime())))) {
73-
return json.map(value => new Date(value));
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if (json.every(item => !(isNaN(parseDate(item).getTime())))) {
76+
return json.map(value => parseDate(value));
7477
}
7578
}
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{{/isDateType}}
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{{#isDateTimeType}}
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if (Array.isArray(json)) {
79-
if (json.every(item => !(isNaN(new Date(item).getTime())))) {
80-
return json.map(value => new Date(value));
82+
if (json.every(item => !(isNaN(parseDateTime(item).getTime())))) {
83+
return json.map(value => parseDateTime(value));
8184
}
8285
}
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{{/isDateTimeType}}
@@ -115,14 +118,14 @@ export function {{classname}}FromJSONTyped(json: any, ignoreDiscriminator: boole
115118
{{#oneOfPrimitives}}
116119
{{^isArray}}
117120
{{#isDateType}}
118-
if (!(isNaN(new Date(json).getTime()))) {
119-
return {{^required}}json == null ? undefined : {{/required}}({{#required}}{{#isNullable}}json == null ? null : {{/isNullable}}{{/required}}new Date(json));
121+
if (!(isNaN(parseDate(json).getTime()))) {
122+
return {{^required}}json == null ? undefined : {{/required}}({{#required}}{{#isNullable}}json == null ? null : {{/isNullable}}{{/required}}parseDate(json));
120123
}
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{{/isDateType}}
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{{^isDateType}}
123126
{{#isDateTimeType}}
124-
if (!(isNaN(new Date(json).getTime()))) {
125-
return {{^required}}json == null ? undefined : {{/required}}({{#required}}{{#isNullable}}json == null ? null : {{/isNullable}}{{/required}}new Date(json));
127+
if (!(isNaN(parseDateTime(json).getTime()))) {
128+
return {{^required}}json == null ? undefined : {{/required}}({{#required}}{{#isNullable}}json == null ? null : {{/isNullable}}{{/required}}parseDateTime(json));
126129
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{{/isDateTimeType}}
128131
{{/isDateType}}
@@ -195,14 +198,14 @@ export function {{classname}}ToJSONTyped(value?: {{classname}} | null, ignoreDis
195198
{{#isDateType}}
196199
if (Array.isArray(value)) {
197200
if (value.every(item => item instanceof Date)) {
198-
return value.map(value => value.toISOString().substring(0,10));
201+
return value.map(value => serializeDate(value));
199202
}
200203
}
201204
{{/isDateType}}
202205
{{#isDateTimeType}}
203206
if (Array.isArray(value)) {
204207
if (value.every(item => item instanceof Date)) {
205-
return value.map(item => item.toISOString());
208+
return value.map(item => serializeDateTime(item));
206209
}
207210
}
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{{/isDateTimeType}}
@@ -241,12 +244,12 @@ export function {{classname}}ToJSONTyped(value?: {{classname}} | null, ignoreDis
241244
{{^isArray}}
242245
{{#isDateType}}
243246
if (value instanceof Date) {
244-
return ((value{{#isNullable}} as any{{/isNullable}}){{^required}}{{#isNullable}}?{{/isNullable}}{{/required}}.toISOString().substring(0,10));
247+
return (serializeDate(value{{#isNullable}} as any{{/isNullable}}));
245248
}
246249
{{/isDateType}}
247250
{{#isDateTimeType}}
248251
if (value instanceof Date) {
249-
return {{^required}}{{#isNullable}}value === null ? null : {{/isNullable}}{{^isNullable}}value == null ? undefined : {{/isNullable}}{{/required}}((value{{#isNullable}} as any{{/isNullable}}){{^required}}{{#isNullable}}?{{/isNullable}}{{/required}}.toISOString());
252+
return {{^required}}{{#isNullable}}value === null ? null : {{/isNullable}}{{^isNullable}}value == null ? undefined : {{/isNullable}}{{/required}}(serializeDateTime(value{{#isNullable}} as any{{/isNullable}}));
250253
}
251254
{{/isDateTimeType}}
252255
{{#isNumeric}}

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