Function getModeForUsageLocation

test/fixtures/snapshot/typescript.js:116232–116259

* Calculates the final resolution mode for a given module reference node. This is generally the explicitly provided resolution mode, if * one exists, or the mode of the containing source file. (Excepting import=require, which is always commonjs, and dynamic import, which is always esm). *

(file, usage)

     * @returns The final resolution mode of the import
     */
    function getModeForUsageLocation(file, usage) {
        var _a, _b;
        if (file.impliedNodeFormat === undefined)
            return undefined;
        if ((ts.isImportDeclaration(usage.parent) || ts.isExportDeclaration(usage.parent))) {
            var isTypeOnly = isExclusivelyTypeOnlyImportOrExport(usage.parent);
            if (isTypeOnly) {
                var override = getResolutionModeOverrideForClause(usage.parent.assertClause);
                if (override) {
                    return override;
                }
            }
        }
        if (usage.parent.parent && ts.isImportTypeNode(usage.parent.parent)) {
            var override = getResolutionModeOverrideForClause((_a = usage.parent.parent.assertions) === null || _a === void 0 ? void 0 : _a.assertClause);
            if (override) {
                return override;
            }
        }
        if (file.impliedNodeFormat !== ts.ModuleKind.ESNext) {
            // in cjs files, import call expressions are esm format, otherwise everything is cjs
            return ts.isImportCall(ts.walkUpParenthesizedExpressions(usage.parent)) ? ts.ModuleKind.ESNext : ts.ModuleKind.CommonJS;
        }
        // in esm files, import=require statements are cjs format, otherwise everything is esm
        // imports are only parent'd up to their containing declaration/expression, so access farther parents with care
        var exprParentParent = (_b = ts.walkUpParenthesizedExpressions(usage.parent)) === null || _b === void 0 ? void 0 : _b.parent;
        return exprParentParent && ts.isImportEqualsDeclaration(exprParentParent) ? ts.ModuleKind.CommonJS : ts.ModuleKind.ESNext;
    }
    ts.getModeForUsageLocation = getModeForUsageLocation;
    /* @internal */
    function getResolutionModeOverrideForClause(clause, grammarErrorOnNode) {