// Array spreadconstsquares=[1,4,9,16];constcubes=[1,8,27];constbothArray={ ...squares, ...cubes};// rule would error here, as spreading an array causes surprising resultsbothArray==={0:1,1:8,2:27,3:16}// TS: typeof bothArray === (typeof Array<number>) ❌// Iterable spreadconstmap=newMap([[1,2],[3,4]]);constset=newSet([5,6,7,8]);constbothIterable={ ...map, ...set};// rule would error here as spreading an iterable does nothingbothIterable==={}// TS: typeof allFunc === (typeof Set<number> & typeof Map<number, number>) ❌// Function spreadfunctionfuncDecl(){}constfuncExpr=function(){};constarrowFunc=()=>{};constallFunc={ ...funcDecl, ...funcExpr, ...arrowFunc};// rule would error here as spreading a function does nothingallFunc==={};// TS: typeof allFunc === ({}) ✅// Object with call-signatureinterfaceFuncWithProps{property?:string;():number;}constfuncWithProps:FuncWithProps=()=>1;funcWithProps.property='foo';constspreadFuncWithProps={...funcWithProps};// rule would NOT error here as custom function props are spread as expectedspreadFuncWithProps==={property:'foo'};// TS: typeof allFunc === (FuncWithProps) ✅