Replace == "string" with isString type-guard

Author: b-yogesh

chartlets.js/src/lib/components/Select.tsx

@@ -8,6 +8,7 @@ import {
   type SelectState,
 } from "@/lib/types/state/component";
 import { type ComponentChangeHandler } from "@/lib/types/state/event";
+import { isString } from "@/lib/utils/isString";
 
 export interface SelectProps extends Omit<SelectState, "type"> {
   onChange: ComponentChangeHandler;
@@ -64,7 +65,7 @@ export function Select({
 function normalizeSelectOption(
   option: SelectOption,
 ): [string | number, string] {
-  if (typeof option === "string") {
+  if (isString(option)) {
     return [option, option];
   } else if (typeof option === "number") {
     return [option, option.toString()];

chartlets.js/src/lib/types/state/component.ts

@@ -1,6 +1,7 @@
 import { type CSSProperties } from "react";
 import { isObject } from "@/lib/utils/isObject";
 import type { TopLevelSpec } from "vega-lite/src/spec";
+import { isString } from "@/lib/utils/isString";
 
 export type ComponentType =
   | "Box"
@@ -67,7 +68,7 @@ export interface TypographyState extends ContainerState {
 }
 
 export function isComponentState(object: unknown): object is ComponentState {
-  return isObject(object) && typeof object.type === "string";
+  return isObject(object) && isString(object.type);
 }
 
 export function isContainerState(object: unknown): object is ContainerState {

chartlets.js/src/lib/utils/objPath.ts

@@ -1,4 +1,5 @@
 import { isObject } from "@/lib/utils/isObject";
+import { isString } from "@/lib/utils/isString";
 
 export type ObjPath = (string | number)[];
 export type ObjPathLike = ObjPath | string | number | undefined | null;
@@ -83,7 +84,7 @@ export function normalizeObjPath(pathLike: ObjPathLike): ObjPath {
 }
 
 export function formatObjPath(objPath: ObjPathLike): string {
-  if (typeof objPath === "string") {
+  if (isString(objPath)) {
     return objPath;
   } else if (Array.isArray(objPath)) {
     return objPath