Variable sessionStorageConst
sessionStorage: {
clear: (() => void);
getItem: ((key: string) => null | string);
getPrefixedKeys: ((prefix: string) => string[]);
key: ((index: number) => null | string);
length: (() => number);
removeItem: ((key: string) => void);
setItem: ((key: string, val: string) => void);
keys(): string[];
} = ...