$\mathrm{LiCl}$ is ionic as well as covalent. $\mathrm{LiCl}$ is ionic because $\mathrm{Li}$ is metal and $\mathrm{Cl}$ is non-metal and has electrostatic force of attraction between positive $\left(\mathrm{Li}^{+}\right)$and negative $\left(\mathrm{Cl}^{-}\right)$ion.
$\mathrm{LiCl}$ is covalent because smaller size of $\mathrm{Li}^{\oplus}$ easily polarise the larger size of $\mathrm{Cl}^{-}$ion. Thus, it is covalent as well as ionic.