  We apply the basis light front quantization (BLFQ) approach to describe the
valence structures of the charged light meson ground states. Specifically, the
light front wavefunctions of $\pi^\pm$, $\rho^\pm$, $K^\pm$, and $K^{*\pm}$ are
obtained as the eigenvectors of the light front effective Hamiltonians with
confinement potentials supplemented by the color singlet Nambu--Jona-Lasinio
(NJL) interactions. We adjust our model such that the spectrum of these ground
states and the charge radii of the pseudoscalar states agree with experimental
results. We present the elastic form factors and parton distribution amplitudes
(PDAs) as illustrations of the internal structures of the pseudoscalar pions
and kaons in terms of valence quarks.
