A spin-off question from an earlier post, can you two-weapon fight with a dart or other thrown ranged weapons?
When you take the Attack action and attack with a light melee weapon that you’re holding in one hand, you can use a bonus action to attack with a different light melee weapon that you’re holding in the other hand. You don’t add your ability modifier to the damage of the bonus attack, unless that modifier is negative.
If either weapon has the thrown property, you can throw the weapon, instead of making a melee attack with it.
–PH page 195
Assuming you have the dual wielder feat which allows you to ignore the "light weapon" clause.
I read the second paragraph to mean that if the melee weapon has the thrown property you can throw the melee weapon.
However, another RPG.SX user reads it as if the weapon has the thrown property, you can throw the weapon, melee or not.