give her domperidone/ ondensetron syrup according to her weight.
You may feed her after half an hour of the medication.
Avoid spicy and oily food/ citrus fruits/ non-vegetarian food / soda.
You may give her milk, bread, curd, rice, biscuits, fruits like apple, papaya, banana, vegetable soups etc.
If she continues to vomit and does not tolerate any feeds you might have to visit your Pediatrician
as she might need medications like antacids if she has gastritis
Wish your daughter a speedy recovery.