people say release the old one and new a new one. Can you post a code for me to learn
people say release the old one and new a new one. Can you post a code for me to learn
because formData has only append this method, so assign null to the old one, and then new the new one
var formData = new FormData();
formData.append('key', 'value');
for (var key of formData.keys()){
formData.delete(key);
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