Charlotte, with all her life's energy to fulfill a promise for her friend, finally, it succeeded.
Charlotte made a web for the life of her friend. The web was not only woven with silk, but also with love and heart. It condensed charlotte and Wilbur's friendship, Wilbur's happiness, and trust.
It could be said that Wilbur's final happiness was tied to his trust in Charlotte, his trust in her as a true friend, his trust in her promise...
Take a look at the indispensable character in the story - Fern, she looks ordinary, pure heart, kind. She understands the language of animals because she loves them and communicates with them with her heart.
Charlotte left with a smile, but she was always Wilbur's friend.