出現的原因一般時鈎子函數寫法有問題或者是為空，如 vue.esm.js?efeb:628 [Vue warn]: Error in mounted hook: "TypeError: handler.call is not a function" vue.esm.js?efeb:628 [Vue warn]: Error in mounted hook: "TypeError: handler.call is not a function" vue.esm.js?efeb:628 [Vue warn]: Error in mounted hook: "TypeError: handler.call is not a function" 修改mounted鈎子函數就正常了
