出现的原因一般时钩子函数写法有问题或者是为空，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钩子函数就正常了
