[Vue warn]: Error in mounted hook: "TypeError: Cannot read property 'getAttribute' of null"

参考-https://blog.csdn.net/qq_35366269/article/details/82112595?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-5.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-5.channel_param