80% of the time? No. Perhaps not even 95% of the time. However, someday, there will be a bug withing jQuery, or a misunderstanding of what it is doing interna

80% of the time? No. Perhaps not even 95% of the time. However, someday, there will be a bug withing jQuery, or a misunderstanding of what it is doing internally, and you will have to debug. You will have to have understanding of the DOM itself.