document.body
document.body
document.body is a direct reference to the page's body element. Use it when a state belongs to the whole page rather than one small component.
Custom data attributes are available through dataset. Setting document.body.dataset.mode writes a data-mode attribute on the body, which CSS or other scripts can read.
Your task: Mark the page as being in review mode by setting the body's data-mode value to review. Also add the is-reviewing class to the body.
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document.body
document.body is a direct reference to the page's body element. Use it when a state belongs to the whole page rather than one small component.
Custom data attributes are available through dataset. Setting document.body.dataset.mode writes a data-mode attribute on the body, which CSS or other scripts can read.
Your task: Mark the page as being in review mode by setting the body's data-mode value to review. Also add the is-reviewing class to the body.