With more Americans taking advantage of deals offered earlier, online spending on Black Friday declined for the first time, to $8.9 billion, according to Adobe Analytics data.

       Last year's Black Friday record of $9 billion was an increase of 21.6% year over year, the company found.

       "For the first time ever, Black Friday saw a reversal of the growth trend of past years," Vivek Pandya, lead analyst for Adobe Digital Insights, said in a statement. "Shoppers are being strategic in their gift shopping, buying much earlier in the season and being flexible about when they shop to make sure they get the best deals."

       MORE: How large retailers are avoiding supply chain woes

       Online spending on Thanksgiving was $5.1 billion, the same as last year, which also marked the first time both Thanksgiving and Black Friday online spending didn't see year-over-year increases, the company found.

       That could be a further sign that "consumers started to shift their spending to earlier in the season, responding to promotions and deals from retailers that started in October," the company said.

       STOCK PHOTO/Getty Images

       Despite concerns around supply chain issues, Cyber Monday is expected to be the biggest online shopping day of the year, with $10.2 billion to $11.3 billion estimated in online spending. Last year saw a Cyber Monday record of $10.8 billion in online purchases, according to Adobe.

       MORE: US warehouses running out of room amid supply chain crisis

       So far this holiday season, consumers have spent $89.9 billion online since Nov. 1 and are on track to hit $207 billion by Dec. 26, according to Adobe.

       Adobe Analytics data covers over 1 trillion visits to U.S. retail sites and 100 million stock-keeping units, which are used to track inventory.