How does html realize that the date minus days equals the second date

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Date minus days equals second date

Function cc (dd,dadd) {/ / can add error handling var a = new Date (dd) a = a.valueOf () a = a-dadd * 24 * 60 * 60 * 1000a = new Date (a) alert (a.getFullYear () + "year" + (a.getMonth () + 1) + "month" + a.getDate () + "day"} cc 2) the above is all the content of the article "how to make date minus days equal to the second date in html" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!