Front-end interview daily 3+1-day 965

Today's knowledge points (2021.12.06)-965th day ( I also have to questions 161b6158225dc2)

• [html] Use canvas to make a tangram
• [css] directly use transform: rotate(270deg); does not work, how to solve it?
• [js] Use js to write a method to calculate how many symmetrical days there are in 5000 years, such as: 20211202, and vice versa
• [Soft Skills] Use js to write a method to calculate how many symmetry days there are in 5000 years, such as: 20211202, the reverse is also the same

"The Analects", Zeng Zi said: "My day and my body are three (I reflect on myself many times a day).
Front-end interview 3+1 questions a day, use interview questions to drive learning, and make a little progress every day!
Let hard work become a habit, let struggle become a kind of enjoyment!
Believe that insists on the power of ! !

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Project address: Front-end interview daily 3+1
[Recommendation] Welcome to toss the front-end with jsliang, organize the front-end knowledge systematically, and is currently tossing LeetCode, intending to get through the two lines of both the algorithm and the data structure. GitHub address

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• Learning does not close, charging and refueling is only for meet a better self , 365 days without holidays, every morning at 5 o'clock in the morning hand-published yourself, everyone 161b6158225fb5).
• I hope everyone in this exaggerated front-end circle, keep calm , insist on spending 20 minutes every day to learn and think.
• In this ever-changing front-end with endless class libraries, it is recommended that you don't wait until you are looking for a job and then frantically questions. It is recommended to learn daily! ( not forget the original intention , html, css, javascript are the cornerstones!)

• Welcome everyone to Issues communicate, encourage PR , thank Star , if you have any good suggestions, you can add me to WeChat to discuss together!

  I hope that everyone at learn and think every day, so as to achieve the purpose of coming here! ! ! (Don't come for anyone, come for yourself!)

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