Front-end interview daily 3+1-day 961

Today's knowledge points (2021.12.02)-Day 961 ( I also have to the question 161b15c20f398f)

• [html] Use Canvas to draw a tree
• [css] Please use css3 to realize a 180-degree semicircle, with projection, hover state slowly becomes transparent
• [js] Use js to write a method to dynamically remove the js reference
• [Soft Skills] Do you prefer to study at night or in the morning? why?

"The Analects", Zeng Zi said: "My body is three (I reflect on myself many times a day).
Front-end interview 3+1 questions every 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 channels of algorithm and 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-issued yourself, everyone 3161b15c20f).
• 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 that 161b15c20f3da7 learn every day! ( not forget the original intention , html, css, javascript are the cornerstones!)

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

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

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