Front-end interview daily 3+1-day 918

Today's knowledge points (2021.10.20)-918th day ( I also have to )

• [html] Use canvas to make a circular progress bar with the number
• [css] Do you know the matrix of css3? Tell me about your knowledge
• [js] Object.assign() a shallow copy or a deep copy?
• [Soft skills] Do you know what HTTPDNS is? What is the difference between it and DNS?

"The Analects", Zeng Zi said: "My day and my body" (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 both the algorithm and the data structure. GitHub address

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• Learning is not closed, 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 1617802e4b67b4).
• 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 learn 1617802e4b67f4 every day! ( not forget the original intention , html, css, javascript are the cornerstones!)

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

  I hope you learn and think about 1617802e4b6850 every , so as to achieve the purpose of coming here! ! ! (Don't come for anyone, come for yourself!)

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