Front-end interview daily 3+1-day 813

Today's knowledge points (2021.07.07)-day 813 ( I also have to )

• [html] Make a crystal ball layout
• [css] Use css3 to draw enterprise personnel management tree organization chart special effects
• [js] with typeof test === "object" to determine whether test is an object? How to avoid it?
• [Soft Skills] Tell me about your understanding of picture depth

In "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 currently toss LeetCode, intending to get through the two channels of both the algorithm and the data structure. GitHub address

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• Learning does not close, 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 160ed723b7d96e).
• 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 160ed723b7d9d4 learn 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, please add me to WeChat to discuss together!

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

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