Front-end interview daily 3+1-day 826

Today's knowledge points (2021.07.21)-day 827 ( I also have to )

• [html] Use HTML5 to customize a drop-down box
• [css] uses CSS3+SVG to realize the animation of ignition launch
• [js] write a method to find out the sum of any two numbers in an unsorted array is equal to the given number

• [Soft Skills] Have you ever learned about VR?
   

  "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 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 ! !
   
  Welcome to discuss and study with friends Issues
   
  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, 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 160fdecfae79b2).
• I hope that 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 160fdecfae7a3c 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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