Front-end interview daily 3+1-day 889

Today's knowledge points (2021.09.21)-Day 889 ( I also have to )

• [html] How to set preview image for video?
• [css] css weight priority used for?
• [js] What is the difference between Object.defineProperty and Proxy in ES6?
• [Soft Skills] How does the code written by

"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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[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 algorithm and 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 16151ea8d8965e).
• 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. 16151ea8d896bf is encouraged to learn every day! ( not forget the original intention of , html, css, javascript are the cornerstones!)

• Welcome to Issues , 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 16151ea8d89756 every , so that you can achieve the purpose of coming here! ! ! (Don't come for anyone, come for yourself!)

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