Front-end interview daily 3+1-day 857

Today's knowledge points (2021.08.20)-857th day ( I also have to )

• [html] Do you know what the Content-Security-Policy in the html tag meta does?
• [css] cite third-party css? Why?
• [js] js perform feature detection?
• [Soft Skill] What is the highest resolution of the monitor you have used?

"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 ! !

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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, 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 16126e799d5c28).
• 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 every day! ( not forget the original intention of , 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!

  I hope everyone learn and think about 16126e799d5d3d every , so as to achieve the purpose of coming here! ! ! (Don't come for anyone, come for yourself!)

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