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  1. When should I use ?? (nullish coalescing) vs || (logical OR)?

    Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently. Previously most JavaScript code used ||. let userAge =

  2. When should I use arrow functions in ECMAScript 6?

    Apr 8, 2014 · 7 In addition to the great answers so far, I'd like to present a very different reason why arrow functions are in a certain sense fundamentally better than "ordinary" JavaScript functions. For …

  3. What do ">>" and "<<" mean in Javascript? - Stack Overflow

    Aug 9, 2011 · These are the shift right (with sign) and shift left operators. Essentially, these operators are used to manipulate values at BIT-level. They are typically used along with the the & (bitwise AND) …

  4. What does "javascript:void (0)" mean? - Stack Overflow

    Aug 18, 2009 · Usage of javascript:void(0) means that the author of the HTML is misusing the anchor element in place of the button element. Anchor tags are often abused with the onclick event to create …

  5. Java 和 JavaScript 是什么关系? - 知乎

    Nov 13, 2011 · javascript本来叫livescript,在Netscape Navigator 2正式发布前夕,Netscape 为了搭上媒体热炒java的顺风车,所以改名为javascript。java和javascript没什么关系

  6. Is there a "null coalescing" operator in JavaScript?

    Jan 25, 2009 · JavaScript now supports the nullish coalescing operator (??). It returns its right-hand-side operand when its left-hand-side operand is null or undefined, and otherwise returns its left-hand-side …

  7. What does this symbol mean in JavaScript? - Stack Overflow

    What is this? This is a collection of questions that come up every now and then about syntax in JavaScript. This is also a Community Wiki, so everyone is invited to participate in maintaining this ...

  8. How to remove all event listeners of a DOM object in JavaScript?

    How to remove all event listeners of a DOM object in JavaScript? Asked 15 years, 1 month ago Modified 4 months ago Viewed 241k times

  9. syntax - What's the meaning of "=>" (a fat arrow formed from ...

    Jun 20, 2017 · 1 JavaScript arrow functions are roughly the equivalent of lambda functions in python or blocks in Ruby. These are anonymous functions with their own special syntax and operate in the …

  10. サポートされているブラウザでログインする

    ステップ 2. Chrome で JavaScript を有効にする サポートされているブラウザを使用してもログインできない場合は、JavaScript の有効化が必要になることがあります。