由于默认情况下未启用严格模式，如何在chrome dev工具中访问'let'关键字？

Question

I have tried to declare a variable inside chrome dev tool console using let keyword and it didn't give me any error. But I heard that let keyword is only available in 'strict mode' and in dev tool strict mode is disabled.

let name = 'john';
console.log(name);

Answer 1

I think you have a misunderstand:

The purpose of "use strict" is to indicate that the code should be executed in "strict mode". With strict mode, you can not, for example, use undeclared variables.

And let is new keyword from ES2015, it can be use without strict mode.