LGTM & code review

LGTM & code review

LGTM is an acronym meaning looks good to me, frequently used when reviewing documents.

https://github.com/lodash/lodash/pull/4756

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https://github.com/learning-js-by-reading-source-codes/lodash/blob/master/.internal/getTag.js

js data types checker

Object.prototype.toString.call();


function getTag(value) {
  if (value == null) {
    return value === undefined ? '[object Undefined]' : '[object Null]'
  }
  return toString.call(value)
}

const value = 1n;
getTag(value) === '[object BigInt]'
// true


getTag(value)
// "[object BigInt]"
toString.call(value)
// "[object BigInt]"

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