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Remove check for Symbol.toStringTag field mutations in baseGetTag (#4112) (#4113)

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This commit is contained in:
Luiz Américo
2018-12-10 22:29:53 -03:00
committed by John-David Dalton
parent 6cb1f71adf
commit c77650a17b
1 changed files with 2 additions and 24 deletions
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26
.internal/baseGetTag.js
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@@ -1,7 +1,4 @@
const objectProto = Object.prototype const toString = Object.prototype.toString
const hasOwnProperty = objectProto.hasOwnProperty
const toString = objectProto.toString
const symToStringTag = Symbol.toStringTag
/** /**
* The base implementation of `getTag` without fallbacks for buggy environments. * The base implementation of `getTag` without fallbacks for buggy environments.
@@ -14,26 +11,7 @@ function baseGetTag(value) {
if (value == null) { if (value == null) {
return value === undefined ? '[object Undefined]' : '[object Null]' return value === undefined ? '[object Undefined]' : '[object Null]'
} }
if (!(symToStringTag in Object(value))) { return toString.call(value)
return toString.call(value)
}
const isOwn = hasOwnProperty.call(value, symToStringTag)
const tag = value[symToStringTag]
let unmasked = false
try {
value[symToStringTag] = undefined
unmasked = true
} catch (e) {}
const result = toString.call(value)
if (unmasked) {
if (isOwn) {
value[symToStringTag] = tag
} else {
delete value[symToStringTag]
}
}
return result
} }
export default baseGetTag export default baseGetTag