check if localstorage key exists

109

check if localstorage key exists -

if (localStorage.getItem("username") === null) {
  //...
}

check if item exists in localstorage javascript -

//If the given key does not exist in the list associated with the object then this method must return null.

if (localStorage.getItem("infiniteScrollEnabled") === null) {
  //...
}

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