localStorage doesn't clear it's memory mapping when clear data is used

Confirmed Issue #2894326 • Assigned to Cameron F.


May 18, 2015
This issue is public.
Found in build #
Reported by 1 person

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Steps to reproduce

load this page in Edge


or create a page with this markup:

<div style="text-align:right; width:300px;">
    Key:<input id="key" />
    <br />
    Value:<input id="value" />
    <br />
    <button id="readit">read it</button>
    <button id="writeit">write it</button>
    <button id="removeit">remove it</button>

And this JS:

var keyInput = document.getElementById(“key”);
var valueInput = document.getElementById(“value”);
var readit = document.getElementById(“readit”);
var writeit = document.getElementById(“writeit”);
var removeit = document.getElementById(“removeit”);
readit.addEventListener("click", function () {
    var theKey = keyInput.value;
    if (theKey) {
        valueInput.value = localStorage.getItem(theKey);
    } else {
writeit.addEventListener("click", function () {
    var theKey = keyInput.value;
    if (theKey) {
        localStorage.setItem(theKey, valueInput.value);
    } else {
removeit.addEventListener("click", function () {
    var theKey = keyInput.value;
    if (theKey) {
        valueInput.value = localStorage.getItem(theKey);
    } else {
function showError() {
    alert(“you must enter a key”);

try reading/writing/removing key/value pairs using the buttons displayed.

clear the cookies.
without reopening the browser or navigating the page, try any of the operations again.

Expected: Values previously set are gone, but it is possible to write and subsequently read new values, and once written removed.

Actual: cannot write new values, remove old values, and reading may return results, other than those set, or may return a value you tried to remove, or it may not do nothing.

If you have the F12 console visible, you can see errors like this printed to the screen:

SCRIPT1018: Illegal operation attempted on a registry key that has been marked for deletion.
show (40,9)

Any page that relies on local storage will probably fail without a browser restart after clearing cookies.


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Krunal S.”

      Changed Status to “Won’t fix”

      Changed Assigned To to “Krunal S.”

      Changed Status from “Won’t fix”

      Changed Assigned To from “Krunal S.” to “Shawn P.”

      Changed Status to “Confirmed”

      Changed Steps to Reproduce

      Changed Title from “localStorage for IE and spartan doesn't clear it's memory mapping when clear data is used” to “localStorage doesn't clear it's memory mapping when clear data is used”

      Changed Assigned To from “Shawn P.” to “Cameron F.”

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