listen to localstorage changes

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showing results for - "listen to localstorage changes"
María Alejandra
03 Jun 2018
1window.addEventListener('storage', () => {
2  // When local storage changes, dump the list to
3  // the console.
4  console.log(JSON.parse(window.localStorage.getItem('sampleList')));
5});
source
Louis
18 Aug 2016
1var originalSetItem = localStorage.setItem;
2
3localStorage.setItem = function(key, value) {
4  var event = new Event('itemInserted');
5
6  event.value = value; // Optional..
7  event.key = key; // Optional..
8
9  document.dispatchEvent(event);
10
11  originalSetItem.apply(this, arguments);
12};
13
14var localStorageSetHandler = function(e) {
15  alert('localStorage.set("' + e.key + '", "' + e.value + '") was called');
16};
17
18document.addEventListener("itemInserted", localStorageSetHandler, false);
19
20localStorage.setItem('foo', 'bar'); // Pops an alert
source
Lavinia
28 May 2017
1var originalSetItem = localStorage.setItem; 
2localStorage.setItem = function(){
3    document.createEvent('Event').initEvent('itemInserted', true, true);
4    originalSetItem.apply(this, arguments);
5}
6
source
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