Question

localStorage.getItem will retrive value.

and setItem will set value.

But If I want to know which key was associated with this particular value? Then how to get Key of that.?

so question I have reffered

Answer 1

visit Html5 Storage Doc to get more details. Use the following syntax to set and get the values in localstorage/sessionstorage
for storing values for a session

sessionStorage.getItem('key')
sessionStorage.setItem('key','value')

or store values permanently using

localStorage.getItem('key')
localStorage.setItem('key','value')

and u said u want to know the value but you want key then you can use the function

  localStorage.key(i);

or also you can loop through the available keys and get the desired key by cross checking the value

for(var i=0, len=localStorage.length; i<len; i++) {
    var key = localStorage.key(i);
    var value = localStorage[key];
    if(value.equals(desired_value))
    console.log(key + " => " + value);
}