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How do I pass a variable as the HTML localStorage key value?

Posted on 2011-09-19
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Last Modified: 2012-06-27
I want to create a dynamic key name for my localStorage variable within my application based on an incremented numeric value. I want to keep track of a numeric counter and then append the numeric value to a string, and the combined concatenation becomes the localStorage key.

For example:
tctr = 1      I want localStorage.item1 = "value";
tctr = 20    I want localStorage.item20 = "value";

Here is the javascript that I am using to increment the counter variable. I need some help with the variablization (sp?) of the key:

<script type="text/javascript">
    function addCart() {
    localStorage.trxCtr=Number(localStorage.trxCtr) +1;
    var tctr = Number(localStorage.trxCtr) + 1;
    localStorage.item(tctr)="VALUE";
    $('body').append('<div id="progress">Cart Updated</div>');
    $('#rightbutton').remove();
    <!-- history.go(-1); -->
    return true;                   
    }
</script>
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Question by:kbios
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3 Comments
 
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leakim971 earned 500 total points
ID: 36562985
use : localStorage["item" + tctr ] = "VALUE";
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Author Closing Comment

by:kbios
ID: 36563010
Thanks.
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LVL 82

Expert Comment

by:leakim971
ID: 36563014
you're welcome, have a nice week!
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