Hello!
I am attempting to decrement the value of all in a column (“songseq”) on the database where the number is greater than the value of a local storage item (also “songseq”). The following hardcode with a fixed value (ex: 1) works:
return "{'songseq':{'$gte':1}}";
Thus far, I’ve failed to replace the fixed value with that of the local storage item. Example:
return "{'songseq':{'$gt':"' +localStorage.getItem("songseq")+ '"}}";
Thanks in advance for your help! 
How about:
return "{'songseq':{'$gt':"' +Number(localStorage.getItem("songseq")) + '"}}";
Thank you, Bruce, but no joy. The JS editor throws a couple of errors ("Missing Semicolon" and "Expected an assignment or function call and instead saw an expression."), and the testing the app results in "Uncaught SyntaxError: Unexpected string."
This seems to be the winner!
return "{'songseq':{'$gt':"+ localStorage.getItem("songseq")+ "}}";
Learning, slowly but surely...