Debug variables

I have this jquery extension and resharper warns me about expression is always false on _DEBUG checks
How can I tell resharper that it's just a debug switch

$.fn.search = function (query) {
    var _DEBUG = false;

    var ele = $(this);
    var returnVal;

    while ((returnVal = ele.findorself(query)).length === 0 && !ele.is("body") && ele.length > 0) {
        ele = ele.parent();
        if (_DEBUG) console.log(ele);
    }
    if (_DEBUG) console.log(returnVal);
    if (ele.is("body") && _DEBUG) console.log("Not found");
    if (ele.length === 0 && _DEBUG) console.log("Attempted to exceed the root element without adding it to page first");
    return returnVal;
};


$.fn.findorself = function (query) {
    if ($(this).is(query))
        return $(this);
    return $(this).find(query);
};

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