jquery pass param to onload function

function test(params) {

        (function(params){//this is a closure which we use to ensure each iteration has the right version of the variable 'params'

            reader.onload = function(e) {
                console.log(params);//can access from outside :D
            }
        })(params);// pass in the current params to the closure so that it can be used within

    }
}

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