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It allows you to pass function arguments as an object. You can set default values for the arguments (see "size" argument) and it also allows for omitting arguments when calling a function rather than using null.

#javascript#object#es6
function buildElement({ color, shape, size = 20, callback }){
    // Do something...
}

var el1 = buildElement({ color, shape, size: 10, callback: function(){} });
var el2 = buildElement({ color, size });
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