Good ol' var copy = {}; for (var item in obj) { obj.hasOwnProperty(item) && (copy[item] = obj[item]); } approach works most of the times.
var copy = {}; for (var item in obj) { obj.hasOwnProperty(item) && (copy[item] = obj[item]); }
About those cases when this doesn't work: maybe you're solving the wrong problem.
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Good ol'
var copy = {}; for (var item in obj) { obj.hasOwnProperty(item) && (copy[item] = obj[item]); }approach works most of the times.About those cases when this doesn't work: maybe you're solving the wrong problem.