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"use strict";
When you insert properties into an object, and then iterate over that object (eg with a for .. in loop). In what order are the properties retrieved ? This experiment aims to find out.
Verdict:
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There is no guarantee in the ECMA spec (ecma-262) about the order of object properties.
However, in Practice:
Firefox, Node, Edge, Chrome, IE11:
Properties with non-numeric keys are iterated in the order they were inserted,
Properties with numeric keys are sorted in ascending order (this includes "stringified" numbers eg "100" or '100')
Verdict:
======
There is no guarantee in the ECMA spec (ecma-262) about the order of object properties.
However, in Practice:
Firefox, Node, Edge, Chrome, IE11:
Properties with non-numeric keys are iterated in the order they were inserted,
Properties with numeric keys are sorted in ascending order (this includes "stringified" numbers eg "100" or '100')
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