Hi,
It is usually a bad practice to let a map object (an plain object used
as a key-value map) have a prototype.
Objects created by JSON.parse() have a prototype by default, and we can
get rid of them by:
JSON.parse(str, function(k, v) {
if (v && typeof v === 'object' && !Array.isArray(v)) {
v.__proto__ = null;
}
return v;
});
However, implementors warn that mutating prototype causes "performance
hazards" [1].
How about adding an option to omit prototype of objects created by
JSON.parse()?
E.g.:
JSON.parse(str, { noPrototype: true });
[1]
https://developer.mozilla.org/en-US/docs/Web/JavaScript/The_performance_hazards_of__%5B%5BPrototype%5D%5D_mutation
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