const unordered = {
'b': 'foo',
'c': 'bar',
'a': 'baz'
};
console.log(JSON.stringify(unordered));
// → '{"b":"foo","c":"bar","a":"baz"}'
const ordered = {};
Object.keys(unordered).sort().forEach(function(key) {
ordered[key] = unordered[key];
});
console.log(JSON.stringify(ordered));
// → '{"a":"baz","b":"foo","c":"bar"}'
来源:https://stackoverflow.com/questions/5467129/sort-javascript-object-by-key