{
"a" : [{"b": 1, "c": 2}, {"x": 1, "yi": 5}],
"d": [{"t": 1, "c": 42}, {"r": 1, "y": 12}],
"v": [{"s": 6, "k": 77}]
}
{"b": 1, "c": 1, "x": 1, "yi": 5, "t": 1, "c": 42, "r": 1, "y": 12, "s": 6, "k": 77}
?Object.values(data).reduce((acc, curr) => {
curr.forEach((item) => Object.entries(item).forEach(([key, value]) => acc[key] = value));
return acc;
}, {});