How to find object in array by property in javascript?

by

Use filter function of array

var Obj = [
  {"start": 0, "length": 3, "style": "text"},
  {"start": 4, "length": 2, "style": "operator"},
  {"start": 4, "length": 3, "style": "error"}
];

var result = Obj.filter(x => x.start === 4);
console.log(result);

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