JSFiddle - React, Tailwind, and code Playground

JavaScript

var purposeObjects = [
    {purpose: "daily"},
    {purpose: "weekly"},
    {purpose: "monthly"}
];

function findPurpose(purposeName){
    return $.grep(purposeObjects, function(item){
      return item.purpose == purposeName;
    });
};

alert(findPurpose('daily')[0].purpose);