JSFiddle - React, Tailwind, and code Playground

JavaScript

function inObject(obj, val) {
    return Object.keys(obj).filter(function(key) {
        return obj[key] === val;
    }).length > 0;
}

arr = {
"a": "b",
"c": "d",
"e": "f"
};

uri = "d";

alert(inObject(arr, uri))