JS: finding a value by a key in dictionary

jsFindValueByKeyInDict.js

function isThereEquivalent(equivalentsArr, value) {
    try {
        var equivalent = Object.entries(equivalentsArr).find(([key]) => key === value.toString())[1] 
        return equivalent
    }
    
    catch (e) {
        if (e instanceof TypeError) {
    		    return false 
    	}
    }  
}
    
/* 
EXAMPLE
    
var equivalents = {
    1: "I", 
    4: "IV", 
    5: "V", 
    9: "IX", 
    10: "X",
    40: "XL",
    50: "L",
    90: "XC",
    100: "C",
    400: "CD",
    500: "D",
    900: "CM",
    1000: "M"
}
    
isThereEquivalent(equivalents, 90) returns XC
*/