Remove duplicate objects from JavaScript array

uniqueArrayofObjects.js

/**
 * Returns an array of objects with no duplicates
 * @param {Array} arr Array of Objects
 * @param {Array} keyProps Array of keys to determine uniqueness
 */
function uniqueArrayofObjects(arr, keyProps) {
    return Object.values(arr.reduce((uniqueMap, entry) => {
        const key = keyProps.map(k => entry[k]).join('|')
        if (!(key in uniqueMap)) uniqueMap[key] = entry
        return uniqueMap
    }, {}))
}

// Usage Example

const startingArray = [
    { property: 'name', content: 'adam' }, // duplicate
    { itemprop: 'name', content: 'adam' },
    { property: 'twitter', content: '@adamdehaven' },
    { property: 'name', content: 'adam' }, // duplicate
    { property: 'tag', content: 'person' },
    { property: 'tag', content: 'developer' },
    { property: 'name', content: 'adam' }, // duplicate
]

const newArray = uniqueArrayofObjects(startingArray, ['property', 'content', 'itemprop'])
console.log(newArray)

// Output

// (5) [{…}, {…}, {…}, {…}, {…}]
// 0: {property: "name", content: "adam"}
// 1: {itemprop: "name", content: "adam"}
// 2: {property: "twitter", content: "@adamdehaven"}
// 3: {property: "tag", content: "person"}
// 4: {property: "tag", content: "developer"}
// length: 5
// __proto__: Array(0)