@woosh/meep-engine/src/core/model/object/objectKeyByValue.js

Pure JavaScript game engine. Fully featured and production ready.

import { assert } from "../../assert.js";

/**
 * Given an object and a value, find the first property with matching value and returns name of that property
 * Useful for working with ENUM-like objects
 * @template T
 * @param {Object<T>} object
 * @param {T} value
 * @returns {string|undefined} name of the property, or undefined if property not found
 */
export function objectKeyByValue(object, value) {
    assert.isObject(object, 'object');

    for (let i in object) {
        if (object[i] === value) {
            return i;
        }
    }

    return undefined;
}