OpenROV / openrov-cockpit

src/lib/array-includes-pollyfill.js

exports.enable = function() {
    //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
    if (!Array.prototype.includes) {
        Object.defineProperty(Array.prototype, 'includes', {
            enumerable: false,
            value: function(searchElement /*, fromIndex*/ ) {
                'use strict';
                if (this == null) {

It is recommended to use === to compare with null.

                    throw new TypeError('Array.prototype.includes called on null or undefined');
                }

                var O = Object(this);
                var len = parseInt(O.length, 10) || 0;
                if (len === 0) {
                    return false;
                }
                var n = parseInt(arguments[1], 10) || 0;
                var k;
                if (n >= 0) {
                    k = n;
                } else {
                    k = len + n;
                    if (k < 0) {
                        k = 0;
                    }
                }
                var currentElement;
                while (k < len) {
                    currentElement = O[k];
                    if (searchElement === currentElement ||
                        (searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN
                        return true;
                    }
                    k++;
                }
                return false;
            }
        })

There should be a semicolon.

    }
}

There should be a semicolon.