// initialize jwplayer var playerInstance = jwplayer('player');// player dom elements var playerContainerEl = document.querySelector('.player-container');// returns video player position from top of document function getElementOffsetTop(el) { var boundingClientRect = el.getBoundingClientRect(); var bodyEl = document.body; var docEl = document.documentElement; var scrollTop = window.pageYOffset || docEl.scrollTop || bodyEl.scrollTop; var clientTop = docEl.clientTop || bodyEl.clientTop || 0; return Math.round(boundingClientRect.top + scrollTop - clientTop); }// returns the current y scroll position function getScrollTop() { var docEl = document.documentElement; return (window.pageYOffset || docEl.scrollTop) - (docEl.clientTop || 0); }// configure jwplayer instance playerInstance.setup({ autostart: true, playlist: 'https://cdn.jwplayer.com/v2/playlists/mYdavspX', primary: 'html5', setFullscreen: true, width: '100%' });// when jwplayer instance is ready playerInstance.on('ready', function() { var config = playerInstance.getConfig(); var utils = playerInstance.utils; // get height of player element var playerHeight = config.containerHeight; // flag determining whether close has been clicked var closed = true; // CHANGED // flag determing whether player is playing var playing = false; // ADDED // eventhandler for when close button is being pressed document.getElementsByClassName('icon-close')[0].addEventListener('click', () => { closed = true; onScrollViewHandler(); }); playerInstance.on('play', function() { closed = false; playing = true; // ADDED }).on('pause', function () { playing = false; // ADDED }).on('adPlay', function() { closed = false; // ADDED playing = true; // ADDED }).on('adPause', function() { playing = false; // ADDED });// get player element position from top of document var playerOffsetTop = getElementOffsetTop(playerContainerEl);// set player container to match height of actual video element playerContainerEl.style.height = playerHeight + 'px';// below we handle window scroll event without killing performance function onScrollViewHandler() { var minimized = getScrollTop() >= playerOffsetTop;if (closed && minimized) { minimized = false; jwplayer().pause(); playing = false; // ADDED } else if (!minimized && !playing) { closed = true; // ADDED } utils.toggleClass(playerContainerEl, 'player-minimize', minimized); // update the player's size so the controls are adjusted playerInstance.resize(); }// namespace for whether or not we are waiting for setTimeout() to finish var isScrollTimeout = false;// window onscroll event handler window.onscroll = function() { // skip if we're waiting on a scroll update timeout to finish if (isScrollTimeout) return; // flag that a new timeout will begin isScrollTimeout = true; // otherwise, call scroll event view handler onScrollViewHandler(); // set new timeout setTimeout(function() { // reset timeout flag to false (no longer waiting) isScrollTimeout = false; }, 80); };});

Killstreaks (or now scorestreaks) have been a mainstay in Call of Duty for over ten years. Modern Warfare’s legacy lives on today in Black Ops 4 and even spread to other franchises. The streak system gives players something personal to go for and get rewarded for skillful play.

So, you’ve played all of the Call of Duty games and you think you know all there is to know about killstreaks? Ok, let’s put that to the test. We’ve concocted a 15 question quiz about killstreaks from across all the Call of Duty titles.

Not every question is directly about a specific killstreak, but all questions contain some connection to killstreaks or killstreak usage. We wish you the best of luck on the quiz and remember, no cheating. We’ll publish a “final results” article with stats on how the community did as a whole next week.

Please feel free to tell us how you did in the comments or on Twitter at @CharlieIntel.

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A life-long Call of Duty player, Bachelor of Game Design, and a lover of eSports. Floodsye is my real name, Tommi is just the gamertag my parents gave me.