The consequence of this is that if you request a 1000ms delay,. I'm not sure where you saw the comment from Steven Parker, but that is not correct. setTimeout/setInterval time span is limited by 2^31-1 = 2147483647 i. Repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. The provider of the API (called the caller) takes the function and. window. I don't think there's anything we can do to help you here without seeing the actual code you're calling. js and browsers. setInterval () Schedules the execution of a function every X milliseconds. First we store the x and y coordinates of the mouse pointer in the variables x and y, and then set isDrawing to true. js, Apache CouchDB and Adobe Acrobat. 执行到一个由 setTimeout() 或 setInterval() 创建的 timeout 或 interval. The setInterval() method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. onto the event queue that's set to execute in the number of milliseconds specified by the second argument to SetTimeout/SetInterval. CSS. HTML provides the fundamental building blocks for structuring Web documents and apps. All browser compatibility updates at a glance. 0. This method returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval (). 0. takeRecords() Removes all pending. But you had a "stop" button so I assumed you wanted it to be able to stop. Note: This differs from the click event in that click is fired after a full click action occurs; that is, the mouse button is pressed and released while the pointer remains inside the same. Because Promise. setInterval() function takes two arguments. nextTick () fires immediately on the same phase. Start using set-interval-async in your project by running `npm i set-interval-async`. We'd like you to try. HTML comes with elements for embedding rich media in documents — <video> and <audio> — which in turn come with their own APIs for controlling playback, seeking, etc. The intrinsic width and height of the image in CSS pixels are reflected through the properties. Specifies the number of pixels along the X axis to scroll the window or element. arg1,. References. This key is an array. See the following example (which uses setTimeout() instead of setInterval(). 4 Answers Sorted by: 182 Keep it simple. timerID = setInterval ( () => this. How does setInterval() differ from setTimeout() ? Unlike setTimeout() which executes a function just once after a delay, setInterval() will repeat a function every set number of seconds. You're currently immediately executing it which makes the function run. Contribute to mdn/content development by creating an account on GitHub. From MDN setTimeout(): Code executed by setTimeout() is run in a separate execution context to the function from which it was called. every N milliseconds), consider using window. This, in essence, lets you establish an acceleration curve so that the speed of the transition can vary over its duration. If you pass a function in, this means that the variable until is available (it's "closed in"): setInterval (function. answered Jun 29, 2014 at 16:33. Syntax var. You probably wants: come(); timer = setInterval(come, 10000); docs on MDN: delay is the number of milliseconds (thousandths of a second) that the setInterval() function should wait before each call to func. js return a Timeout object, representing the ongoing timer. JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions. Note: This feature is available in Web Workers. This method returns a numeric value that represents the ID value of the timer. setTimeout () 是属于 window 的方法，该方法用于在指定的毫秒数后调用函数或计算表达式。. I have successfully managed to make a div hide on click after 400 milliseconds using a setInterval function. Each successive timer can then use a different time:The issue: in your current implementation, setInterval would be called every time the component renders (i. After enabling OMTA, try running the above test again. You also need to bind the method to the instance of your class, because when you pass a method to the setInterval it loses the this reference. Description The setInterval () method calls a function at specified intervals (in milliseconds). Remote URLs won't load immediately. Source: MDN let timerId = setInterval( func, delay,. Esta sección proporciona una pequeña referencia a todos los métodos, propiedades y eventos disponibles a través del objeto DOM window. They can also see any changes that were made to the DOM by page scripts. The W3Schools online code editor allows you to edit code and view the result in your browserCode executed by setInterval() runs in a separate execution context than the function from which it was called. Already a subscriber? Get MDN Plus; References. This object has a finished property, which is a Promise that is fulfilled when the animation has finished playing. Add a comment. SetInterval in JavaScript. There are two native functions in the JavaScript library used to accomplish these tasks: setTimeout () and setInterval (). Description. Call clearInterval (timerId) for stopping upcoming calls. availHeight properties. then (x => console. The content behind MDN Web Docs. Sub-features. The setInterval() method of the WindowOrWorkerGlobalScope mixin repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. clearWatch() to unregister the handler. You can use an async function with setInterval. js, throttles setTimeout and setInterval. Este método devuelve un ID de intervalo que lo identifica de forma única, de ese modo, el intervalo puede ser eliminado más tarde. intervalID. Use setTimeout instead, additionally this a non-blocking method for async JS: var interval = 1000; function callback () { console. js event loop will continue running as long as the timer is active. JavaScript setTimeout () & setInterval () Method. All browser compatibility updates at a glance. I write free articles about technology. - so, in other words, global has to be the top-level for setInterval. The setInterval() function is very much like setTimeout(), using the same parameters such as the callback function, delay, and any optional arguments for passing to the callback function. log(a); console. ~24 days. pathname returns the path and filename of the current page. Will the SetInterval wait for the the "await" or will it just fire every 5 seconds? I assume it will fire every 5 seconds regardless. setInterval()takes two arguments first a function to run and second the interval in milliseconds that the function should be called at (documentation is linked in the resources section at the bottom). 0; supported by the MSHTML DOM since version 5. XMLHttpRequest: timeout property. When called on the document object, the complete document is searched, including the root node. setTimeout() Executes the function specified by. You can learn more about setTimeout in the MDN documentation. For a full demo on how to stop an interval see the the JavaScript MDN docs on setInterVal, specifically Example 2 - The following example will continue to call the flashtext() function once a second, until you clear the intervalID by clicking the Stop button. length; i--;) clearInterval (timers [i]); Known limitations: You can only pass a function (not a string) to setTimeout with this monkey patch. In this function, if promise is pending, the second value, pendingState, which is a non. In google chrome and android it works great, but I can't make it work on IE, IOS and Mozilla firefox. setInterval() setTimeout() は、一定時間後に一度だけコードを実行する必要がある場合に完璧に機能します。しかし、何度も何度もコードを実行する必要がある場合、たとえばアニメーションの場合はどうなるのでしょうか。 そこで登場するのが、setInterval()です。 To have it executed only once with minor delay, use setTimeOut instead: window. SharedWorkerGlobalScope. Unless waiting() is a function which returns another function, this will fail, as you can only treat functions as functions. setInterval(func, delay[, param1, param2,. clearInterval (intervalID) intervalID es el identificador de la acción reiterativa que se desea cancelar. An arrow function expression is a compact alternative to a traditional function expression, with some semantic differences and deliberate limitations in usage: Arrow functions don't have their own bindings to this, arguments, or super, and should not be used as methods. href returns the href (URL) of the current page. Cela contraste avec DOMContentLoaded, qui est déclenché lorsque le DOM de la page est chargé sans attendre la fin du chargement des ressources. attachShadow({ mode: "closed" }); element. Programmers use timing events to delay the execution of certain code, or to repeat code at a specific interval. Solution. – MrWhite. How to use async function with set interval. now(); console. It returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval(). This allows a website or app to offer customized results based on the user's location. Here's one I used which is entirely based on elapsed time since the grading begun by storing the system time at the point that the page is loaded, and then comparing it every half second to the system time at that point:3. First there's the setInterval(), setTimeout(), and window. requestAnimationFrame () method tells the browser that you wish to perform an animation. The detection interval is specific to the extension that calls the method. left. setTimeout () 은 비동기 함수로서, 함수 스택의 다른 함수 호출을 막지 않습니다. It evaluates an expression or calls a function at given intervals. You can refer to a function's arguments inside that function by using its arguments object. componentDidMount () { this. window. If the parameter provided does not identify a previously established action, this method does nothing. The goal of every video game is to present the user (s) with a situation, accept their input, interpret those signals into actions, and calculate a new situation resulting from those acts. A collection of code snippets and CLI guides for quick and easy reference while codingThe setInterval() method, offered on the Window and WorkerGlobalScope interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. This ID was returned by the corresponding call to setTimeout () . log (that. 定义和用法. element. requestIdleCallback() method queues a function to be called during a browser's idle periods. Video and Audio APIs. The question asked for the timer to be restarted on the blur and stopped on the focus, so I moved it around a little:Here is the code that I tried: function startTimer () { clearInterval (interval); var interval = setInterval (function () { advanceSlide (); }, 5000); }; I call that at the beginning of my page to start a slideshow that changes every 5 seconds. A boolean that, when set to true, specifies behavior that mitigates custom element issues around focusability. An animation can be implemented as a sequence of frames – usually small changes to HTML/CSS properties. Content scripts can access and modify the page's DOM, just like normal page scripts can. bind (this), 1000); So,the function you set inside the setInterval is actually a callback function. 注目すべきは、 setTimeout () および setInterval () で使用される ID のプールは共有されますので、技術的には clearTimeout () および clearInterval () は互いに交換できま. If the data can't be sent (for example, because it needs to be buffered but the buffer is full), the socket is closed. It is functionally equivalent to document. In a simple setInterval. length; This is how you can remove all active timers: for (var i = timers. let arrowRight = new KeyboardEvent ('keydown'); Object. process. The setInterval () method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. Para usar uma função, você deve defini-la em algum lugar no escopo do qual você quiser chamá-la. sandboxed modals flag. 解除したいタイムアウトの識別子です。. Content available under a Creative Commons license. setInterval iterates at a given delay and is effectively asynchronous. The setInterval () method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. So you don't want to use setInterval because it will repeatedly execute your function, instead use setTimeout. ts. This method returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval (). There are 60 other projects in the npm registry using set-interval-async. 時間切れになると関数または指定されたコードの断片を実行するタイマーを設定します。. Functions are one of the fundamental building blocks in JavaScript. And I'm really stuck. process. Timeout shouldn't be used for synchronous XMLHttpRequests requests used in a. this. Change 'setInterval' to 'setTimeout'. The setInterval() method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. setInterval(onTheMinFunc, delay); As is, your code using setTimeout means that the time it takes to execute your onTheMinFunc is being added into your delay before the next one is started, so over time, this extra delay will add up. ,*/ argN) setInterval () takes the following parameters: The function to be executed or, alternatively, a code snippet. ; When foo returns, the top frame element is popped out of the stack. JavaScript, setInterval() working beyond its timer. this is fine, but you'll run into another problem if you are using setInterval() (or setTimeout()) in a situation where it's possible to run it multiple time. Your code ( intId = setInterval(waiting(argument), 10000);) calls waiting() with argument, takes the return value, tries to treat it as a function, and sets the interval for that return value. The setInterval method returns a handle that you can use to clear the interval. Algunas funciones como globales adicionales, espacios de nombres, interfaces, y constructores no típicamente. "This" usually points to window or global. Games are constantly looping through these stages, over and over, until some end condition occurs (such as. This probably is not how it's actually implemented, but I think it serves adequately as a mental model of how it could workThe setInterval() method of the WindowOrWorkerGlobalScope mixin repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. 53. window. By default, when a timer is scheduled using either setTimeout() or setInterval() , the Node. This method is defined by the WindowOrWorkerGlobalScope mixin. async-animations. WindowOrWorkerGlobalScope. SharedWorkerGlobalScope. The provider of the API (called the caller) takes the function and. log("Data loading has been. location. e. FAQ. That's partly because JS is single threaded and partly for other reasons. You have to create a new promise to post new value. After first execution they work almost same. Element: animate () method. That part of the documentation refers to “event” background pages, which chrome would like to be the default, while in Firefox background pages are by default “persistent”, so always loaded. forEach () accept an optional thisArg parameter. availWidth / 2, window. const sleep = (milliseconds) => { return new Promise (resolve => setTimeout (resolve, milliseconds)) } Now use this inside the async function: await sleep (2000) You can also use this as well. AI Help (beta) Get real-time assistance and support. js. The function requires the ID generated by the setInterval () function as a parameter. Passing a Function object reference was introduced with JavaScript 1. Pass it to the function clearInterval and you're safe:. intervalID is just a number returned by the setInterval function that identifies which interval is going on. target. addEventListener("suspend", (event) => { console. Using setInterval will be more accurate, since the delay is. When a non-focusable part of the shadow DOM is clicked, the first focusable part is given focus, and the shadow host is given any. js', 'bar. CSS 트랜지션 은 CSS 속성을 변경할 때 애니메이션 속도를 조절하는 방법을 제공합니다. All other things being equal, code optimized for some target besides user-perceived performance (hereafter UPP) loses when competing against code optimized for UPP. Second of all, if your problem is that you are not able to clear the interval, then you need to paste the code for the user object and whichever code is modifying your intervalid object. Maximum delay value. Using setTimeout() with zero delay schedules function execution as soon as possible when the current other queued tasks are finished. So we can use this promise to know when to start the next animation. (look at the bottom of the page) SetTimeout and setInterval are from. This function can be used to implement timers,progress bar etc. js"); Note: Once a shared worker is created, any script running in the same origin can obtain a reference to that worker and communicate with it. To stop the repetitive action initiated by SetInterval, JavaScript provides the clearInterval() method. On the next line, you have declared the variable myTimer to be a function which is executed with the setInterval. exports. 0. 3. 提示： 1000 毫秒= 1 秒。. This method returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval (). setTimeout(function|code, 0) setTimeout(function|code) setInterval. The magic of JS closures keeps these variables alive even after a() has completed, and each invocation of a() gets its own closure. js is an internal construct that calls a given function after a certain period of time. clearInterval () global function. As with setTimeout, there is a minimum delay enforced. Post your current code and we might be able to guide you further. The WebSocket. Dec 2, 2011 at 3:08. This method can be written with or without the window prefix. The setInterval () method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. setInterval () 方法可按照指定的周期（以毫秒计）来调用函数或计算表达式。. log (tester); } For more info, you can check the docs. You have to assign the returned value of the setInterval function to a variable var interval; $(document). The delay in milliseconds between each execution. Window : évènement load. The <canvas> element is one of the most widely used tools for rendering 2D graphics on the web. js event loop will continue running as long as the timer is active. The target parameter determines which window or tab to load the resource into, and the windowFeatures parameter can be used to control to open a new popup with minimal UI features and control its size and position. JavaScript is a prototype-based, multi-paradigm,. log (i); }, 1000); } Your attempt is incorrect in both cases, with or without index. intervalID = setInterval (function, delay, arg0, arg1, /*. shadowRoot; // Returns null. And if we increase it in setInterval, changing by 2px with a tiny delay, like 50 times per second, then it looks smooth. The getElementsByClassName method of Document interface returns an array-like object of all child elements which have all of the given class name (s). Use encodeURI (), encodeURIComponent (), decodeURI (), or decodeURIComponent () to encode and decode escape sequences for. Note To execute the function only once, use the setTimeout () method instead. Using setInterval. Under some conditions — for example, when the user switches tabs — the browser may not actually display a dialog, or may not wait for the user to confirm or cancel. FollowWhat you have works for me. Sounds like an easy case of setInterval, but I had my doubts about whether it would work with async (spoiler: it doesn't):function logThis() { "use strict"; console. Cascading Style Sheets are used to describe the appearance of Web documents and apps. delay is an optional parameter. Present, accept, interpret, calculate, repeat. setInterval in fact expects a method as the first argument, though there is an alternative syntax where the first argument can be a string of code (not recommended by most) If you're having issues with that code, it may have to do with the scope of 'this'. Luckily, creating such a function is rather trivial: The setInterval () function is used to execute a function repeatedly at a specified interval (delay). Animating DOM elements or the content of a canvas is a classical use case for setInterval. updateSeconds. This demonstrates both document. The Window interface represents a window containing a DOM document; the document property points to the DOM document loaded in that window. Les fonctions fléchées sont souvent anonymes et ne sont pas destinées à être utilisées pour déclarer des méthodes. I use setInterval to run a function (doing AJAX stuff) every few seconds. Using Promise. This method is offered on the Window and Worker interfaces. Starting with the addition of timeouts and intervals as part of the Web API ( setTimeout () and setInterval () ), the JavaScript environment provided by Web browsers has gradually advanced to include powerful features that enable scheduling of tasks, multi-threaded application development, and so forth. Web Workers are a simple means for web content to run scripts in background threads. ; You're passing the result of searchTarget to setInterval rather than passing a reference to the function searchTarget. cookie = newCookie; In the code above, newCookie is a string of form key=value, specifying the cookie to set/update. The setInterval() method, offered on the Window and Worker interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. If padString is too long to stay within the targetLength, it will be truncated from the end. 2 Answers. Non-number delay values are silently coerced into numbers If setTimeout(). setTimeout() Executes the function specified by function in delay milliseconds. MessageChannel can be used reliably inside of Web Workers whereas the. Improve this answer. intervalID = setInterval (function, delay, arg0, arg1, /*. You may also call getElementsByClassName () on any element; it will return only elements which. The clearInterval () function clears the event of calling a function periodically in a specified time by the setInterval () function. The proper solution is setInterval (function () { /* your code *) }, msecs);. It will keep firing at the interval unless you call clearInterval (). For a full demo on how to stop an interval see the the JavaScript MDN docs on setInterVal, specifically Example 2 - The following example will continue to call the flashtext() function once a second, until you clear the intervalID by clicking the Stop button. O método setInterval() oferecido das interfaces Window e Worker, repetem chamadas de funções ou executam trechos de código, com um tempo de espera fixo entre cada. Theme. setInterval() メソッドは Window および Worker メソッドで提供され、一定の遅延間隔を置いて関数やコードスニペットを繰り返し呼び出します。 このメソッド、インターバルを一意に識別するインターバル ID を返します。よって clearInterval() を呼び出して、後でインターバルを削除できます。The arguments object is a local variable available within all non- arrow functions. I need to use setInterval to make a loop for my program. First there's the setInterval(), setTimeout(), and window. The bound function will store the parameters passed — which include the value of this and the first few arguments — as its internal state. Some examples: window. confirm () instructs the browser to display a dialog with an optional message, and to wait until the user either confirms or cancels the dialog. This is bad -very bad- due to the taxing. This solution is much more "trustable" than setInterval. CSS 트랜지션 사용하기. The mousedown event is fired at an Element when a pointing device button is pressed while the pointer is inside the element. Unlike the setInterval () method, the setTimeout () method executes the function only once. active sandboxing flag set sandboxed modals flag. The shown XHR code started from the setInterval is asynchronous and will 'finish almost immediately'; thus it isn't even relevant if setInterval waits (because the. One is the function and the other is the time that specifies the interval after which the. This method returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval (). print is not a function. As a consequence, the this keyword for the called function is set to the window (or global) object, it is not the same as the this value for the function that called setTimeout. The conventional and. Returns a value which can be used to cancel the timer. L'évènement load est déclenché lorsque la page et toutes ses ressources dépendantes (telles que des feuilles de style et des images) sont complètement chargées. intervalID = setInterval (function, delay, arg0, arg1, /*. code is a required parameter; if the user does not submit the function, the user can pass a string that is an alternative to the function. I am having trouble with the setInterval method in the sense that I need to pass its first parameter (the function being set to an interval) a parameter of its own. Once created, a worker can send messages to the JavaScript code that created it. behavior. – Matt Sanchez. setInterval () global function. In the below example, basic example of the SetInterval function where an alert is set using the SetInterval function. The Trick. Follow edited May 23, 2017 at 12:28. Clicking the stop button will not longer be able to clear the previous. For instance, we need to write a service that sends a request to the server every 5 seconds. b);}, 200); } setInterval () global function. It returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval(). Syntax: setInterval(function [, delay, arg1, arg2,. If node. If the parameter provided does not identify a previously established action, this method does nothing. JavaScript API documentation with instant search, offline support, keyboard shortcuts, mobile version, and more. setInterval will schedule the recurring execution of a function expression/reference passed as its first argument and return an unique identifier for this scheduling. ; pending callbacks: executes I/O callbacks deferred to the next loop iteration. log. ]); function is a required parameter that specifies the function to be performed after the time has elapsed. Imagine it as if there was a map of numbers to a tuple of a function and an interval. When a non-focusable part of the shadow DOM is clicked, the first focusable part is given focus, and the shadow host is. To use a function, you must define it. setTimeout and setInterval will work just fine in Firefox. It does not alter this but instead returns a shallow copy that contains some of the same elements as the ones from the original array. My problem is that I don't get how. Escape sequences. Then we call clearInterval with myTimer to stop the timer. Employing setInterval for condition polling has really been useful over the years. JavaScript has a runtime model based on an event loop, which is responsible for executing the code, collecting and processing events, and executing queued sub-tasks. js return a Timeout object, representing the ongoing timer. setTimeout () 是设. So the problem is in function useIt(), cleanStorage() does not wait for foo() to be executed if I am using setInterval or setTimeOut. 2. log) some browsers may need console. So how do I need to implement the function foo()? Kindly help me. The starting time can be either a specific time determined by the script for a site or. See full list on developer. ) This is what I got:This is just what I would do, I'm not sure if you can actually pause the setInterval. A global variable, window, representing the window in which the script is running, is. The XMLHttpRequest. // const = require ("const promiseOnce = new Promise (r => { setInterval ( () => { const date = new Date (); r (date); }, 1000); }); promiseOnce. The animate() method returns an Animation object. The setInterval () method, offered on the Window and WorkerGlobalScope interfaces, repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. Browsers including Internet Explorer, Chrome, Safari, and Firefox store the delay as a 32-bit signed integer internally. In addition, they can make network requests using the fetch() or XMLHttpRequest APIs. If you'll click twice, you'll never clear the first setInterval(). Note: This function should not be confused with the CSS image () function. requestAnimationFrame() functions, which can be used to call a specific function over a set period of time. hostname returns the domain name of the web host. If the value is less than or equal to str. Toggle its value to true. See the following example (which uses setTimeout() instead of setInterval(). The primary implementation of setInterval receives as arguments a JavaScript function and a number indicating the number of milliseconds in the interval. setInterval () global function. As explained in the comments section: useEffect would be the best way to handle this. The Image () constructor creates a new HTMLImageElement instance. , any local variables of function a(). The identifier of the repeated action you want to cancel. A global variable, window, representing the window in which the script is running, is exposed to JavaScript code. defaultView property. 2. race () to detect the status of a promise. If you're ever in doubt about anything to do with JS, always refer to MDN: setInterval(), for loop –setInterval () El método setInterval () , ofrecido en las interfaces Window y Worker , llama a una función o ejecuta un fragmento de código de forma reiterada, con un retardo de tiempo fijo entre cada llamada. It's worth noting that the pool of IDs used by setInterval() and setTimeout() are shared, which means you can technically use clearInterval() and clearTimeout() interchangeably. Documentation. location. What you can do is. Like this. According to MDN, it is considered "dangerous usage" if the function could execute for longer than the interval time. Note: Elements can have multiple animations applied to them. 달리 말하자면, setTimeout () 을 사용해서 다음 함수 호출을 "일시정지" 할 수는 없습니다. Question 1. resizeTo(window. The W3Schools online code editor allows you to edit code and view the result in your browser6 Answers. thanks @JonathanLonowski, the explanation in that link makes sense out of it, too: In browsers, the top-level scope is the global scope [. Searching a bit on the Internet I found a post in StackOverflow that shows various possible options to cancel (or simulate a cancellation) of a setInterval operation, but the most correct one. To mitigate the potential impact this can have on performance, once intervals are nested beyond five levels deep, the browser will automatically enforce. To call a function repeatedly (e. g. The DOMContentLoaded event fires when the HTML document has been completely parsed, and all deferred scripts (This function resizes the window so that it takes up one quarter of the available screen. Syntax. Users prefer, say, a responsive, smooth app that only processes 1,000 database transactions. The size specified in the constructor is reflected through the properties HTMLImageElement. g. This method returns an interval ID which uniquely identifies the interval, so you can remove it later by calling clearInterval (). If you overwrite the reference of p for a setInterval it will just execute forever.