33 lines
1.2 KiB
Markdown
33 lines
1.2 KiB
Markdown
---
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title: Window setInterval Method
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---
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## Window setInterval Method
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The `setInterval()` method calls a function or evaluates an expression at specified intervals (in milliseconds).
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```js
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setInterval(function(){ alert("Hello"); }, 3000);
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```
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The `setInterval()` method will continue calling the function until `clearInterval()` is called, or the window is closed.
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The `setInterval()` method can pass additional parameters to the function, as shown in the example below.
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```js
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setInterval(function, milliseconds, parameter1, parameter2, parameter3);
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```
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The ID value returned by `setInterval()` is used as the parameter for the `clearInterval()` method.
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Tips:
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* 1000 ms = 1 second.
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* To execute a function only once, after a specified number of milliseconds, use the `setTimeout()` method.
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#### More Information:
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Documentation: <a href='https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval' target='_blank' rel='nofollow'>MDN</a>
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JavaScript setInterval() Function Examples: <a href='https://www.sitepoint.com/setinterval-example/' target='_blank' rel='nofollow'>Sitepoint</a>
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and some more examples: <a href='https://www.w3schools.com/jsref/met_win_setinterval.asp' target='_blank' rel='nofollow'>w3schools</a>
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