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30 lines
721 B
Markdown
30 lines
721 B
Markdown
JavaScript is single-threaded but it can still take advantage of asynchronous
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programming.
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The Event Loop is a Javascript construct responsible
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for holding operations to be executed asynchronously with respect to the main
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flow of execution. Whenever we meet a portion of code that may not be
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possible to execute now, it is put in the Event Loop. Let's look at some
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examples:
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1.
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```javascript
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setTimeout(() => console.log('test'), 1000);
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```
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console.log('test') will be put in the Event Loop.
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2.
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```javascript
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const promise = new Promise(function (resolve, reject) {
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console.log('test');
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resolve();
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}).then(() => {
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console.log('test2');
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});
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```
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console.log('test2') will be put in the Event Loop. |