{"id":4006,"date":"2022-03-26T12:33:08","date_gmt":"2022-03-26T12:33:08","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=4006"},"modified":"2022-05-04T07:09:17","modified_gmt":"2022-05-04T07:09:17","slug":"what-is-arrow-function-in-react-how-is-it-used","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/reactjs\/what-is-arrow-function-in-react-how-is-it-used\/","title":{"rendered":"What is Arrow function in React ? How is it used ?"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-4272\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions.png\" alt=\"\" width=\"954\" height=\"635\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions.png 954w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions-300x200.png 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions-768x511.png 768w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions-390x260.png 390w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-functions-820x546.png 820w\" sizes=\"(max-width: 954px) 100vw, 954px\" \/><\/p>\n<ul>\n<li style=\"text-align: justify;\">They are more of a brief syntax for writing the function expression. It is also known as <em>\u2018fat arrow<\/em> \u2018(<strong>=><\/strong>) the functions.<\/li>\n<li style=\"text-align: justify;\">This keyword represented the object that called the function, which could be the window, the document, a button or whatever in a regular function.<\/li>\n<li style=\"text-align: justify;\">It allows to bind the context of the components properly since in ES6 auto binding is not available by default.<\/li>\n<li style=\"text-align: justify;\">While working with the higher-order functions, Arrow functions are most useful.<\/li>\n<li style=\"text-align: justify;\">This keyword <em>always<\/em>\u00a0represents the object that defined the arrow function in arrow function.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-4274\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function.jpg\" alt=\"\" width=\"1057\" height=\"728\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function.jpg 1057w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function-300x207.jpg 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function-1024x705.jpg 1024w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function-768x529.jpg 768w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function-390x269.jpg 390w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/03\/arrow-function-820x565.jpg 820w\" sizes=\"(max-width: 1057px) 100vw, 1057px\" \/><\/p>\n<p>For example, in <strong>regular<\/strong> <strong>functions:<\/strong><\/p>\n<div class=\"code-embed-wrapper\"> <div class=\"code-embed-infos\"> <\/div> <pre class=\"language-markup code-embed-pre line-numbers\"  data-start=\"1\" data-line-offset=\"0\"><code class=\"language-markup code-embed-code\">class Header {<br\/>  constructor() {<br\/>    this.color = &quot;Blue&quot;;<br\/>  }<br\/><br\/>\/\/Regular function:<br\/>  changeColor = function() {<br\/>    document.getElementById(&quot;demo&quot;).innerHTML += this;<br\/>  }<br\/>}<br\/><br\/>const myheader = new Header();<br\/><br\/>\/\/The window object calls the function:<br\/>window.addEventListener(&quot;load&quot;, myheader.changeColor);<br\/><br\/>\/\/A button object calls the function:<br\/>document.getElementById(&quot;btn&quot;).addEventListener(&quot;click&quot;, myheader.changeColor);<\/code><\/pre> <\/div>\n<p>For example, in <strong>Arrow<\/strong> <strong>functions:<\/strong><\/p>\n<div class=\"code-embed-wrapper\"> <div class=\"code-embed-infos\"> <\/div> <pre class=\"language-markup code-embed-pre line-numbers\"  data-start=\"1\" data-line-offset=\"0\"><code class=\"language-markup code-embed-code\">class Header {<br\/>  constructor() {<br\/>    this.color = &quot;Blue&quot;;<br\/>  }<br\/><br\/>\/\/Arrow function:<br\/>  changeColor = () => {<br\/>    document.getElementById(&quot;demo&quot;).innerHTML += this;<br\/>  }<br\/>}<br\/><br\/>const myheader = new Header();<br\/><br\/><br\/>\/\/The window object calls the function:<br\/>window.addEventListener(&quot;load&quot;, myheader.changeColor);<br\/><br\/>\/\/A button object calls the function:<br\/>document.getElementById(&quot;btn&quot;).addEventListener(&quot;click&quot;, myheader.changeColor);<\/code><\/pre> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>They are more of a brief syntax for writing the function expression. It is also known as \u2018fat arrow \u2018(=>) the functions. This keyword represented the object that called the function, which could be the window, the document, a button or whatever in a regular function. It allows to bind the context of the components [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16542],"tags":[16778,16788,16781,16777,16785,16782,16783,16779,16780,16776,16784,16787,16786],"class_list":["post-4006","post","type-post","status-publish","format-standard","hentry","category-reactjs","tag-arrow-function-in-react","tag-arrow-function-in-react-example","tag-arrow-function-in-react-native","tag-passing-functions-to-components","tag-react-arrow-function","tag-react-arrow-function-component","tag-react-arrow-function-props","tag-react-arrow-function-vs-function","tag-react-arrow-function-with-parameters","tag-react-es6-arrow-functions","tag-react-onclick-arrow-function","tag-what-is-arrow-function-in-react","tag-what-is-arrow-function-in-react-how-is-it-used"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Arrow function in React ? 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