{"id":11071,"date":"2025-09-06T06:07:45","date_gmt":"2025-09-06T06:07:45","guid":{"rendered":"https:\/\/www.kaashivinfotech.com\/blog\/?p=11071"},"modified":"2025-09-06T06:10:54","modified_gmt":"2025-09-06T06:10:54","slug":"javascript-and-react-js-7-differences","status":"publish","type":"post","link":"https:\/\/www.kaashivinfotech.com\/blog\/javascript-and-react-js-7-differences\/","title":{"rendered":"JavaScript vs React JS: 7 Honest Lessons I Learned While Coding"},"content":{"rendered":"<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1k_\" data-state=\"closed\">When it comes to coding, I am sure that at some point in my career, I, similar to you, have typed into Google the query What is the difference between JavaScript and React JS? at least once.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1l_\" data-state=\"closed\">And believe me, the on-line replies always seem like machine language.<\/span><\/p>\n<p>then can I simplify it as we would do, over coffee \u2615.<\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1n_\" data-state=\"closed\">JavaScript and React JS are related, but not identical.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1o_\" data-state=\"closed\"><a href=\"https:\/\/www.kaashivinfotech.com\/front-end-developer-course\/\">JavaScript<\/a> is the raw material and React.js is a fancy recipe that takes the raw material and bakes it into a yummy dish.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1p_\" data-state=\"closed\"><a href=\"https:\/\/www.kaashivinfotech.com\/react-js-training-in-chennai\/\">React.js<\/a> cannot even exist without JavaScript.<\/span><\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1q_\" data-state=\"closed\">In this blog, I will take you through the differences, similarities and my learning experience with both.<\/span> Let\u2019s go<\/p>\n<h2>1. <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1t_\" data-state=\"closed\">JavaScript and React JS: What they are.<\/span><\/h2>\n<ul>\n<li><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1u_\" data-state=\"closed\"><a href=\"https:\/\/www.kaashivinfotech.com\/front-end-developer-course\/\"><strong>JavaScript<\/strong><\/a>: Complete programming language.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1v_\" data-state=\"closed\">It is a browser-based application that assists in making web pages interactive.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_20_\" data-state=\"closed\">Press a button and something will happen?<\/span> That\u2019s JavaScript.<\/li>\n<li><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_21_\" data-state=\"closed\"><strong><a href=\"https:\/\/www.kaashivinfotech.com\/react-js-training-in-chennai\/\">React.js<\/a>:<\/strong> A Javascript library (developed by facebook) that renders user interface (UI) extraordinarily efficient.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_22_\" data-state=\"closed\">You can use components instead of thousands of lines of code.<\/span><\/li>\n<\/ul>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_23_\" data-state=\"closed\">My error number one: I got into React.js without significant learning about JavaScript.<\/span> Big regret! <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_24_\" data-state=\"closed\">I found things such as functions, arrays and promises very difficult due to lack of understanding of the fundamentals.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_25_\" data-state=\"closed\">You should start with some basic learning, which is learning JavaScript.<\/span><\/p>\n<h2>2. Syntax and Learning Curve \ud83d\udcda<\/h2>\n<p>This is where the JavaScript and React JS story becomes interesting.<\/p>\n<ul>\n<li><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2a_\" data-state=\"closed\">JavaScript in itself is fairly simple (at least initially).<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2b_\" data-state=\"closed\">You code and the browser interprets it.<\/span> Done.<\/li>\n<li><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2c_\" data-state=\"closed\">React.js brings onboard <a href=\"https:\/\/www.wikitechy.com\/tutorials\/react\/react-jsx\" target=\"_blank\" rel=\"noopener\">React JSX<\/a> &#8211; a syntax which combines both HTML and JavaScript.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2d_\" data-state=\"closed\">Not suave on the face of it.<\/span><\/li>\n<\/ul>\n<p><strong>Example:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\">\/\/ JavaScript\r\ndocument.getElementById(\"demo\").innerHTML = \"Hello World\";\r\n\r\n\/\/ React.js\r\nfunction App() {\r\n  return &lt;h1&gt;Hello World&lt;\/h1&gt;;\r\n}\r\n<\/pre>\n<p>My question when I first looked at JSX was: What is HTML doing in JavaScript? \ud83d\ude02 But after getting used to it, you will never revert back.<\/p>\n<h2>3. <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2j_\" data-state=\"closed\">JavaScript and React JS in Practice.<\/span><\/h2>\n<p>Here\u2019s how I see it:<\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2k_\" data-state=\"closed\"><strong>JavaScript<\/strong> alone Only small projects such as calculators, form validation and simple games.<\/span><\/p>\n<p><strong>React.js<\/strong> Perfect high complexity apps such as Instagram, Netflix, or a dashboard.<\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2m_\" data-state=\"closed\">Personal example: I once created a mini to-do list application using plain JavaScript.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2n_\" data-state=\"closed\">It succeeded but the code got unruly quickly.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2o_\" data-state=\"closed\">My reconstruction on React.js was cleaner and more structured, and components have simplified my life to a whole new level.<\/span><\/p>\n<h2>4. <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1r_\" data-state=\"closed\">Performance: Who Wins The Race?\u00a0<\/span><\/h2>\n<p>JavaScript is fast in its own right &#8211; it is the heart of the web.<\/p>\n<p>React.js is also much quicker because of features such as the Virtual DOM (it only updates changes, not the entire page).<\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1u_\" data-state=\"closed\">I found that React.js apps were smoother when I compared them with one another, particularly when there is a plethora of user interaction.<\/span> JavaScript alone? <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_1v_\" data-state=\"closed\">It was successful, only there was a lag in the page.<\/span><\/p>\n<h2>5. Community and Ecosystem \ud83c\udf0d<\/h2>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_22_\" data-state=\"closed\">By 2025, you will be a lucky learner of JavaScript and React JS.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_23_\" data-state=\"closed\">The two have huge followings.<\/span><\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_24_\" data-state=\"closed\"><strong>JavaScript:<\/strong> It is everywhere, and there are dozens of libraries supporting it (Node.js, Express, etc.).<\/span><\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_25_\" data-state=\"closed\"><strong>React.js:<\/strong> Supported by Meta (Facebook) and includes an enormous ecosystem of tools such as Next.js, Redux, React Native.<\/span><\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_26_\" data-state=\"closed\">One time I had to work through a React bug and in minutes there were 10+ solutions on StackOverflow.<\/span> That\u2019s the power of community.<\/p>\n<h2>6. Job Opportunities \ud83d\udcbc<\/h2>\n<p>To be honest, the vast majority of users study JavaScript and React JS due to employment.<\/p>\n<ul>\n<li>Sole knowledge of JavaScript is enough to secure your entry-level web developer jobs.<\/li>\n<li>Knowing React.js? That\u2019s where the big money is. <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2b_\" data-state=\"closed\">React is an in-demand skill.<\/span><\/li>\n<\/ul>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2c_\" data-state=\"closed\">I recall when I was seeking my first internship.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2d_\" data-state=\"closed\">They did not even ask whether I were familiar with React, it was assumed.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2e_\" data-state=\"closed\">It has become that common.<\/span><\/p>\n<h2>7. <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2h_\" data-state=\"closed\">So Which One Should You Learn First?<\/span><\/h2>\n<p>Briefly: JavaScript followed by React.js.<\/p>\n<p>Why? <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2j_\" data-state=\"closed\">Since React is based on JavaScript.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2k_\" data-state=\"closed\">It is impossible to skip JavaScript, as it is impossible to ride a sports car without knowing how to use a bicycle \ud83d\udeb4.<\/span><\/p>\n<p><strong>Here\u2019s the path I recommend:<\/strong><\/p>\n<ol>\n<li><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_2l_\" data-state=\"closed\">Get to know HTML, CSS, and JavaScript.<\/span><\/li>\n<li>Construct some projects (calculator, weather app, quiz game).<\/li>\n<li>Migrate to React.js and rewrite those projects in a more clean and quick manner.<\/li>\n<\/ol>\n<h2 data-start=\"5630\" data-end=\"5660\">Quick Comparison Table \u2696\ufe0f<\/h2>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"_tableWrapper_1rjym_13 group flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"5662\" data-end=\"6025\">\n<thead data-start=\"5662\" data-end=\"5699\">\n<tr data-start=\"5662\" data-end=\"5699\">\n<th data-start=\"5662\" data-end=\"5672\" data-col-size=\"sm\">Feature<\/th>\n<th data-start=\"5672\" data-end=\"5685\" data-col-size=\"sm\">JavaScript<\/th>\n<th data-start=\"5685\" data-end=\"5699\" data-col-size=\"sm\">React.js<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"5738\" data-end=\"6025\">\n<tr data-start=\"5738\" data-end=\"5792\">\n<td data-start=\"5738\" data-end=\"5745\" data-col-size=\"sm\">Type<\/td>\n<td data-start=\"5745\" data-end=\"5768\" data-col-size=\"sm\">Programming Language<\/td>\n<td data-start=\"5768\" data-end=\"5792\" data-col-size=\"sm\">JavaScript Library<\/td>\n<\/tr>\n<tr data-start=\"5793\" data-end=\"5852\">\n<td data-start=\"5793\" data-end=\"5804\" data-col-size=\"sm\">Use Case<\/td>\n<td data-start=\"5804\" data-end=\"5832\" data-col-size=\"sm\">General-purpose scripting<\/td>\n<td data-start=\"5832\" data-end=\"5852\" data-col-size=\"sm\">UI development<\/td>\n<\/tr>\n<tr data-start=\"5853\" data-end=\"5914\">\n<td data-start=\"5853\" data-end=\"5870\" data-col-size=\"sm\">Learning Curve<\/td>\n<td data-start=\"5870\" data-end=\"5890\" data-col-size=\"sm\">Beginner-friendly<\/td>\n<td data-start=\"5890\" data-end=\"5914\" data-col-size=\"sm\">Needs JS knowledge<\/td>\n<\/tr>\n<tr data-start=\"5915\" data-end=\"5974\">\n<td data-start=\"5915\" data-end=\"5929\" data-col-size=\"sm\">Performance<\/td>\n<td data-start=\"5929\" data-end=\"5944\" data-col-size=\"sm\">Native speed<\/td>\n<td data-start=\"5944\" data-end=\"5974\" data-col-size=\"sm\">Virtual DOM optimization<\/td>\n<\/tr>\n<tr data-start=\"5975\" data-end=\"6025\">\n<td data-start=\"5975\" data-end=\"5987\" data-col-size=\"sm\">Community<\/td>\n<td data-start=\"5987\" data-end=\"5994\" data-col-size=\"sm\">Huge<\/td>\n<td data-start=\"5994\" data-end=\"6025\" data-col-size=\"sm\">Also huge, but UI-focused<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_31_\" data-state=\"closed\">Conclusion: My JavaScript and React JS impression.<\/span><\/h2>\n<p>If I had to sum it up in one line: <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_32_\" data-state=\"closed\">JavaScript is the basis.<\/span> React.js is the upgrade.<\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_33_\" data-state=\"closed\">There is no way one can pass over the other.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_34_\" data-state=\"closed\">JavaScript is the first language to learn, followed by becoming familiar with JavaScript, and then finally, React.js is the modern web applications language.<\/span><\/p>\n<p>Want to learn Javascript, or React Js?, Visit Our Website <a href=\"https:\/\/www.kaashivinfotech.com\/\">www.kaashivinfotech.com<\/a><\/p>\n<p><span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_35_\" data-state=\"closed\">I think that learning both of them has transformed the way I work, and frankly, I am happy that I did not want to give up at the start when React was overwhelming, as it can be.<\/span> <span aria-haspopup=\"dialog\" aria-expanded=\"false\" aria-controls=\"radix-_r_36_\" data-state=\"closed\">Assuming you are on this route I would suggest the following &#8211; be patient, practice every day, and develop mini projects.<\/span> You\u2019ll thank yourself later.<\/p>\n<h2>Related Reads:<\/h2>\n<ul>\n<li>\n<p class=\"entry-title\"><a href=\"https:\/\/www.kaashivinfotech.com\/blog\/react-js-icons-guide-and-tips\/\">React JS Icons: The Complete Guide to Using Icons in React (2025)<\/a><\/p>\n<\/li>\n<li>\n<p class=\"entry-title\"><a href=\"https:\/\/www.kaashivinfotech.com\/blog\/react-js-vs-react-native-differences\/\">React js vs React Native: Key Differences Explained (2025)<\/a><\/p>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When it comes to coding, I am sure that at some point in my career, I, similar to you, have typed into Google the query What is the difference between JavaScript and React JS? at least once. And believe me, the on-line replies always seem like machine language. then can I simplify it as we [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":11072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[221,3383,3366],"tags":[8929,8925,8926,8928,5865,5864,8927,1199],"class_list":["post-11071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-difference","category-java-script","category-react","tag-create-react-app","tag-javascript-and-react-js-difference","tag-javascript-and-react-js-w3schools","tag-javascript-vs-react-vs-angular","tag-next-js","tag-node-js","tag-react-js-documentation","tag-react-native"],"_links":{"self":[{"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/posts\/11071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/comments?post=11071"}],"version-history":[{"count":0,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/posts\/11071\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/media\/11072"}],"wp:attachment":[{"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/media?parent=11071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/categories?post=11071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kaashivinfotech.com\/blog\/wp-json\/wp\/v2\/tags?post=11071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}