How to Embed EmulatorJS on your Website The System Page will have examples for all the supported systems. HTML If you have a http server then the Get Started Page has a working example for the NES. React / Single Page Apps To embed within React or a SPA, the only way is to embed an iframe into your page, and run this emulator within that iframe. You cannot run it directly on the page. This will break single page apps, and tamper with the DOM. Google Sites This method is not supported . It is here purely as a guide, and support will not be given for google sites. Here is an example made in google sites: EmulatorJS Google Sites Example It is recommended if you game file is 1 mb then to host your ROM on a server and not base64. Just add a full page embed with custom code, instrctions here You can use DriveToWeb if you want to host your files using google drive (as show in the working example below) Here is the code used in the example game: < html > < head > < style > body , html { margin : 0 ; padding : 0 ; } < body > < div style = "width:100%;height:100%;max-width:100%" > < div id = "game" > < script > EJS_player = "#game" ; EJS_core = "CORE_NAME" ; EJS_pathtodata = "https://cdn.emulatorjs.org/stable/data/" ; EJS_gameUrl = "https://allancoding-website-files.on.drv.tw/ROM_FILE_NAME_&_PATH.zip" ; < script src = "https://cdn.emulatorjs.org/stable/data/loader.js" > html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}

Building EmulatorJS