public/index.html
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<!-- https://firebase.google.com/docs/perf-mon/get-started-web#add-first-input-delay-polyfill
https://github.com/GoogleChrome/web-vitals#load-the-library
To measure the first input delay metric, the polyfill library is needed.
The polyfill is now part of the web-vitals library,
so we inline code from `node_modules/web-vitals/dist/polyfill.js` here. -->
<script id="web-vitals">!function(){var e,t,n,i,r={passive:!0,capture:!0},a=new Date,o=function(){i=[],t=-1,e=null,f(addEventListener)},c=function(i,r){e||(e=r,t=i,n=new Date,f(removeEventListener),u())},u=function(){if(t>=0&&t<n-a){var r={entryType:"first-input",name:e.type,target:e.target,cancelable:e.cancelable,startTime:e.timeStamp,processingStart:e.timeStamp+t};i.forEach((function(e){e(r)})),i=[]}},s=function(e){if(e.cancelable){var t=(e.timeStamp>1e12?new Date:performance.now())-e.timeStamp;"pointerdown"==e.type?function(e,t){var n=function(){c(e,t),a()},i=function(){a()},a=function(){removeEventListener("pointerup",n,r),removeEventListener("pointercancel",i,r)};addEventListener("pointerup",n,r),addEventListener("pointercancel",i,r)}(t,e):c(t,e)}},f=function(e){["mousedown","keydown","touchstart","pointerdown"].forEach((function(t){return e(t,s,r)}))},p="hidden"===document.visibilityState?0:1/0;addEventListener("visibilitychange",(function e(t){"hidden"===document.visibilityState&&(p=t.timeStamp,removeEventListener("visibilitychange",e,!0))}),!0);o(),self.webVitals={firstInputPolyfill:function(e){i.push(e),u()},resetFirstInputPolyfill:o,get firstHiddenTime(){return p}}}();</script>
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<meta http-equiv="Content-Security-Policy" content="
default-src * blob: data: gap://ready https://ssl.gstatic.com 'unsafe-eval' 'unsafe-inline' file://* blob:;
connect-src * blob: 'unsafe-inline';
style-src * data: blob: 'self' 'unsafe-inline';
font-src * data: blob: 'unsafe-inline';
media-src * blob: 'unsafe-inline';
script-src * data: gap: blob: https://ssl.gstatic.com http://localhost 'self' 'unsafe-inline' 'unsafe-eval';
frame-src * blob: gap://ready;
img-src * 'self' data: content: blob: 'unsafe-inline';">
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<meta name="msapplication-tap-highlight" content="no">
<meta
name="viewport"
content="user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, width=device-width, viewport-fit=cover">
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<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="%REACT_APP_TITLE%">
<link rel="apple-touch-icon" href="%PUBLIC_URL%/custom/images/logo-152x152.png">
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<meta name="msapplication-TileColor" content="#2F3BA2">
<link rel="shortcut icon" href="%PUBLIC_URL%/custom/images/favicon.ico">
<!-- Latest compiled and minified CSS -->
<title>%REACT_APP_TITLE%</title>
</head>
<body>
<div id="root"></div>
</body>
</html>