next-csrf
Version:
CSRF mitigation library for Next.js
2 lines (1 loc) • 3.24 kB
JavaScript
var t,n,e=function(){return"".concat(Date.now(),"-").concat(Math.floor(8999999999999*Math.random())+1e12)},i=function(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:-1;return{name:t,value:n,delta:0,entries:[],id:e(),isFinal:!1}},a=function(t,n){try{if(PerformanceObserver.supportedEntryTypes.includes(t)){var e=new PerformanceObserver((function(t){return t.getEntries().map(n)}));return e.observe({type:t,buffered:!0}),e}}catch(t){}},r=!1,o=!1,s=function(t){r=!t.persisted},u=function(){addEventListener("pagehide",s),addEventListener("unload",(function(){}))},c=function(t){var n=arguments.length>1&&void 0!==arguments[1]&&arguments[1];o||(u(),o=!0),addEventListener("visibilitychange",(function(n){var e=n.timeStamp;"hidden"===document.visibilityState&&t({timeStamp:e,isUnloading:r})}),{capture:!0,once:n})},l=function(t,n,e,i){var a;return function(){e&&n.isFinal&&e.disconnect(),n.value>=0&&(i||n.isFinal||"hidden"===document.visibilityState)&&(n.delta=n.value-(a||0),(n.delta||n.isFinal||void 0===a)&&(t(n),a=n.value))}},p=function(t){var n=arguments.length>1&&void 0!==arguments[1]&&arguments[1],e=i("CLS",0),r=function(t){t.hadRecentInput||(e.value+=t.value,e.entries.push(t),s())},o=a("layout-shift",r),s=l(t,e,o,n);c((function(t){var n=t.isUnloading;o&&o.takeRecords().map(r),n&&(e.isFinal=!0),s()}))},d=function(){return void 0===t&&(t="hidden"===document.visibilityState?0:1/0,c((function(n){var e=n.timeStamp;return t=e}),!0)),{get timeStamp(){return t}}},m=function(t){var n=i("FCP"),e=d(),r=a("paint",(function(t){"first-contentful-paint"===t.name&&t.startTime<e.timeStamp&&(n.value=t.startTime,n.isFinal=!0,n.entries.push(t),o())})),o=l(t,n,r)},v=function(t){var n=i("FID"),e=d(),r=function(t){t.startTime<e.timeStamp&&(n.value=t.processingStart-t.startTime,n.entries.push(t),n.isFinal=!0,s())},o=a("first-input",r),s=l(t,n,o);c((function(){o&&(o.takeRecords().map(r),o.disconnect())}),!0),o||window.perfMetrics&&window.perfMetrics.onFirstInputDelay&&window.perfMetrics.onFirstInputDelay((function(t,i){i.timeStamp<e.timeStamp&&(n.value=t,n.isFinal=!0,n.entries=[{entryType:"first-input",name:i.type,target:i.target,cancelable:i.cancelable,startTime:i.timeStamp,processingStart:i.timeStamp+t}],s())}))},f=function(){return n||(n=new Promise((function(t){return["scroll","keydown","pointerdown"].map((function(n){addEventListener(n,t,{once:!0,passive:!0,capture:!0})}))}))),n},g=function(t){var n=arguments.length>1&&void 0!==arguments[1]&&arguments[1],e=i("LCP"),r=d(),o=function(t){var n=t.startTime;n<r.timeStamp?(e.value=n,e.entries.push(t)):e.isFinal=!0,u()},s=a("largest-contentful-paint",o),u=l(t,e,s,n),p=function(){e.isFinal||(s&&s.takeRecords().map(o),e.isFinal=!0,u())};f().then(p),c(p,!0)},h=function(t){var n,e=i("TTFB");n=function(){try{var n=performance.getEntriesByType("navigation")[0]||function(){var t=performance.timing,n={entryType:"navigation",startTime:0};for(var e in t)"navigationStart"!==e&&"toJSON"!==e&&(n[e]=Math.max(t[e]-t.navigationStart,0));return n}();e.value=e.delta=n.responseStart,e.entries=[n],e.isFinal=!0,t(e)}catch(t){}},"complete"===document.readyState?setTimeout(n,0):addEventListener("pageshow",n)};export{p as getCLS,m as getFCP,v as getFID,g as getLCP,h as getTTFB};