!function(){ var C={"endpoint":"/api/site-experiments","cookiePrefix":"sexp_","previewParam":"sexp_preview","forbidden":"footer, .nv-footer, [data-legal], [data-consent], nav[aria-label='consent'], script, style, head, title, meta","stampHosts":["assessment.nervaibs.com","nerva.mindsethealth.com"],"standby":false}; // Standby: nothing is running or serving a winner, so there is no config worth fetching — // skip everything unless this is an explicit draft preview (?sexp_preview=). Nothing is // hidden in this state (the flicker guard renders nothing when no experiment is running). if(C.standby&&!/[?&]sexp_preview=/.test(window.location.search))return; var OUT="__out"; function nvC(){try{var s=null;try{s=JSON.parse(localStorage.getItem("consent.v1")||"null")}catch(e){}if(s&&s.version&&typeof s.analytics==="boolean")return s.analytics;var m=document.cookie.match(/(?:^|;\s*)consent_v1=([^;]+)/);if(!m)return null;var c=JSON.parse(decodeURIComponent(escape(atob(m[1]))));return typeof c.analytics==="boolean"?c.analytics:null}catch(e){return null}}function nvGate(run,deny){var ran=0,denied=0;var h=function(){var v=nvC();if(v===!0){if(ran)return;ran=1;window.removeEventListener("nerva:consent-changed",h);run();return}if(v===!1&&!denied){denied=1;if(deny)deny()}};h();if(!ran)window.addEventListener("nerva:consent-changed",h)} function readCookie(n){try{var m=document.cookie.match(new RegExp("(?:^|; )"+n.replace(/[.$?*|{}()\[\]\\/+^]/g,"\\$&")+"=([^;]*)"));return m?decodeURIComponent(m[1]):null}catch(e){return null}} function writeCookie(n,v){try{var d=new Date();d.setTime(d.getTime()+2592000000);document.cookie=n+"="+encodeURIComponent(v)+";expires="+d.toUTCString()+";path=/;SameSite=Lax"}catch(e){}} function pick(vars){var t=0,i;for(i=0;i0?vars[i].weight:0;if(t<=0)return vars[0];var r=Math.random()*t,a=0;for(i=0;i0?vars[i].weight:0;if(r=0;i--){var k=localStorage.key(i);if(k&&k.indexOf("sexp:assignment:")===0)localStorage.removeItem(k)}}catch(e){}} clearAssignmentBackups(); window.addEventListener("nerva:consent-changed",clearAssignmentBackups); function send(exp,variant,type,extra){try{if(navigator.webdriver)return;if(nvC()!==!0)return;var p={kind:"site-exp",experiment:exp,variant:variant,type:type};if(extra)for(var k in extra)p[k]=extra[k];var body=JSON.stringify(p);if(navigator.sendBeacon&&navigator.sendBeacon("/api/track",new Blob([body],{type:"application/json"})))return;fetch("/api/track",{method:"POST",headers:{"content-type":"application/json"},body:body,keepalive:!0})}catch(e){}} function cssEsc(s){return s.replace(/["\\]/g,"\\$&")} function inForbidden(el){try{return!!(el.closest&&el.closest(C.forbidden))}catch(e){return!0}} // Resolve a token's elements. Static tokens by annotation; dynamic (dyn.*) by stored selector, // forbidden-zone filtered, fingerprint- and match-count-verified. Returns null on drift. // One authored footer referral can be measured without making legal/footer content editable. // Keep the exception static-token, route, treatment, anchor and destination specific. function footerReferralMeasurement(exp,tok,el){ try{ if(tok!=="clinicians.referral.cta"||window.location.pathname.replace(/\/$/,"")!=="/clinicians"||!exp.tokens||exp.tokens.indexOf("clinicians.page.layout")<0)return!1; if(!document.querySelector('[data-exp-token~="clinicians.page.layout"]')||el.tagName!=="A"||!el.closest("footer, .nv-footer")||el.closest("[data-legal], [data-consent], nav[aria-label='consent']"))return!1; var url=new URL(el.getAttribute("href"),window.location.origin); return url.protocol==="https:"&&url.hostname==="nerva.mindsethealth.com"&&url.port===""&&url.pathname==="/refer-nerva"; }catch(e){return!1} } function resolveEls(exp,tok,measurement){ var els; var sel=exp.selectors&&exp.selectors[tok]; if(sel){ try{els=Array.prototype.slice.call(document.querySelectorAll(sel))}catch(e){return null} els=els.filter(function(el){return!inForbidden(el)}); var fp=exp.fingerprints&&exp.fingerprints[tok]; if(fp&&els.length){ if(fp.matches&&els.length!==fp.matches)return null; var kind=exp.tokenKinds[tok]; for(var i=0;i1&&s.charAt(s.length-1)==="/"?s.slice(0,-1):s}; for(var i=0;i=0)return!0} else{if(norm(p)===norm(r.value))return!0}} return!1; } function audiencePass(a,seen){ if(!a)return!0; try{ if(a.device){var mob=window.matchMedia&&window.matchMedia("(max-width: 767px)").matches;if(a.device==="mobile"&&!mob)return!1;if(a.device==="desktop"&&mob)return!1} if(a.visitor){if(a.visitor==="new"&&seen)return!1;if(a.visitor==="returning"&&!seen)return!1} if(a.utm){var q=new URLSearchParams(window.location.search);if(q.get(a.utm.param)!==a.utm.equals)return!1} }catch(e){return!1} return!0; } var originals=typeof WeakMap!=="undefined"?new WeakMap():null,capturing=null; function valueOf(el,k){return k==="href"?(el.getAttribute("href")||""):k==="imageSrc"?(el.getAttribute("src")||""):k==="layout"?(el.getAttribute("data-exp-layout")||"control"):(el.textContent||"")} function remember(el,k){ if(!originals)return null; var props=originals.get(el); if(!props){props={};originals.set(el,props)} var rec=props[k]; if(!rec){rec={original:valueOf(el,k),applied:null};props[k]=rec} if(capturing&&capturing.indexOf(el)<0)capturing.push(el); return rec; } function writeValue(el,k,val){ var rec=remember(el,k); if(valueOf(el,k)!==val){if(k==="href")el.setAttribute("href",val);else if(k==="imageSrc")el.setAttribute("src",val);else if(k==="layout")el.setAttribute("data-exp-layout",val);else el.textContent=val} if(rec)rec.applied=val; } function restoreApplied(changes){ if(!originals)return; for(var i=0;i- exactly like lib/schemas runNumberOf — a // first-match parse reads the run out of an experiment id that itself contains one // ("promo-r2-launch-r1-control" is run 1, not 2), so a later run reusing that number would leave // returning visitors holding a spent dedupe key. function runNumber(exp){if(typeof exp.run==="number")return exp.run;var v=exp.variants&&exp.variants[0];if(!v)return 0;var m=v.id.match(/^.*-r(\d+)-/);return m?Number(m[1]):0} // Consent splits this list in two, and the split is by BEHAVIOUR, not by experiment: // consent-neutral — winner-serve mode and forced preview. Both apply decided or previewed copy // with no cookie, no beacon and no localStorage, so there is nothing to consent to. Gating // them would have shown every opted-out visitor the stale server default in place of a // promoted winner (AR-002) and broken draft preview for an editor who hasn't accepted. // tracked — everything else: the sticky sexp_ cookie, the sexp:visited audience marker, the // run-scoped unique keys and the view/conversion beacons. Waits for analytics consent. // The sexp:visited reads and writes live entirely on the tracked side (AR-004): preview used to // write it, which both stored without consent and could make a later real visit look "returning" // to audience targeting. function run(list){ var pv=preview(),seenAtBoot=null,pending=0,looping=1,revealed=0; // One reveal, once nothing is still waiting on consent. A refusal settles the same as a grant, so // a strict-region visitor who declines is not left staring at hidden elements for the guard's full // 1.5s timeout (AR-003). function maybeReveal(){if(looping||revealed||pending>0)return;revealed=1;reveal()} // Memoized so the first tracked experiment's write can't make the second one read "returning". function markVisited(){if(seenAtBoot===null)seenAtBoot=!!lsGet("sexp:visited");lsSet("sexp:visited","1");return seenAtBoot} for(var i=0;i=pct){writeCookie(ck,OUT);retainAssignment(OUT);return!0} } // ── Sticky assignment. ── if(cur&&cur!==OUT){for(var v2=0;v2=10||engagedSeconds>=threshold&&!lsGet(runK+":engaged"))){ var reached=engagedSeconds>=threshold&&once(runK+":engaged"); send(exp.id,chosen.id,"engagement",{seconds:Math.min(15,pendingSeconds),unique:!!reached});pendingSeconds=0; } if(!eligible)pendingSeconds=0; } function nextEngagementTick(){engagementTick();setTimeout(nextEngagementTick,1000)} setTimeout(nextEngagementTick,1000); document.addEventListener("visibilitychange",function(){lastTick=Date.now();wasTimeEligible=!1}); window.addEventListener("nerva:consent-changed",function(){lastTick=Date.now();wasTimeEligible=!1;pendingSeconds=0;engagedSeconds=0}); // Conversion binding resolves the elements AT CLICK TIME (a framework re-render can replace // the nodes captured at bind time; a stale reference would silently drop conversions). The // FIRST click per browser per run is the unique conversion (matched pair with the unique view, // the primary verdict metric); repeat clicks add to the raw click total only. // Consent is re-read at click time, BEFORE once() burns the run-scoped conversion key on a send // that would be dropped (AR-001), and resolution stays drift-tracked so a goal whose element has // drifted reports itself rather than silently missing the click. if(exp.goal&&exp.goal.kind==="form-success")window.addEventListener("nerva:site-form-success",function(e){ if(!e.detail||e.detail.formId!==exp.goal.formId||!isActive()||nvC()!==!0||!lsGet(runK))return; send(exp.id,chosen.id,"conversion",{unique:once(runK+":conv")}); }); if(clickTokens.length&&(!exp.goal||exp.goal.kind!=="form-success")){document.addEventListener("click",function(e){if(!isActive())return;var tgt=e.target;if(!tgt)return;for(var ct=0;ct); it is then applied via the forced path only. function boot(){var pv=preview();var url=C.endpoint+(pv&&pv.exp?"?preview="+encodeURIComponent(pv.exp):"");fetch(url,{credentials:"omit"}).then(function(r){return r.json()}).then(function(d){if(d&&d.experiments)whenHydrated(function(){run(d.experiments)});else reveal()}).catch(function(){reveal()})} // The admin visual editor iframes the page with ?sexp_editor=1: the runtime must fully stand // down (no apply, no beacons) so the editor sees pristine server defaults and pollutes nothing. try{if(new URLSearchParams(window.location.search).get("sexp_editor")){reveal();return}}catch(e){} // Speculation Rules prerender gate: boot only once the document is user-visible, so activation // beacons and sticky assignment writes never fire for a page the visitor may never see. Cost of // deferral is bounded flicker on experiment-touched elements of a prerendered page, never a // wrong or double-counted exposure. // The consent gate lives per-experiment inside run(), not here: the delivery config is fetched // with credentials omitted and carries no identifiers, so fetching it is consent-neutral, and // gating the fetch would have taken winner-serve mode and preview down with it (AR-002). function start(){if(document.readyState==="loading")document.addEventListener("DOMContentLoaded",boot);else boot()} if(document.prerendering)document.addEventListener("prerenderingchange",start,{once:!0});else start(); }();

Dr. Kelly Wallace

Think Nerva could help your gut symptoms?