From 9e522d76e77ec2aa6a58c898cd1a4d51955847ec Mon Sep 17 00:00:00 2001
From: Ahmad Barclay <Ahmad.Barclay@ons.gov.uk>
Date: Fri, 15 Mar 2024 13:21:08 +0000
Subject: [PATCH] add loading=lazy attribute to iframes generated by pym.js

---
 src/main/web/js/third-party/pym.min.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/web/js/third-party/pym.min.js b/src/main/web/js/third-party/pym.min.js
index bc4fc323d6..ad58687d0d 100644
--- a/src/main/web/js/third-party/pym.min.js
+++ b/src/main/web/js/third-party/pym.min.js
@@ -1,2 +1,2 @@
-/*! pym.js - v1.3.2 - 2018-02-13 */
-!function(a){"function"==typeof define&&define.amd?define(a):"undefined"!=typeof module&&module.exports?module.exports=a():window.pym=a.call(this)}(function(){var a={},b=function(a){var b=document.createEvent("Event");b.initEvent("pym:"+a,!0,!0),document.dispatchEvent(b)},c=function(a){var b=new RegExp("[\\?&]"+a.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]")+"=([^&#]*)"),c=b.exec(location.search);return null===c?"":decodeURIComponent(c[1].replace(/\+/g," "))},d=function(a,b){if(("*"===b.xdomain||a.origin.match(new RegExp(b.xdomain+"$")))&&"string"==typeof a.data)return!0},e=function(a){var b=/^(?:(?:https?|mailto|ftp):|[^&:\/?#]*(?:[\/?#]|$))/gi;if(a.match(b))return!0},f=function(a,b,c){return["pym",a,b,c].join("xPYMx")},g=function(a){var b=["pym",a,"(\\S+)","(.*)"];return new RegExp("^"+b.join("xPYMx")+"$")},h=Date.now||function(){return(new Date).getTime()},i=function(a,b,c){var d,e,f,g=null,i=0;c||(c={});var j=function(){i=!1===c.leading?0:h(),g=null,f=a.apply(d,e),g||(d=e=null)};return function(){var k=h();i||!1!==c.leading||(i=k);var l=b-(k-i);return d=this,e=arguments,l<=0||l>b?(g&&(clearTimeout(g),g=null),i=k,f=a.apply(d,e),g||(d=e=null)):g||!1===c.trailing||(g=setTimeout(j,l)),f}},j=function(){for(var b=a.autoInitInstances.length,c=b-1;c>=0;c--){var d=a.autoInitInstances[c];d.el.getElementsByTagName("iframe").length&&d.el.getElementsByTagName("iframe")[0].contentWindow||a.autoInitInstances.splice(c,1)}};return a.autoInitInstances=[],a.autoInit=function(c){var d=document.querySelectorAll("[data-pym-src]:not([data-pym-auto-initialized])"),e=d.length;j();for(var f=0;f<e;++f){var g=d[f];g.setAttribute("data-pym-auto-initialized",""),""===g.id&&(g.id="pym-"+f+"-"+Math.random().toString(36).substr(2,5));var 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b="",c=this.url.indexOf("#");for(c>-1&&(b=this.url.substring(c,this.url.length),this.url=this.url.substring(0,c)),this.url.indexOf("?")<0?this.url+="?":this.url+="&",this.iframe.src=this.url+"initialWidth="+a+"&childId="+this.id,this.settings.optionalparams&&(this.iframe.src+="&parentTitle="+encodeURIComponent(document.title),this.iframe.src+="&"+this.settings.parenturlparam+"="+encodeURIComponent(this.settings.parenturlvalue)),this.iframe.src+=b,this.iframe.setAttribute("width","100%"),this.iframe.setAttribute("scrolling","no"),this.iframe.setAttribute("marginheight","0"),this.iframe.setAttribute("frameborder","0"),this.settings.title&&this.iframe.setAttribute("title",this.settings.title),void 0!==this.settings.allowfullscreen&&!1!==this.settings.allowfullscreen&&this.iframe.setAttribute("allowfullscreen",""),void 0!==this.settings.sandbox&&"string"==typeof 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a.data){var b=a.data.match(this.messageRegex);if(b&&3===b.length){var c=b[1],e=b[2];this._fire(c,e)}}}.bind(this),this._onWidthMessage=function(a){var b=parseInt(a);b!==this.parentWidth&&(this.parentWidth=b,this.settings.renderCallback&&this.settings.renderCallback(b),this.sendHeight())},this.sendMessage=function(a,b){window.parent.postMessage(f(this.id,a,b),"*")},this.sendHeight=function(){var a=document.getElementsByTagName("body")[0].offsetHeight.toString();return this.sendMessage("height",a),a}.bind(this),this.getParentPositionInfo=function(){this.sendMessage("parentPositionInfo")},this.scrollParentTo=function(a){this.sendMessage("navigateTo","#"+a)},this.navigateParentTo=function(a){this.sendMessage("navigateTo",a)},this.scrollParentToChildEl=function(a){var b=document.getElementById(a).getBoundingClientRect().top+window.pageYOffset;this.scrollParentToChildPos(b)},this.scrollParentToChildPos=function(a){this.sendMessage("scrollToChildPos",a.toString())};this.remove=function(){window.removeEventListener("message",this._processMessage),this.timerId&&clearInterval(this.timerId)};for(var e in a)this.settings[e]=a[e];this.id=c("childId")||a.id,this.messageRegex=new RegExp("^pymxPYMx"+this.id+"xPYMx(\\S+)xPYMx(.*)$");var g=parseInt(c("initialWidth"));return this.parentUrl=c(this.settings.parenturlparam),this.parentTitle=c("parentTitle"),this.onMessage("width",this._onWidthMessage),window.addEventListener("message",this._processMessage,!1),this.settings.renderCallback&&this.settings.renderCallback(g),this.sendHeight(),this.settings.polling&&(this.timerId=window.setInterval(this.sendHeight,this.settings.polling)),function(a){var c,d=document.getElementsByTagName("html")[0],e=d.className;try{c=window.self!==window.top?"embedded":"not-embedded"}catch(a){c="embedded"}e.indexOf(c)<0&&(d.className=e?e+" "+c:c,a&&a(c),b("marked-embedded"))}(a.onMarkedEmbeddedStatus),this},"undefined"!=typeof document&&a.autoInit(!0),a});
\ No newline at end of file
+/*! pym.js - v1.3.2 - 2018-02-13 || edited 2024-03-15 to lazy load iframes */
+!function(a){"function"==typeof define&&define.amd?define(a):"undefined"!=typeof module&&module.exports?module.exports=a():window.pym=a.call(this)}(function(){var a={},b=function(a){var b=document.createEvent("Event");b.initEvent("pym:"+a,!0,!0),document.dispatchEvent(b)},c=function(a){var b=new RegExp("[\\?&]"+a.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]")+"=([^&#]*)"),c=b.exec(location.search);return null===c?"":decodeURIComponent(c[1].replace(/\+/g," "))},d=function(a,b){if(("*"===b.xdomain||a.origin.match(new RegExp(b.xdomain+"$")))&&"string"==typeof a.data)return!0},e=function(a){var b=/^(?:(?:https?|mailto|ftp):|[^&:\/?#]*(?:[\/?#]|$))/gi;if(a.match(b))return!0},f=function(a,b,c){return["pym",a,b,c].join("xPYMx")},g=function(a){var b=["pym",a,"(\\S+)","(.*)"];return new RegExp("^"+b.join("xPYMx")+"$")},h=Date.now||function(){return(new Date).getTime()},i=function(a,b,c){var d,e,f,g=null,i=0;c||(c={});var 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this.messageHandlers||(this.messageHandlers[a]=[]),this.messageHandlers[a].push(b)},this.sendMessage=function(a,b){this.el.getElementsByTagName("iframe").length&&(this.el.getElementsByTagName("iframe")[0].contentWindow?this.el.getElementsByTagName("iframe")[0].contentWindow.postMessage(f(this.id,a,b),"*"):this.remove())},this.sendWidth=function(){var a=this.el.offsetWidth.toString();this.sendMessage("width",a)},this.sendViewportAndIFramePosition=function(){var a=this.iframe.getBoundingClientRect(),b=window.innerWidth||document.documentElement.clientWidth,c=window.innerHeight||document.documentElement.clientHeight,d=b+" "+c;d+=" "+a.top+" "+a.left,d+=" "+a.bottom+" "+a.right,this.sendMessage("viewport-iframe-position",d)};for(var h in c)this.settings[h]=c[h];return this._throttleOnScroll=i(this._onScroll.bind(this),this.settings.scrollwait),this.onMessage("height",this._onHeightMessage),this.onMessage("navigateTo",this._onNavigateToMessage),this.onMessage("scrollToChildPos",this._onScrollToChildPosMessage),this.onMessage("parentPositionInfo",this.sendViewportAndIFramePosition),window.addEventListener("message",this._processMessage,!1),this._constructIframe(),this},a.Child=function(a){this.parentWidth=null,this.id=null,this.parentTitle=null,this.parentUrl=null,this.settings={renderCallback:null,xdomain:"*",polling:0,parenturlparam:"parentUrl"},this.timerId=null,this.messageRegex=null,this.messageHandlers={},a=a||{},this.onMessage=function(a,b){a in this.messageHandlers||(this.messageHandlers[a]=[]),this.messageHandlers[a].push(b)},this._fire=function(a,b){if(a in this.messageHandlers)for(var c=0;c<this.messageHandlers[a].length;c++)this.messageHandlers[a][c].call(this,b)},this._processMessage=function(a){if(d(a,this.settings)&&"string"==typeof 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b=document.getElementById(a).getBoundingClientRect().top+window.pageYOffset;this.scrollParentToChildPos(b)},this.scrollParentToChildPos=function(a){this.sendMessage("scrollToChildPos",a.toString())};this.remove=function(){window.removeEventListener("message",this._processMessage),this.timerId&&clearInterval(this.timerId)};for(var e in a)this.settings[e]=a[e];this.id=c("childId")||a.id,this.messageRegex=new RegExp("^pymxPYMx"+this.id+"xPYMx(\\S+)xPYMx(.*)$");var g=parseInt(c("initialWidth"));return this.parentUrl=c(this.settings.parenturlparam),this.parentTitle=c("parentTitle"),this.onMessage("width",this._onWidthMessage),window.addEventListener("message",this._processMessage,!1),this.settings.renderCallback&&this.settings.renderCallback(g),this.sendHeight(),this.settings.polling&&(this.timerId=window.setInterval(this.sendHeight,this.settings.polling)),function(a){var c,d=document.getElementsByTagName("html")[0],e=d.className;try{c=window.self!==window.top?"embedded":"not-embedded"}catch(a){c="embedded"}e.indexOf(c)<0&&(d.className=e?e+" "+c:c,a&&a(c),b("marked-embedded"))}(a.onMarkedEmbeddedStatus),this},"undefined"!=typeof document&&a.autoInit(!0),a});
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