Add the onvisible event handler to Element (#2911)

* Add the `onvisible` event using the IntersectionObserver

* Add a visible example

This example is based on https://codepen.io/ryanfinni/pen/VwZeGxN

* Remove web-sys CustomEvent feature for html package

* update js bindings and hash

* Use dioxus doc instead of lorem ipsum

* Fix clippy warning

* Add get_target method to the event data

* Make `get_time` return an Instant instead of a f64

* fix merge conflicts, compilinga

* remove target

* small nits

* serialzie as time_ms

* fix timing, works on desktop

* remove latent nits, fix hash

* box size clippy

* fix browserlist cargo.lock

---------

Co-authored-by: Evan Almloff <evanalmloff@gmail.com>
Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/interpreter/src/js/core.js

@@ -1 +1 @@
-function setAttributeInner(node,field,value,ns){if(ns==="style"){node.style.setProperty(field,value);return}if(ns){node.setAttributeNS(ns,field,value);return}switch(field){case"value":if(node.value!==value)node.value=value;break;case"initial_value":node.defaultValue=value;break;case"checked":node.checked=truthy(value);break;case"initial_checked":node.defaultChecked=truthy(value);break;case"selected":node.selected=truthy(value);break;case"initial_selected":node.defaultSelected=truthy(value);break;case"dangerous_inner_html":node.innerHTML=value;break;default:if(!truthy(value)&&isBoolAttr(field))node.removeAttribute(field);else node.setAttribute(field,value)}}var truthy=function(val){return val==="true"||val===!0},isBoolAttr=function(field){switch(field){case"allowfullscreen":case"allowpaymentrequest":case"async":case"autofocus":case"autoplay":case"checked":case"controls":case"default":case"defer":case"disabled":case"formnovalidate":case"hidden":case"ismap":case"itemscope":case"loop":case"multiple":case"muted":case"nomodule":case"novalidate":case"open":case"playsinline":case"readonly":case"required":case"reversed":case"selected":case"truespeed":case"webkitdirectory":return!0;default:return!1}};class BaseInterpreter{global;local;root;handler;resizeObserver;nodes;stack;templates;m;constructor(){}initialize(root,handler=null){this.global={},this.local={},this.root=root,this.nodes=[root],this.stack=[root],this.templates={},this.handler=handler}handleResizeEvent(entry){const target=entry.target;let event=new CustomEvent("resize",{bubbles:!1,detail:entry});target.dispatchEvent(event)}createObserver(element){if(!this.resizeObserver)this.resizeObserver=new ResizeObserver((entries)=>{for(let entry of entries)this.handleResizeEvent(entry)});this.resizeObserver.observe(element)}removeObserver(element){if(this.resizeObserver)this.resizeObserver.unobserve(element)}createListener(event_name,element,bubbles){if(bubbles)if(this.global[event_name]===void 0)this.global[event_name]={active:1,callback:this.handler},this.root.addEventListener(event_name,this.handler);else this.global[event_name].active++;else{const id=element.getAttribute("data-dioxus-id");if(!this.local[id])this.local[id]={};element.addEventListener(event_name,this.handler)}if(event_name=="resize")this.createObserver(element)}removeListener(element,event_name,bubbles){if(bubbles)this.removeBubblingListener(event_name);else this.removeNonBubblingListener(element,event_name)}removeBubblingListener(event_name){if(this.global[event_name].active--,this.global[event_name].active===0)this.root.removeEventListener(event_name,this.global[event_name].callback),delete this.global[event_name]}removeNonBubblingListener(element,event_name){const id=element.getAttribute("data-dioxus-id");if(delete this.local[id][event_name],Object.keys(this.local[id]).length===0)delete this.local[id];element.removeEventListener(event_name,this.handler)}removeAllNonBubblingListeners(element){const id=element.getAttribute("data-dioxus-id");delete this.local[id]}getNode(id){return this.nodes[id]}pushRoot(node){this.stack.push(node)}appendChildren(id,many){const root=this.nodes[id],els=this.stack.splice(this.stack.length-many);for(let k=0;k<many;k++)root.appendChild(els[k])}loadChild(ptr,len){let node=this.stack[this.stack.length-1],ptr_end=ptr+len;for(;ptr<ptr_end;ptr++){let end=this.m.getUint8(ptr);for(node=node.firstChild;end>0;end--)node=node.nextSibling}return node}saveTemplate(nodes,tmpl_id){this.templates[tmpl_id]=nodes}hydrate_node(hydrateNode,ids){const split=hydrateNode.getAttribute("data-node-hydration").split(","),id=ids[parseInt(split[0])];if(this.nodes[id]=hydrateNode,split.length>1){hydrateNode.listening=split.length-1,hydrateNode.setAttribute("data-dioxus-id",id.toString());for(let j=1;j<split.length;j++){const split2=split[j].split(":"),event_name=split2[0],bubbles=split2[1]==="1";this.createListener(event_name,hydrateNode,bubbles)}}}hydrate(ids,underNodes){for(let i=0;i<underNodes.length;i++){const under=underNodes[i];if(under instanceof HTMLElement){if(under.getAttribute("data-node-hydration"))this.hydrate_node(under,ids);const hydrateNodes=under.querySelectorAll("[data-node-hydration]");for(let i2=0;i2<hydrateNodes.length;i2++)this.hydrate_node(hydrateNodes[i2],ids)}const treeWalker=document.createTreeWalker(under,NodeFilter.SHOW_COMMENT);while(treeWalker.currentNode){const currentNode=treeWalker.currentNode;if(currentNode.nodeType===Node.COMMENT_NODE){const id=currentNode.textContent,placeholderSplit=id.split("placeholder");if(placeholderSplit.length>1){if(this.nodes[ids[parseInt(placeholderSplit[1])]]=currentNode,!treeWalker.nextNode())break;continue}const textNodeSplit=id.split("node-id");if(textNodeSplit.length>1){let next=currentNode.nextSibling;currentNode.remove();let commentAfterText,textNode;if(next.nodeType===Node.COMMENT_NODE){const newText=next.parentElement.insertBefore(document.createTextNode(""),next);commentAfterText=next,textNode=newText}else textNode=next,commLine truncated
+function setAttributeInner(node,field,value,ns){if(ns==="style"){node.style.setProperty(field,value);return}if(ns){node.setAttributeNS(ns,field,value);return}switch(field){case"value":if(node.value!==value)node.value=value;break;case"initial_value":node.defaultValue=value;break;case"checked":node.checked=truthy(value);break;case"initial_checked":node.defaultChecked=truthy(value);break;case"selected":node.selected=truthy(value);break;case"initial_selected":node.defaultSelected=truthy(value);break;case"dangerous_inner_html":node.innerHTML=value;break;default:if(!truthy(value)&&isBoolAttr(field))node.removeAttribute(field);else node.setAttribute(field,value)}}var truthy=function(val){return val==="true"||val===!0},isBoolAttr=function(field){switch(field){case"allowfullscreen":case"allowpaymentrequest":case"async":case"autofocus":case"autoplay":case"checked":case"controls":case"default":case"defer":case"disabled":case"formnovalidate":case"hidden":case"ismap":case"itemscope":case"loop":case"multiple":case"muted":case"nomodule":case"novalidate":case"open":case"playsinline":case"readonly":case"required":case"reversed":case"selected":case"truespeed":case"webkitdirectory":return!0;default:return!1}};class BaseInterpreter{global;local;root;handler;resizeObserver;intersectionObserver;nodes;stack;templates;m;constructor(){}initialize(root,handler=null){this.global={},this.local={},this.root=root,this.nodes=[root],this.stack=[root],this.templates={},this.handler=handler}handleResizeEvent(entry){const target=entry.target;let event=new CustomEvent("resize",{bubbles:!1,detail:entry});target.dispatchEvent(event)}createResizeObserver(element){if(!this.resizeObserver)this.resizeObserver=new ResizeObserver((entries)=>{for(let entry of entries)this.handleResizeEvent(entry)});this.resizeObserver.observe(element)}removeResizeObserver(element){if(this.resizeObserver)this.resizeObserver.unobserve(element)}handleIntersectionEvent(entry){const target=entry.target;let event=new CustomEvent("visible",{bubbles:!1,detail:entry});target.dispatchEvent(event)}createIntersectionObserver(element){if(!this.intersectionObserver)this.intersectionObserver=new IntersectionObserver((entries)=>{for(let entry of entries)this.handleIntersectionEvent(entry)});this.intersectionObserver.observe(element)}removeIntersectionObserver(element){if(this.intersectionObserver)this.intersectionObserver.unobserve(element)}createListener(event_name,element,bubbles){if(event_name=="resize")this.createResizeObserver(element);else if(event_name=="visible")this.createIntersectionObserver(element);if(bubbles)if(this.global[event_name]===void 0)this.global[event_name]={active:1,callback:this.handler},this.root.addEventListener(event_name,this.handler);else this.global[event_name].active++;else{const id=element.getAttribute("data-dioxus-id");if(!this.local[id])this.local[id]={};element.addEventListener(event_name,this.handler)}}removeListener(element,event_name,bubbles){if(event_name=="resize")this.removeResizeObserver(element);else if(event_name=="visible")this.removeIntersectionObserver(element);else if(bubbles)this.removeBubblingListener(event_name);else this.removeNonBubblingListener(element,event_name)}removeBubblingListener(event_name){if(this.global[event_name].active--,this.global[event_name].active===0)this.root.removeEventListener(event_name,this.global[event_name].callback),delete this.global[event_name]}removeNonBubblingListener(element,event_name){const id=element.getAttribute("data-dioxus-id");if(delete this.local[id][event_name],Object.keys(this.local[id]).length===0)delete this.local[id];element.removeEventListener(event_name,this.handler)}removeAllNonBubblingListeners(element){const id=element.getAttribute("data-dioxus-id");delete this.local[id]}getNode(id){return this.nodes[id]}pushRoot(node){this.stack.push(node)}appendChildren(id,many){const root=this.nodes[id],els=this.stack.splice(this.stack.length-many);for(let k=0;k<many;k++)root.appendChild(els[k])}loadChild(ptr,len){let node=this.stack[this.stack.length-1],ptr_end=ptr+len;for(;ptr<ptr_end;ptr++){let end=this.m.getUint8(ptr);for(node=node.firstChild;end>0;end--)node=node.nextSibling}return node}saveTemplate(nodes,tmpl_id){this.templates[tmpl_id]=nodes}hydrate_node(hydrateNode,ids){const split=hydrateNode.getAttribute("data-node-hydration").split(","),id=ids[parseInt(split[0])];if(this.nodes[id]=hydrateNode,split.length>1){hydrateNode.listening=split.length-1,hydrateNode.setAttribute("data-dioxus-id",id.toString());for(let j=1;j<split.length;j++){const split2=split[j].split(":"),event_name=split2[0],bubbles=split2[1]==="1";this.createListener(event_name,hydrateNode,bubbles)}}}hydrate(ids,underNodes){for(let i=0;i<underNodes.length;i++){const under=underNodes[i];if(under instanceof HTMLElement){if(under.getAttribute("data-node-hydration"))this.hydrate_node(under,ids);const hydrateNodes=under.querySelectorAll("[data-node-hydration]");for(let i2=0;i2<hydrateNodes.length;i2++)this.hydrate_node(hydrateNLine truncated

packages/interpreter/src/js/hash.txt

@@ -1 +1 @@
-[6449103750905854967, 4461869229701639737, 13069001215487072322, 8716623267269178440, 5336385715226370016, 14456089431355876478, 7422899642446454418, 5052021921702764563, 17534315583914394253, 5638004933879392817]
+[6449103750905854967, 5429983586723452597, 13069001215487072322, 8716623267269178440, 5336385715226370016, 14456089431355876478, 7422899642446454418, 5052021921702764563, 12925655762638175824, 5638004933879392817]

packages/interpreter/src/js/native.js

@@ -1 +1 @@
-function retrieveValues(event,target){let contents={values:{}},form=target.closest("form");if(form){if(event.type==="input"||event.type==="change"||event.type==="submit"||event.type==="reset"||event.type==="click")contents=retrieveFormValues(form)}return contents}function retrieveFormValues(form){const formData=new FormData(form),contents={};return formData.forEach((value,key)=>{if(contents[key])contents[key].push(value);else contents[key]=[value]}),{valid:form.checkValidity(),values:contents}}function retrieveSelectValue(target){let options=target.selectedOptions,values=[];for(let i=0;i<options.length;i++)values.push(options[i].value);return values}function serializeEvent(event,target){let contents={},extend=(obj)=>contents={...contents,...obj};if(event instanceof WheelEvent)extend(serializeWheelEvent(event));if(event instanceof MouseEvent)extend(serializeMouseEvent(event));if(event instanceof KeyboardEvent)extend(serializeKeyboardEvent(event));if(event instanceof InputEvent)extend(serializeInputEvent(event,target));if(event instanceof PointerEvent)extend(serializePointerEvent(event));if(event instanceof AnimationEvent)extend(serializeAnimationEvent(event));if(event instanceof TransitionEvent)extend({property_name:event.propertyName,elapsed_time:event.elapsedTime,pseudo_element:event.pseudoElement});if(event instanceof CompositionEvent)extend({data:event.data});if(event instanceof DragEvent)extend(serializeDragEvent(event));if(event instanceof FocusEvent)extend({});if(event instanceof ClipboardEvent)extend({});if(event instanceof CustomEvent){const detail=event.detail;if(detail instanceof ResizeObserverEntry)extend(serializeResizeEventDetail(detail))}if(typeof TouchEvent!=="undefined"&&event instanceof TouchEvent)extend(serializeTouchEvent(event));if(event.type==="submit"||event.type==="reset"||event.type==="click"||event.type==="change"||event.type==="input")extend(serializeInputEvent(event,target));if(event instanceof DragEvent);return contents}var toSerializableResizeObserverSize=function(size,is_inline_width){return[is_inline_width?size.inlineSize:size.blockSize,is_inline_width?size.blockSize:size.inlineSize]};function serializeResizeEventDetail(detail){let is_inline_width=!0;if(detail.target instanceof HTMLElement){if(window.getComputedStyle(detail.target).getPropertyValue("writing-mode")!=="horizontal-tb")is_inline_width=!1}return{border_box_size:detail.borderBoxSize!==void 0?toSerializableResizeObserverSize(detail.borderBoxSize[0],is_inline_width):detail.contentRect,content_box_size:detail.contentBoxSize!==void 0?toSerializableResizeObserverSize(detail.contentBoxSize[0],is_inline_width):detail.contentRect,content_rect:detail.contentRect}}var serializeInputEvent=function(event,target){let contents={};if(target instanceof HTMLElement){let values=retrieveValues(event,target);contents.values=values.values,contents.valid=values.valid}if(event.target instanceof HTMLInputElement){let target2=event.target,value=target2.value??target2.textContent??"";if(target2.type==="checkbox")value=target2.checked?"true":"false";else if(target2.type==="radio")value=target2.value;contents.value=value}if(event.target instanceof HTMLTextAreaElement)contents.value=event.target.value;if(event.target instanceof HTMLSelectElement)contents.value=retrieveSelectValue(event.target).join(",");if(contents.value===void 0)contents.value="";return contents},serializeWheelEvent=function(event){return{delta_x:event.deltaX,delta_y:event.deltaY,delta_z:event.deltaZ,delta_mode:event.deltaMode}},serializeTouchEvent=function(event){return{alt_key:event.altKey,ctrl_key:event.ctrlKey,meta_key:event.metaKey,shift_key:event.shiftKey,changed_touches:event.changedTouches,target_touches:event.targetTouches,touches:event.touches}},serializePointerEvent=function(event){return{alt_key:event.altKey,button:event.button,buttons:event.buttons,client_x:event.clientX,client_y:event.clientY,ctrl_key:event.ctrlKey,meta_key:event.metaKey,page_x:event.pageX,page_y:event.pageY,screen_x:event.screenX,screen_y:event.screenY,shift_key:event.shiftKey,pointer_id:event.pointerId,width:event.width,height:event.height,pressure:event.pressure,tangential_pressure:event.tangentialPressure,tilt_x:event.tiltX,tilt_y:event.tiltY,twist:event.twist,pointer_type:event.pointerType,is_primary:event.isPrimary}},serializeMouseEvent=function(event){return{alt_key:event.altKey,button:event.button,buttons:event.buttons,client_x:event.clientX,client_y:event.clientY,ctrl_key:event.ctrlKey,meta_key:event.metaKey,offset_x:event.offsetX,offset_y:event.offsetY,page_x:event.pageX,page_y:event.pageY,screen_x:event.screenX,screen_y:event.screenY,shift_key:event.shiftKey}},serializeKeyboardEvent=function(event){return{char_code:event.charCode,is_composing:event.isComposing,key:event.key,alt_key:event.altKey,ctrl_key:event.ctrlKey,meta_key:event.metaKey,key_code:event.keyCode,shift_key:event.shiftKey,location:event.location,repeat:event.repeat,which:event.which,code:event.code}},serializeAnimationELine truncated
+function retrieveValues(event,target){let contents={values:{}},form=target.closest("form");if(form){if(event.type==="input"||event.type==="change"||event.type==="submit"||event.type==="reset"||event.type==="click")contents=retrieveFormValues(form)}return contents}function retrieveFormValues(form){const formData=new FormData(form),contents={};return formData.forEach((value,key)=>{if(contents[key])contents[key].push(value);else contents[key]=[value]}),{valid:form.checkValidity(),values:contents}}function retrieveSelectValue(target){let options=target.selectedOptions,values=[];for(let i=0;i<options.length;i++)values.push(options[i].value);return values}function serializeEvent(event,target){let contents={},extend=(obj)=>contents={...contents,...obj};if(event instanceof WheelEvent)extend(serializeWheelEvent(event));if(event instanceof MouseEvent)extend(serializeMouseEvent(event));if(event instanceof KeyboardEvent)extend(serializeKeyboardEvent(event));if(event instanceof InputEvent)extend(serializeInputEvent(event,target));if(event instanceof PointerEvent)extend(serializePointerEvent(event));if(event instanceof AnimationEvent)extend(serializeAnimationEvent(event));if(event instanceof TransitionEvent)extend({property_name:event.propertyName,elapsed_time:event.elapsedTime,pseudo_element:event.pseudoElement});if(event instanceof CompositionEvent)extend({data:event.data});if(event instanceof DragEvent)extend(serializeDragEvent(event));if(event instanceof FocusEvent)extend({});if(event instanceof ClipboardEvent)extend({});if(event instanceof CustomEvent){const detail=event.detail;if(detail instanceof ResizeObserverEntry)extend(serializeResizeEventDetail(detail));else if(detail instanceof IntersectionObserverEntry)extend(serializeIntersectionEventDetail(detail))}if(typeof TouchEvent!=="undefined"&&event instanceof TouchEvent)extend(serializeTouchEvent(event));if(event.type==="submit"||event.type==="reset"||event.type==="click"||event.type==="change"||event.type==="input")extend(serializeInputEvent(event,target));if(event instanceof DragEvent);return contents}var toSerializableResizeObserverSize=function(size,is_inline_width){return[is_inline_width?size.inlineSize:size.blockSize,is_inline_width?size.blockSize:size.inlineSize]};function serializeResizeEventDetail(detail){let is_inline_width=!0;if(detail.target instanceof HTMLElement){if(window.getComputedStyle(detail.target).getPropertyValue("writing-mode")!=="horizontal-tb")is_inline_width=!1}return{border_box_size:detail.borderBoxSize!==void 0?toSerializableResizeObserverSize(detail.borderBoxSize[0],is_inline_width):detail.contentRect,content_box_size:detail.contentBoxSize!==void 0?toSerializableResizeObserverSize(detail.contentBoxSize[0],is_inline_width):detail.contentRect,content_rect:detail.contentRect}}function serializeIntersectionEventDetail(detail){return{bounding_client_rect:detail.boundingClientRect,intersection_ratio:detail.intersectionRatio,intersection_rect:detail.intersectionRect,is_intersecting:detail.isIntersecting,root_bounds:detail.rootBounds,time_ms:Math.floor(Date.now()+detail.time)}}var serializeInputEvent=function(event,target){let contents={};if(target instanceof HTMLElement){let values=retrieveValues(event,target);contents.values=values.values,contents.valid=values.valid}if(event.target instanceof HTMLInputElement){let target2=event.target,value=target2.value??target2.textContent??"";if(target2.type==="checkbox")value=target2.checked?"true":"false";else if(target2.type==="radio")value=target2.value;contents.value=value}if(event.target instanceof HTMLTextAreaElement)contents.value=event.target.value;if(event.target instanceof HTMLSelectElement)contents.value=retrieveSelectValue(event.target).join(",");if(contents.value===void 0)contents.value="";return contents},serializeWheelEvent=function(event){return{delta_x:event.deltaX,delta_y:event.deltaY,delta_z:event.deltaZ,delta_mode:event.deltaMode}},serializeTouchEvent=function(event){return{alt_key:event.altKey,ctrl_key:event.ctrlKey,meta_key:event.metaKey,shift_key:event.shiftKey,changed_touches:event.changedTouches,target_touches:event.targetTouches,touches:event.touches}},serializePointerEvent=function(event){return{alt_key:event.altKey,button:event.button,buttons:event.buttons,client_x:event.clientX,client_y:event.clientY,ctrl_key:event.ctrlKey,meta_key:event.metaKey,page_x:event.pageX,page_y:event.pageY,screen_x:event.screenX,screen_y:event.screenY,shift_key:event.shiftKey,pointer_id:event.pointerId,width:event.width,height:event.height,pressure:event.pressure,tangential_pressure:event.tangentialPressure,tilt_x:event.tiltX,tilt_y:event.tiltY,twist:event.twist,pointer_type:event.pointerType,is_primary:event.isPrimary}},serializeMouseEvent=function(event){return{alt_key:event.altKey,button:event.button,buttons:event.buttons,client_x:event.clientX,client_y:event.clientY,ctrl_key:event.ctrlKey,meta_key:event.metaKey,offset_x:event.offsetX,offset_y:event.offsetY,page_x:event.pageX,page_y:event.pageY,Line truncated

packages/interpreter/src/ts/core.ts

@@ -20,6 +20,7 @@ export class BaseInterpreter {
   root: HTMLElement;
   handler: EventListener;
   resizeObserver: ResizeObserver;
+  intersectionObserver: IntersectionObserver;
 
   nodes: Node[];
   stack: Node[];
@@ -55,7 +56,7 @@ export class BaseInterpreter {
     target.dispatchEvent(event);
   }
 
-  createObserver(element: HTMLElement) {
+  createResizeObserver(element: HTMLElement) {
     // Lazily create the resize observer
     if (!this.resizeObserver) {
       this.resizeObserver = new ResizeObserver((entries) => {
@@ -67,13 +68,48 @@ export class BaseInterpreter {
     this.resizeObserver.observe(element);
   }
 
-  removeObserver(element: HTMLElement) {
+  removeResizeObserver(element: HTMLElement) {
     if (this.resizeObserver) {
       this.resizeObserver.unobserve(element);
     }
   }
 
+  handleIntersectionEvent(entry: IntersectionObserverEntry) {
+    const target = entry.target;
+
+    let event = new CustomEvent<IntersectionObserverEntry>("visible", {
+      bubbles: false,
+      detail: entry,
+    });
+
+    target.dispatchEvent(event);
+  }
+
+  createIntersectionObserver(element: HTMLElement) {
+    /// Lazily create the intersection observer
+    if (!this.intersectionObserver) {
+      this.intersectionObserver = new IntersectionObserver((entries) => {
+        for (const entry of entries) {
+          this.handleIntersectionEvent(entry);
+        }
+      });
+    }
+    this.intersectionObserver.observe(element);
+  }
+
+  removeIntersectionObserver(element: HTMLElement) {
+    if (this.intersectionObserver) {
+      this.intersectionObserver.unobserve(element);
+    }
+  }
+
   createListener(event_name: string, element: HTMLElement, bubbles: boolean) {
+    if (event_name == "resize") {
+      this.createResizeObserver(element);
+    } else if (event_name == "visible") {
+      this.createIntersectionObserver(element);
+    }
+
     if (bubbles) {
       if (this.global[event_name] === undefined) {
         this.global[event_name] = { active: 1, callback: this.handler };
@@ -88,14 +124,14 @@ export class BaseInterpreter {
       }
       element.addEventListener(event_name, this.handler);
     }
-
-    if (event_name == "resize") {
-      this.createObserver(element);
-    }
   }
 
   removeListener(element: HTMLElement, event_name: string, bubbles: boolean) {
-    if (bubbles) {
+    if (event_name == "resize") {
+      this.removeResizeObserver(element);
+    } else if (event_name == "visible") {
+      this.removeIntersectionObserver(element);
+    } else if (bubbles) {
       this.removeBubblingListener(event_name);
     } else {
       this.removeNonBubblingListener(element, event_name);

packages/interpreter/src/ts/serialize.ts

@@ -62,6 +62,8 @@ export function serializeEvent(
     const detail = event.detail;
     if (detail instanceof ResizeObserverEntry) {
       extend(serializeResizeEventDetail(detail));
+    } else if (detail instanceof IntersectionObserverEntry) {
+      extend(serializeIntersectionEventDetail(detail));
     }
   }
 
@@ -129,21 +131,36 @@ export function serializeResizeEventDetail(
     border_box_size:
       detail.borderBoxSize !== undefined
         ? toSerializableResizeObserverSize(
-            detail.borderBoxSize[0],
-            is_inline_width
-          )
+          detail.borderBoxSize[0],
+          is_inline_width
+        )
         : detail.contentRect,
     content_box_size:
       detail.contentBoxSize !== undefined
         ? toSerializableResizeObserverSize(
-            detail.contentBoxSize[0],
-            is_inline_width
-          )
+          detail.contentBoxSize[0],
+          is_inline_width
+        )
         : detail.contentRect,
     content_rect: detail.contentRect,
   };
 }
 
+export function serializeIntersectionEventDetail(
+  detail: IntersectionObserverEntry): SerializedEvent {
+  return {
+    bounding_client_rect: detail.boundingClientRect,
+    intersection_ratio: detail.intersectionRatio,
+    intersection_rect: detail.intersectionRect,
+    is_intersecting: detail.isIntersecting,
+    root_bounds: detail.rootBounds,
+
+    // math.floor removes the floating point extra such that we serialize into integer
+    // this *might* become an issue longer term
+    time_ms: Math.floor(Date.now() + detail.time),
+  }
+}
+
 function serializeInputEvent(
   event: InputEvent,
   target: EventTarget