defineProperties(Element.prototype, {
querySelector: {
value: querySelectorPatched,
writable: true,
enumerable: true,
configurable: true,
},
querySelectorAll: {
value(this: HTMLBodyElement): NodeListOf<Element> {
const nodeList = arrayFromCollection(
elementQuerySelectorAll.apply(this, ArraySlice.call(arguments) as [string])
);
if (!featureFlags.ENABLE_NODE_LIST_PATCH) {
const filteredResults = getFilteredArrayOfNodes(
this,
nodeList,
ShadowDomSemantic.Disabled
);
return createStaticNodeList(filteredResults);
}
return createStaticNodeList(
getFilteredArrayOfNodes(this, nodeList, ShadowDomSemantic.Enabled)
);
},
writable: true,
enumerable: true,
configurable: true,
},
});
I am intrigued by the portion of code presented in the TypeScript snippet below:
value(this: HTMLBodyElement): NodeListOf<Element>
In my interpretation, it appears that this section is replacing the default querySelectorAll method. However, the method is being implemented on an Element, while specifying this as HTMLBodyElement within the function. Does this indicate that the method can solely be invoked from a body element? Alternatively, could it be called from an Element and subsequently casted to HTMLBodyElement? Could someone provide insight into the rationale behind this code snippet? The context of this code segment can be found in the following repository.