Difference between getElementByID and querySelector
Assume you have a valid HTML element in DOM. I assumed the following snippets to be the same. let id = "037e3778-e157-4715-bff5-e466230fe7a3" const byId = document.getElementById(id) console.log(byId) // works const bySelectorConcat = document.querySelector("#" + id) console.log(bySelectorConcat) // Uncaught DOMException: Failed to execute 'querySelector' on 'Document': '#037e3778-e157-4715-bff5-e
Safe DOM manipulation with the Sanitizer API  | Articles  | web.dev
const user_input = `<em>hello world</em><img src="" onerror=alert(0)>` $div.innerHTML = user_input If you escape HTML special characters in the input string above or expand it using .textContent, alert(0) will not be executed. However, since <em> added by the user is also expanded as a string as it is, this method cannot be used in order to keep the text decoration in HTML. The best thing to do he
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Use a MutationObserver to Handle DOM Nodes that Don’t Exist Yet
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