Web defacing

Snippets

JavaScript

Grabbing an element

const titleElement = document.getElementById("my-title");

Editing the content

titleElement.innerHTML = "🙃";

Creating an element

const newListItem = document.createElement("li");
// Set the content
newListItem.innerHTML = "Add an element using JavaScript";

Insert an element

// Grab the element that we want to insert the new element into.
const list = document.getElementById("my-list");
// Append the new element
list.appendChild(newListItem);

Resources

Browser extension template [about:debugging#/runtime/this-firefox Reload extension page (FireFox)]