Accessibility

• ARIA Authoring Practices Guide by W3C®
• Document and Website Structure by Mozilla MDN

Coding

• regexr.com by gskinner.com

Design

• Squoosh by Google
• unDraw by Katerina Limpitsouni

This is a collection of simple snippets that I have found to be useful and that I keep using.
By publishing them here I'm making it easy for myself to find them, and maybe for others as well.

Highlight headings

By running this snippet in any browser's console you can highlight the heading of any website.

// run in the browser's console

console.groupCollapsed("Page headings");

[1, 2, 3, 4, 5, 6].forEach((headingLevel) => {
  document.querySelectorAll(`h${headingLevel}`).forEach((headingNode) => {
    console.log(headingNode);

    headingNode.style.outline = "1px solid purple";

    const span = document.createElement("span");

    span.innerText = `H${headingLevel}`;
    span.style.backgroundColor = "purple";
    span.style.color = "white";
    span.style.marginRight = "0.25rem";

    headingNode.prepend(span);
  });
});

console.groupEnd();

Mark as viewed/not viewed on GitHub

These snippets are really helpful when going through large code reviews in GitHub.
You don't need to click the viewed checkbox for each file, you just run a snippet.

// Mark all as viewed
document.querySelectorAll(".js-reviewed-checkbox").forEach((elem) => {
  if (elem.checked) return;
  let clickEvent = new MouseEvent("click");
  elem.dispatchEvent(clickEvent);
});

// Mark all as not viewed
document.querySelectorAll(".js-reviewed-checkbox").forEach((elem) => {
  if (!elem.checked) return;
  let clickEvent = new MouseEvent("click");
  elem.dispatchEvent(clickEvent);
});