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<script> async, defer, async defer, module, nomodule, src, inline - the cheat sheet

With the addition of ES modules, there's now no fewer than 24 ways to load your JS code: (inline|not inline) x (defer|no defer) x (async|no async) x (type=text/javascript | type=module | nomodule) -- and each of them is subtly different.

This document is a comparison of various ways the <script> tags in HTML are processed depending on the attributes set.

If you ever wondered when to use inline <script async type="module"> and when <script nomodule defer src="...">, you're in the good place!

Note that this article is about <script>s inserted in the HTML; the behavior of <script>s inserted at runtime is slightly different - see Deep dive into the murky waters of script loading by Jake Archibald (2013)

nucliweb

if (HTMLScriptElement.supports?.('speculationrules')) {
    const specScript = document.createElement('script')
    specScript.type = 'speculationrules'
    const specRules = {
        prerender: [{
            urls: ['/next.html'],
        }, ],
    }
    specScript.textContent = JSON.stringify(specRules)
    document.body.append(specScript)

nucliweb

How Browsers Work

• How browsers work
• Inside look at modern web browser, Part 1
• Inside look at modern web browser, Part 2
• Inside look at modern web browser, Part 3
• Inside look at modern web browser, Part 4

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# place this after nvm initialization!
autoload -U add-zsh-hook

load-nvmrc() {
  local nvmrc_path
  nvmrc_path="$(nvm_find_nvmrc)"

  if [ -n "$nvmrc_path" ]; then
    local nvmrc_node_version
    nvmrc_node_version=$(nvm version "$(cat "${nvmrc_path}")")

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## Requisites
## fzf https://github.com/junegunn/fzf
## jq https://jqlang.github.io/jq/

_nr () {
  local cmd
  local TASK=$(npm run | egrep  '^\s' | awk '{gsub(/ /,""); print}' | awk 'NR%2==1' | fzf --preview 'jq .scripts package.json' | awk '{gsub(/ /,""); print}')
  if [ -n "$TASK" ]; then
    cmd="npm run \"$TASK\""
    eval "$cmd" & 

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A curated list of command-line utilities written in Rust

Note: I have moved this list to a proper repository. I'll leave this gist up, but it won't be updated. To submit an idea, open a PR on the repo.

Note that I have not tried all of these personally, and cannot and do not vouch for all of the tools listed here. In most cases, the descriptions here are copied directly from their code repos. Some may have been abandoned. Investigate before installing/using.

The ones I use regularly include: bat, dust, fd, fend, hyperfine, miniserve, ripgrep, just, cargo-audit and cargo-wipe.

• atuin: "Magical shell history"
• bandwhich: Terminal bandwidth utilization tool

nucliweb

Convert MP4 file to animated WEBP file in ffmpeg CLI

1. Install ffmpeg CLI through homebrew

In terminal.app, install ffmpeg through homebrew

brew install ffmpeg

Validate the installation:

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/**
 * A bookmarklet for viewing shifted elements while debugging
 * Cumulative Layout Shift (web.dev/cls). Works in Chrome 84+
 * Shows the previous position of shifted elements in yellow,
 * and the new position in red.
 *
 * To install:
 * 1. Copy the code starting from the line beginning `javascript:`
 * 2. Add a new bookmark in Chrome, and paste the code in as the URL.
 **/

nucliweb

#!/bin/bash
set -x #echo on
remote_url=$(git config --get remote.origin.url)
for branch in $(git branch --all | grep '^\s*remotes' | egrep --invert-match '(:?HEAD|master)$'); do
		branch_name=$(echo $branch| cut -d'/' -f 3)
    git clone -b $branch_name $remote_url $branch_name
done

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📺 OpenCV C++ Mac M1 Installation Tutorial Video

Commands you need

We need homebrew installed in our system

brew install cmake

mkdir Open_CV && cd Open_CV