Skip to main content

Posts

Making vanilla web-fontend (project with lit, web component) secured (discussions with chatGpt)

Query: I wn complete seperate .css/.scss and .html template file for my webcomponent.js like in angular. But with complete security. In lit. Use any js lib like domPurify, etc. But I wan complete safety. How? ChatGPT said: Thought for 16s Totally doable. Here’s a secure Lit setup with fully separate .html + .scss files , sanitized with DOMPurify , and rendered into the Shadow DOM without sacrificing performance. Folder layout src / lib/ safe- html .js components/ app-shell .html app-shell .scss app-shell .js 1) Install deps npm i dompurify npm i -D sass Vite will compile .scss . We’ll import the compiled CSS as text and attach it via adoptedStyleSheets (fast + memory-friendly). 2) app-shell.html (pure template file) Put your Carbon UI Shell markup here (no scripts). Example stub: < cds-header aria-label = "My App" > < cds-header-name prefix = "IBM" >[Platform] </ cds-header-name > < cds-header-glo...

Notes: Install hplip in Ubuntu 22.04 along with plugin

 Commands are as follows: sudo apt update && sudo apt upgrade -y; sudo apt install software-properties-common apt-transport-https -y; sudo add-apt-repository ppa:kelebek333/hplip -y; sudo apt-get update; sudo apt-get install hplip hplip-gui -y; === Next you need to install respective plugins Check the version of hplip using command: dpkg -l hplip Then, download corresponding plugin file & .asc file that matches with version from link https://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/ Then in terminal, type: hp-plugin Then follow the GUI screen to install plugin.

Notes: Ubuntu-Libreoffice: Uninstall default Libreoffice provided with Ubuntu & install of your own

 Default Libreoffice that come with ubuntu don't have full version, like it don't have Libreoffice base. So one may need to uninstall default version & install full version of their own. Terminal command to uninstall Libreoffice completely is as follows: sudo apt-get update;sudo apt update sudo apt-get -y remove --purge libreoffice* libexttextcat-data* && sudo apt-get -y autoremove -- Terminal command to install Libreoffice full version after that is as follows sudo add-apt-repository ppa:libreoffice sudo apt install libreoffice -- Verify installed version libreoffice --version

Notes: Inverter purchasing calculations for home

 Take a list of items that will run in inverter like 2fans, 1 LED tubelight, 1 laptop, 2 LED TV, etc Now calcullate sum of their power e.g 2*60+1*20+100+2*100 WH=440 WH Now add 25% to above power sum e.g 440*125%=550WH Then multiply it by power factor (most case it's 1/0.8) e.g 550/.08=687.5 WH For every inverter has its own effeiency say 90%,80%, etc Therefore, inverter power that has to be purchased = 687.5/90%=763.888 VA Above is how to calculate inverter power that has to be purchased. ---- Now comes how to choose battery power Batter power (VA) =  Home Load * Backup (hrs)/Battery Vold = 687.5WH*2hr/12amp = 114.58 --- This is how you do calculations for purchasing invertor ========================= Bibliography

Ubuntu Notes: Solve E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem when trying to update ubuntu

This the problem you face when you try to upgrade or update ubuntu using command line, you get this message. Again when you run 'sudo dpkg --configure -a'  command you get error message like  dpkg: error: parsing file '/var/lib/dpkg/updates/0019' near line 0:  newline in field name '#padding' --- To solve this run command as follows cd /var/lib/dpkg/updates && sudo rm -rf <refNo>; sudo dpkg --configure -a; Like in above question case run command as follows cd /var/lib/dpkg/updates && sudo rm -rf 0019; sudo dpkg --configure -a; == Thats all & problem will be solved