July 12, 2026
First Development Log after returning from 3 week training session in Korea Army Training Center (논산훈련소).
- Link to the "HTML Tag Usages" document in dev_log_may.html is now fixed.
- Further description of the "srcset" and "sizes" attributes in the "HTML Tag Usages" document is added.
- New tags (object, embed) learned are added to the "HTML Tag Usages" document.
- Added new tags and its description in the tag usage page.
- Started working on the "CSS Usages" document.
July 13, 2026
Focused on Material Science Studies. Click to view.
July 14, 2026
Focused on Material Science Studies. Click to view.
July 15, 2026
Focused on Material Science Studies. Click to view.
July 16, 2026
Focused on Material Science Studies. Click to view.
July 17, 2026
Focused on Material Science Studies. Click to view.
July 18, 2026
Focused on Material Science Studies. Click to view.
July 19, 2026
Learned how to decorate text elements with CSS.
July 21, 2026
Learned how to decorate list & table elements with CSS.
July 22, 2026
Edited indication of block-level/inline level elements, tags with/without closing tags. Also edited some layouts of paragraphs.
July 23, 2026
Focused on chemistry. Find it here.
July 25, 2026
Studied a bit about CSS Box Model. Each element can be classified to inline elements and block level elements.
It is good to use only inline elements in <p> element.
Changed the design of css_usages.html and tag_usages.html by applying what I learned recently.
h1~h4 tags now has their own distinct color on its left-side borders to indicate the hierarchy more clearly.
July 27, 2026
About to finish learning about CSS Box Model. Block elements have content-box at center, surrounded with padding, border, margin box in given order.
Each box (content, padding, border, margin) has its own unique properties to render them.
You can also set background for elements. Gradation is another choice.
Meanwhile, Applied CSS to css_usages.html. Layout and Design have been improved.
Before

After

July 28, 2026
Learned about CSS media queries and how to use them for responsive design.