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The two links originally posted by are useful historical references; was right to ask for discussion instead of just link-dumping. The short primer below condenses the practical, year‑later takeaways about IE's internal "hasLayout" behavior and gives the minimal fixes that actually mattered in production.

hasLayout is an internal boolean in old versions of Internet Explorer (Trident engine; chiefly IE5–IE7 and some compatibility modes) that changes how an element sizes, contains floats, and participates in flow. Symptoms that point to hasLayout issues include parents not containing floated children, collapsed/incorrect heights, doubled margins on floats, and disappearing or clipped content.

Common triggers (useful to force or recognize):

  • setting an explicit width or height
  • applying float or position: absolute
  • overflow other than visible (hidden, auto)
  • nonstandard properties like zoom or certain filter usages

Typical fixes and examples:

  • Force hasLayout when a parent must contain floats:
    
/* legacy IE fix */
.container { zoom: 1; }

/ modern preferred clearfix /
.clearfix::after {
content: "";
display: table;
clear: both;
}


- Fix IE6 double-margin on floated elements with `display: inline;` on the floated item.
- `overflow:hidden` also forces layout but can clip children; use carefully.

Cautions and modern advice: hasLayout is a legacy IE quirk. For current projects prefer clearfixes, flexbox, or grid. If maintenance for old IE is unavoidable, keep hacks scoped to IE‑only rules or conditional styles and test in the actual IE versions that matter.

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Member Avatar for tgreer

I welcome your participation in the HTML, CSS, & JavaScript forum. Many of the links you've posted are interesting. However, the main purpose of the forum is discussion. Rather than simply posting links, I'd appreciate it if you'd provide some commentary about the links, such as your opinions, questions, etc.

Also, when someone joins a forum, it's implied that they'll do their fair share of question ANSWERING. Please review some of the active threads and try to provide some relevant input.

Otherwise, you'll give the impression that your real motive for posting is just to provide an excuse to show your signature line. While Daniweb extends this courtesy to members who've made at least 10 posts, merely posting links isn't quite in the spirit of things!

Member Avatar for ! !

Good Bye HTML, CSS & JavaScript Forum - there will never be another visit, post or "link" made here again

Member Avatar for tgreer

That's up to you. I sincerely hoped you'd stay and contribute.

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