Why Does `zoom: 1` Work in Older IE Versions?

The Utility of Zoom:1 in CSS

Question:

Many HTML elements are modified by the CSS property zoom: 1;. What is the rationale behind this practice, and which issue does it resolve?

Answer:

In Internet Explorer versions 7 and prior, the zoom:1 property sets an internal characteristic known as hasLayout.

The article "On having layout" explains this concept: http://www.satzansatz.de/cssd/onhavinglayout.html. It highlights that "layout" is a Microsoft Internet Explorer concept that affects an element's design, interaction, and response to events.

Specifying zoom:1 (and subsequently hasLayout) is particularly useful for addressing certain bugs in Internet Explorer, such as:

Specific Bug Example:

Inlineブロックがinternet explorer 7,6で機能しない（Inline block doesn't work in internet explorer 7, 6）

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