I'm curious, what exactly does "ideal size" refer to in the CSS spec level 3?

Lately, I have been immersing myself in CSS educational resources and delving into the CSS spec. The concept of "ideal size" has caught my attention a few times. I'm not sure if it's a strictly technical term or more informal.

My interpretation of "ideal size" is like "the size an element desires to be most when not restricted in any way". But I'm still uncertain.

Is there an official definition for this term? Could someone provide a close approximation of its meaning?

cssflexboxcss-grid

Answer №1

Essentially, it is similar to using the max-content property.

div {
  width: max-content;
  outline: 1px solid red;
  margin: 10px;
}
<div>some text</div>

<div>more text here</div>

When a box has infinite space available in a given axis, its "ideal" size is determined. Typically, this ideal size is the smallest possible while still enclosing its contents and minimizing unused space to prevent overflow.

The goal is to avoid overflow and wasted space, although this can be more complicated in certain scenarios.

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