It'll be nice to have it since all modern browsers already support it. For those who don't know what I'm talking about, container queries and container query length units allow a text element to change it's font size relative to it's parent element.

For example, you can have a responsive text element occupying 100% of the parent container's width, to always stay the same without breaking or overflowing on window resize. Same behavior as if the text was an SVG element with object-fit: contain. All this without any JS of any sort.

These are the units:

• cqw: 1% of a query container's width

• cqh: 1% of a query container's height

• cqi: 1% of a query container's inline size

• cqb: 1% of a query container's block size

• cqmin: The smaller value of either cqi or cqb

• cqmax: The larger value of either cqi or cqb