Columns block: Column width's percentage is NaN when using , character as decimal separator

[fluiddot]

Description

Looks like the percentage field only supports the . character as the decimal separator, using other characters like , leads to a NaN value. On iOS, depending on the device's region (in my case I used Spain), the keyboard only allows the option to use the , character as the decimal separator which prevents inputting decimal numbers (see attached screenshots).

Step-by-step reproduction instructions

1. Go to device settings and change the device's region to one that has a different decimal separator, like for example Spain. On iOS, this setting can be changed in Settings/General/Language & Region/Region.
2. Add a Columns block.
3. Open the block settings.
4. Tap on the width percentage of a column.
5. Input a decimal number using the , character separator.
6. Observe that the value is NaN.

Expected behaviour

The column widths' percentage should support the , decimal separator.

Actual behaviour

The column widths' percentage doesn't support the , decimal separator.

Screenshots or screen recording (optional)

Decimal character	NaN error

WordPress information

• WordPress version: N/A
• Gutenberg version: N/A
• Are all plugins except Gutenberg deactivated? N/A
• Are you using a default theme (e.g. Twenty Twenty-One)? N/A

Device information

• Device: iPhone 11
• Operating system: iOS 14.2
• WordPress app version: develop

[ceyhun]

Could be related to #33434. I had encountered the same with Button block and em value on that PR, but it was fixed before getting merged.

[fluiddot]

Could be related to #33434. I had encountered the same with Button block and em value on that PR, but it was fixed before getting merged.

Yeah, it's most likely related although the solution applied there looks didn't cover the case I mentioned. I see that for the Button radius field when I type the , character it's removed automatically, but that behavior is not replicated on the column width. In fact, I don't think we should discard the character but support convert decimals with the , character.