Problem when selecting and trying to detect if it is bold, italic or both in textarea

[Inbydev]

Visual of the problem

text added:
*test*

detected:
Italic

correct detection:
Italic

Visual:

text added:
**test**

detected:
Bold and Italic

correct detection:
Bold

Visual:

text added:
***test***

detected:
Bold and Italic

correct detection:
Bold and Italic

Visual:

The problem is in the second case, because it only needs to detect bold and not italics.

I think it's for this part of the code word.js:

function containsItalic(text) {
    return text.includes("*");
}

function containsBold(text) {
    return text.includes("**");
}

need a better solution, but I really don't know what to do to fix it.