Orthography – Is ‘Chuse’ a Spelling Mistake or Historical Spelling?

Wrappable. (Google Ngrams data.)

A more common example, closely analogous to wrappable, is slappable.

Generally, when a short vowel (like the a of wrap) occurs in the last syllable of a verb, the consonant following it gets doubled in conjugated forms: thus wrap -> wrapping, wrapped, and so on; similarly, fit -> fitting, fitted, …

Conjugated forms with single consonants usually come from verbs ending with a long vowel and silent e. So rapping comes from rap, but raping comes from rape; bidding comes from bid, but biding from bide.

According to this Google Ngram, both E-Commerce and E-commerce are valid and interchangeable:

Likewise, when not beginning a sentence (or in a headline, etc.), the term e-commerce is not capitalized:

e-commerce |ˈēˌkämərs|:

(noun) commercial transactions conducted electronically on the Internet.

See what happens when e-commerce is added to the Ngram.

According to Wikipedia, eCommerce is a viable, though less often used alternative. The Ngram supports that assertion. The only variation which is completely incorrect is ECommerce.

Definition from: New Oxford American Dictionary

Conclusion:

• E-Commerce is almost always hyphenated. The only non-hyphenated alternative is eCommerce.
• Furthermore, e-commerce is not capitalized unless one begins a sentence with it, or uses it in a headline/title.
• When capitalized, both E-commerce and E-Commerce are correct, though I prefer the latter.