Shouldn't it throw or at least warn? Not sure how it works in 2.x tho

In the 2.x version, the template below:

<div>{{}}</div>

The delimiters will be considered plain text.

If the template is as follows:

<div>{{  }}</div>

Will generate empty text(''), but neither case throws an error or warn.

I see. Do i understand correctly it's a breaking change ({{}} => '' instead of {{}} => '{{}}')?

I'd say the current 2.x behavior is a bug.

Hey @HcySunYang, thank you for your time and effort spent on this PR, contributions like yours help make Vue better for everyone. Cheers! 💚