About HTML5's new feature placeholder on Firefox

Question

On Firefox:

console.log(document.createElement('input').placeholder === ''); // true

console.log(document.createElement('input').hasOwnProperty('placeholder')); // false

I think the 2nd line codes should return true just like what you can see on Chrome. But I get false. Why?

Thank you!

possible duplicate of http://stackoverflow.com/questions/5325205/how-come-there-is-a-difference-between-chrome-and-firefox-here — Oleg Mikheev, Feb 22 '12 at 10:49
also this is not about HTML5, it's the same just with any other attribute — Oleg Mikheev, Feb 22 '12 at 10:55

score 1 · Accepted Answer · answered Feb 22 '12 at 16:40

1

The spec defines the JS property as being on the prototype, not on the object itself. Chrome gets this wrong for all DOM properties; it's a longstanding bug in Chrome.

answered Feb 22 '12 at 16:40

Boris Zbarsky

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I think your answer is right! Thank you! This should be a WebKit's bug relevant its implementation to DOM. Safari also has this bug. – weilou Feb 23 '12 at 02:41

About HTML5's new feature placeholder on Firefox

1 Answers1