获取formData附加的数据

I have a new FormData then added caption as key.

var formData = new FormData();
formData.append('caption','abc');

How do I get abc from it? I tried using .get but it's not supported in mobile chrome.

formData.get('caption'); // this will not work by default in chrome. 

Is there anywhere I can get caption value?

By default Chome does not support the .get() method, you can enable that functionality by activating an flag.

Chrome default support for method append.

Methods which chrome does't support in default behavior : delete, get, getAll, has, and set.

For activating flags in Chrome you can go to the following link:

chrome://flags/#enable-experimental-webkit-features