使用jQuery选择和更改类的属性？

Question

I've highlighted the class which I want to change one of its attributes...

How to select and change the opacity attribute and change it to 0.1 using jQuery?

I've tried this with no success...

var item = $('.slide-object slide-object-stategroup shown')

$(item).attr( 'opacity' ): 0.1;

Answer 1

1. Your selector is wrong.
2. The way you are changing opacity is wrong.

See the code below:

var item = $('.slide-object.slide-object-stategroup.shown')
$(item).css( 'opacity', 0.1);

Use .css method to change any css property. Also classes needs to have a . before their name. Spaces in selector means you are accessing the child. So remove the spaces and add a dot in the selector.