如何将CSS应用于使用append（）创建的元素

Question

I am trying to change the text colour of certain options in a but it is not working. none are red

    var style="color:red" 
    $('#newuserSelect')
        .append($('<option>', {
                value: "0",
                title: "hello",
                style: style
            })
            .text("my text"));

http://jsfiddle.net/ZDYEd/ the colour is black when it should be red

Answer 1

The property name to use is "css", not "style". Also the value should be an object whose properties are the CSS properties to set.

$('#newuserSelect')
    .append($('<option>', {
            value: "0",
            title: "hello",
            css: { color: "red" }
        })
        .text("my text"));

You can, incidentally set the text with that initialization object too:

$('#newuserSelect')
    .append($('<option>', {
            value: "0",
            title: "hello",
            css: { color: "red" },
            text: "my text"
        })
    );

Now, this does work , but it's important to note that when you're looking at the page with the <select> element not "open", you're not looking at the <option> elements. If you want the selected text to be red, then you need to also style the <select> element itself. When there's only one <option> , the <select> cannot be "opened" so you never see the style of the <option> .

I can't recall exactly but it may be the case that IE, or old versions of it anyway, won't pay attention to styles on <option> elements. IE <select> was implemented in a really weird way in old versions.

Answer 2

Actually, $(xyz).append(abc) will return the object of xyz not abc . And by the way, The proper way to set the css for an element is to use .css() function. Please read here for full reference.

So I would suggest you to use .appendTo in your current context. That will fit your need. Unlike .append() , .appendTo() will return the object of xyz [ $(xyz).appendTo(abc) ]

Try this,

$('<option>', { value: "0", title: "hello" })
.appendTo('#newuserSelect')
.text('my text')
.css({color:'red'});

DEMO

Answer 3

Why calling jQuery to create this tiny piece of HTML?

$('#newuserSelect').append(
    '<option value="0" title="hello" style="color:red">my text</option>'
);

Answer 4

Your JavaScript is fine. You can't color individual options with CSS. This is the output of your original fiddle!

Edited: CSS Text color not taking effect in Chrome 31 for OSX Mavericks