Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
151 views
in Technique[技术] by (71.8m points)

javascript - How can I add an option in the beginning?

I have html select,

<select id="myselect">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>

I need to add new option in this select. If I try like this:

$('#myselect').appendTo($('<option>my-option</option>')); 

the my-option have added to the end

<select id="myselect">
    <option>1</option>
    <option>2</option>
    <option>3</option>
    <option>my-option</option>
</select>

How can I add an option in the beginning (as first)? Like this:

<select id="myselect">
    <option>my-option</option>
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

First, you mean append, rather than appendTo. append adds the content of the parameter to the selection; appendTo appends the selection to the element designated in the parameter.

Second, perhaps intuitively, you can use prepend:

$('#myselect').prepend($('<option>my-option</option>')); 

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...