在jQuery中选择具有特定ID的特定元素类型

Question

I want to find any canvas elements with the id whatever using jQuery. I thought I could do $('canvas #whatever') but that doesn't return anything when I have a canvas with that id on the page.

Answer 1

Your selector will return an element that is a canvas's child. Doing $('#whatever') should already return what you expect, since IDs should be unique in a page.

Anyway, if you really want to be more specific, the correct way to retrieve a canvas with this ID is to remove your space there: $('canvas#whatever')

Answer 2

Try this, $('canvas#whatever')

This should work.

Answer 3

if you want multiple elements with the same identifier use classes and then reference it $("canvas .yourclass"). I'm not sure if thats what's causing your issue but if its not a unique ID it's not right.

Answer 4

Try class = whatever instead, seems to work better. Canvases with the same Id behave strangely.

 $('.whatever').css('background-color','green'); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <canvas class="whatever" width="50px" height="50px"></canvas> <canvas class="whatever" width="50px" height="50px"></canvas> <canvas class="whatever" width="50px" height="50px"></canvas> 

Answer 5

The empty space you leave after the element type implies that the following selector concerns children of that element. You need to keep the whole selector tight together, no spaces.

$('canvas#whatever')

Answer 6

Try this

$('canvas#whatever')

or

$('canvas[id=whatever]')