Create DOM element from jQuery selector

问题

I was wondering if it were possible to, instead of selecting an element from the DOM via a jQuery selector, if I can create one instead.

For example:

$.create('#hello').insertAfter('#test');

would generate the following:

<div id="test">This element already existed in the DOM.</div>
<div id="hello"></div>

Or, better yet, for more complex operations:

$.create('#test.a.b');

for:

<div id="test" class="a b"></div>

Obviously, more complex operations like :selected or :nth-child or :not() and all of those need not be implemented.

Is anyone aware of a solution?

Thanks.

回答1:

To create <div id="hello"></div>

try

$('<div id="hello"></div>').appendTo('body');

To create <div id="test" class="a b"></div> same as

$('<div id="test" class="a b"></div>').appendTo('body');

$('<div id="test" class="a b"></div>') will create new element but not add it to DOM.

To add that element you need to use append() or appendTo() or insetAfter() or insertBefore() and so on.

It is better to use a function to:

function createElement(el, target) {
   $(el).appendTo(target);
}

use the function like:

createElement('<div id="test" class="a b"></div>', 'body');

You can also append newly created element to any other target instead of body.

I think following function will help you:

function createElement(el, prop, target) {
  var props = prop.split('.'),
      newelement = $(el),
      id = '',
      className = '';
    $.each(props, function(i, val) {
        if(val.indexOf('#') >= 0) {
           id += val.replace(/^#/, '');
        } else {
           className += val + ' ';
        }
    });
    if(id.length) newelement.attr('id', id);
    if(className.length) newelement.attr('class', className.trim());

    $(newelement).html('Newly born').appendTo(target);
}

createElement('div', '#test.a.b', '#con'); // will work for #test.a.b or, .a.b or, #test.a

DEMO

回答2:

I actually created one earlier, still a little buggy, but would work for the case you are thinking of, just using it like

$.jseldom('#test.a.b')

and you can even use it with sibling selector

$.jseldom('#test #abc .child +.sibling-of-child')

https://github.com/shekhei/jseldom

use it if you find it useful, and report all the issues there :P I am really hoping to make it into something that would benefit people :)

回答3:

I don't see something out there that would create elements off of css selector syntax. JQuery does let you create and add elements, but the syntax is not based off of the css selectors as in your example. For instance to add a #hello div with class a and b after the #test div, you can use .after():

$('#test').after("<div id='hello' class='a b'>Hello</div>");

jsfiddle: http://jsfiddle.net/septerr/RmAW6/

$('#test').after('<div>Hello</div>').attr('id', 'hello').addClass('a').addclass('b');

jsfiddle: http://jsfiddle.net/septerr/EQjLE/

回答4:

Just insert the html tags into it

$("<div id='hello'></div>")

See here for further details jQuery document.createElement equivalent?

来源：https://stackoverflow.com/questions/10586678/create-dom-element-from-jquery-selector

标签

jquery

dom

selector