jquery-nearby: jQuery Nearby Plugin

Which HTML Attribute do I hate the most? That is id. I wrote this to avoid querying element by id.

This is a jQuery plugin to find the element matching a selector that is somewhere nearby :-)

Image a scenario of User Mobile Binding:

<form class="form-horizontal">
    <div class="form-group">
        <label class="col-xs-2 control-label" for="binding-mobile">
            手机号码：
        </label>
        <div class="col-xs-9">
            <input class="form-control" id="binding-mobile" type="tel" placeholder="手机号码"
                   name="mobile"/>
            <input class="form-control" id="binding-smscode" placeholder="验证码"
                   name="smscode"/>
            <button class="btn btn-link" type="button" id="js-smscode">
                <span class="state normal">获取验证码</span>
                <span class="state alter"><span class="code" data-bind="cooldown">0</span>秒后可重新获取</span>
            </button>
        </div>
    </div>
</form>

Use Jquery Nearby to help you:

var $element=$("#js-smscode");//the base point of searching

$element.nearby(1);  //equals to `.siblings(":eq(1)")`
$element.nearby("#binding-mobile");
$element.nearby('input[name="mobile"]');
$element.nearby("mobile");  // equals to `.nearby("[name=mobile]")`

The above all found #binding-mobile element. Especially the .nearby(name) form works gracefully, Simple string parameter that test failed with /^#/ or /[.[>~:]/ is considered to name, EXCEPT:

body|form|select|input|textarea|div|span|h\d|table|tr|td|th|p|header|section|fieldset

Jquery Nearby find out the target through these steps:

If parameter is int then just call .siblings(":eq()") instead.
Else if parameter is start with # then find global document. (Contains same id in one page is your fault :<)
Else find from closest .form-group.
If find nothing, go more far, and find from closest form context.
If find nothing, continue findind from closest .dialog context.
Finally, find from global document. You can specify a searching order by the second parameter.

$element.nearby("mobile", [".form","#myDialog"]);

So at last Jquery Nearby WON'T return undefined|null|false , it returns EMPTY JQUERY object if found nothing.

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