La risposta di Roland Bouman è il modo migliore e semplice di Vaniglia. Ho notato alcuni tentativi di plug-in jQ, ma non mi sono sembrati abbastanza "pieni", quindi l'ho fatto da solo. L'unica battuta d'arresto finora è stata l'impossibilità di accedere agli attrs aggiunti dinamicamente senza chiamare direttamente elm.attr('dynamicAttr'). Tuttavia, questo restituirà tutti gli attributi naturali di un oggetto jQuery.
Il plugin utilizza una semplice chiamata in stile jQuery:
$(elm).getAttrs();
// OR
$.getAttrs(elm);
Puoi anche aggiungere un secondo parametro stringa per ottenere solo un attr specifico. Questo non è davvero necessario per la selezione di un elemento, poiché jQuery fornisce già $(elm).attr('name'), tuttavia, la mia versione di un plugin consente più ritorni. Quindi, ad esempio, una chiamata come
$.getAttrs('*', 'class');
Si tradurrà in un []ritorno di array di oggetti {}. Ogni oggetto sarà simile a:
{ class: 'classes names', elm: $(elm), index: i } // index is $(elm).index()
Collegare
;;(function($) {
$.getAttrs || ($.extend({
getAttrs: function() {
var a = arguments,
d, b;
if (a.length)
for (x in a) switch (typeof a[x]) {
case "object":
a[x] instanceof jQuery && (b = a[x]);
break;
case "string":
b ? d || (d = a[x]) : b = $(a[x])
}
if (b instanceof jQuery) {
var e = [];
if (1 == b.length) {
for (var f = 0, g = b[0].attributes, h = g.length; f < h; f++) a = g[f], e[a.name] = a.value;
b.data("attrList", e);
d && "all" != d && (e = b.attr(d))
} else d && "all" != d ? b.each(function(a) {
a = {
elm: $(this),
index: $(this).index()
};
a[d] = $(this).attr(d);
e.push(a)
}) : b.each(function(a) {
$elmRet = [];
for (var b = 0, d = this.attributes, f = d.length; b < f; b++) a = d[b], $elmRet[a.name] = a.value;
e.push({
elm: $(this),
index: $(this).index(),
attrs: $elmRet
});
$(this).data("attrList", e)
});
return e
}
return "Error: Cannot find Selector"
}
}), $.fn.extend({
getAttrs: function() {
var a = [$(this)];
if (arguments.length)
for (x in arguments) a.push(arguments[x]);
return $.getAttrs.apply($, a)
}
}))
})(jQuery);
Aderito
;;(function(c){c.getAttrs||(c.extend({getAttrs:function(){var a=arguments,d,b;if(a.length)for(x in a)switch(typeof a[x]){case "object":a[x]instanceof jQuery&&(b=a[x]);break;case "string":b?d||(d=a[x]):b=c(a[x])}if(b instanceof jQuery){if(1==b.length){for(var e=[],f=0,g=b[0].attributes,h=g.length;f<h;f++)a=g[f],e[a.name]=a.value;b.data("attrList",e);d&&"all"!=d&&(e=b.attr(d));for(x in e)e.length++}else e=[],d&&"all"!=d?b.each(function(a){a={elm:c(this),index:c(this).index()};a[d]=c(this).attr(d);e.push(a)}):b.each(function(a){$elmRet=[];for(var b=0,d=this.attributes,f=d.length;b<f;b++)a=d[b],$elmRet[a.name]=a.value;e.push({elm:c(this),index:c(this).index(),attrs:$elmRet});c(this).data("attrList",e);for(x in $elmRet)$elmRet.length++});return e}return"Error: Cannot find Selector"}}),c.fn.extend({getAttrs:function(){var a=[c(this)];if(arguments.length)for(x in arguments)a.push(arguments[x]);return c.getAttrs.apply(c,a)}}))})(jQuery);
/* BEGIN PLUGIN */
;;(function($) {
$.getAttrs || ($.extend({
getAttrs: function() {
var a = arguments,
c, b;
if (a.length)
for (x in a) switch (typeof a[x]) {
case "object":
a[x] instanceof f && (b = a[x]);
break;
case "string":
b ? c || (c = a[x]) : b = $(a[x])
}
if (b instanceof f) {
if (1 == b.length) {
for (var d = [], e = 0, g = b[0].attributes, h = g.length; e < h; e++) a = g[e], d[a.name] = a.value;
b.data("attrList", d);
c && "all" != c && (d = b.attr(c));
for (x in d) d.length++
} else d = [], c && "all" != c ? b.each(function(a) {
a = {
elm: $(this),
index: $(this).index()
};
a[c] = $(this).attr(c);
d.push(a)
}) : b.each(function(a) {
$elmRet = [];
for (var b = 0, c = this.attributes, e = c.length; b < e; b++) a = c[b], $elmRet[a.name] = a.value;
d.push({
elm: $(this),
index: $(this).index(),
attrs: $elmRet
});
$(this).data("attrList", d);
for (x in $elmRet) $elmRet.length++
});
return d
}
return "Error: Cannot find Selector"
}
}), $.fn.extend({
getAttrs: function() {
var a = [$(this)];
if (arguments.length)
for (x in arguments) a.push(arguments[x]);
return $.getAttrs.apply($, a)
}
}))
})(jQuery);
/* END PLUGIN */
/*--------------------*/
$('#bob').attr('bob', 'bill');
console.log($('#bob'))
console.log(new Array(50).join(' -'));
console.log($('#bob').getAttrs('id'));
console.log(new Array(50).join(' -'));
console.log($.getAttrs('#bob'));
console.log(new Array(50).join(' -'));
console.log($.getAttrs('#bob', 'name'));
console.log(new Array(50).join(' -'));
console.log($.getAttrs('*', 'class'));
console.log(new Array(50).join(' -'));
console.log($.getAttrs('p'));
console.log(new Array(50).join(' -'));
console.log($('#bob').getAttrs('all'));
console.log($('*').getAttrs('all'));
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
All of below is just for stuff for plugin to test on. See developer console for more details.
<hr />
<div id="bob" class="wmd-button-bar"><ul id="wmd-button-row-27865269" class="wmd-button-row" style="display:none;">
<div class="post-text" itemprop="text">
<p>Roland Bouman's answer is the best, simple Vanilla way. I noticed some attempts at jQ plugs, but they just didn't seem "full" enough to me, so I made my own. The only setback so far has been inability to access dynamically added attrs without directly calling <code>elm.attr('dynamicAttr')</code>. However, this will return all natural attributes of a jQuery element object.</p>
<p>Plugin uses simple jQuery style calling:</p>
<pre class="default prettyprint prettyprinted"><code><span class="pln">$</span><span class="pun">(</span><span class="pln">elm</span><span class="pun">).</span><span class="pln">getAttrs</span><span class="pun">();</span><span class="pln">
</span><span class="com">// OR</span><span class="pln">
$</span><span class="pun">.</span><span class="pln">getAttrs</span><span class="pun">(</span><span class="pln">elm</span><span class="pun">);</span></code></pre>
<p>You can also add a second string param for getting just one specific attr. This isn't really needed for one element selection, as jQuery already provides <code>$(elm).attr('name')</code>, however, my version of a plugin allows for multiple returns. So, for instance, a call like</p>
<pre class="default prettyprint prettyprinted"><code><span class="pln">$</span><span class="pun">.</span><span class="pln">getAttrs</span><span class="pun">(</span><span class="str">'*'</span><span class="pun">,</span><span class="pln"> </span><span class="str">'class'</span><span class="pun">);</span></code></pre>
<p>Will result in an array <code>[]</code> return of objects <code>{}</code>. Each object will look like:</p>
<pre class="default prettyprint prettyprinted"><code><span class="pun">{</span><span class="pln"> </span><span class="kwd">class</span><span class="pun">:</span><span class="pln"> </span><span class="str">'classes names'</span><span class="pun">,</span><span class="pln"> elm</span><span class="pun">:</span><span class="pln"> $</span><span class="pun">(</span><span class="pln">elm</span><span class="pun">),</span><span class="pln"> index</span><span class="pun">:</span><span class="pln"> i </span><span class="pun">}</span><span class="pln"> </span><span class="com">// index is $(elm).index()</span></code></pre>
</div>
</div>