[英]What is the plain Javascript equivalent of .each and $(this) when used together like in this example?
[英]What's the equivalent of this in plain JavaScript?
$('<span class="pictos">j</span>').prependTo('li');
var li = document.getElementsByTagName('li');
for (var i = 0; i < li.length; i++) {
var e = document.createElement('span');
e.className = 'pictos';
e.appendChild(document.createTextNode('j'));
li[i].insertBefore(e, li[i].firstChild);
}
jQuery实际要做的是获取元素并为需要附加到其上的每个父元素克隆它,这样会更快一些,如下所示:
var span = document.createElement('span');
span.className = 'pictos';
span.appendChild(document.createTextNode('j'));
var lis = document.getElementsByTagName('li');
for (var i = 0; i < lis.length; i++) {
lis[i].insertBefore(span.cloneNode(true), lis[i].firstChild);
}
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