2020-02-16 标签:javascript,实现,代码,如下,function,n,ode,tagname,var,elements,i,anytag,ext,firstchild,odetype,odename,extsibling

实现代码如下：function getElementsByTagName(node, tagName) { var elements = [], i = 0, anyTag = tagName === "*", next = node.firstChild; while ((node = next)