getElementsByClassName recursion
getElementsByClassName recursion
本文关键字:recursion getElementsByClassName 更新时间:2023-09-26
我一直在尝试实现一个行为与DOM方法完全相似的getElementsByClassName函数。通过大量的研究,我得出了以下结论,但似乎返回的内容与标准方法返回的内容不匹配。最后一个console.log
语句似乎打印了我要查找的内容,但不知何故,返回的内容有所不同。如有任何建议或帮助,我们将不胜感激!
var getElementsByClassName = function(className){
var results= [];
var bod = document.body;
var iterateBod = function(bod){
if(bod.classList && bod.classList.contains(className)){
results.push(bod);
console.log(results)
}else{
for(var i = 0; i < bod.childNodes.length; i++){
iterateBod(bod.childNodes[i]);
}
}
};
iterateBod(bod);
console.log(results);
return results;
};
更改递归内的条件
var getElementsByClassName = function(className){
var results= [];
var bod = document.body;
var iterateBod = function(bod){
if(bod.classList && bod.classList.contains(className))
{
results.push(bod);
console.log(results);
if(bod.childNodes)
{
for(var i = 0; i < bod.childNodes.length; i++)
{
iterateBod(bod.childNodes[i]);
}
}
}
};
iterateBod(bod);
console.log(results);
return results;
};
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