Javascript 错误：无法读取未定义的属性“替换”
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Error : Cannot read property 'replace' of undefined
提问by Ridho Fauzan
I have javascript code and got an error Cannot read property 'replace' of undefined. Can anyone please help me to solve this? This is my code, and I currently using jQuery 2.1.3.
我有 javascript 代码并收到错误无法读取 undefined 的属性“替换”。任何人都可以帮我解决这个问题吗？这是我的代码，我目前使用 jQuery 2.1.3。
ExpandableTable.prototype.updateInputBoxName=function(){
$("."+this.cloneClass,this.target).each(function(j,t){
var n=j+1;
$("input,textarea",$(t)).each(function(i,v){
if($(v).attr("name")!=""){
var newName=$(v).attr("name").replace(/\d+$/,"")+n;
$(v).attr("name",newName);
}
});
});
return this
};
ExpandableTable.prototype.updateInputBoxId=function(){
var t=this;
$("."+t.cloneClass,this.target).each(function(j,u){
var n=j+1;
$("input,textarea",$(u)).each(function(i,v){
if($(v).attr("id")!=""){
var newId=$(v).attr("id").replace(/\d+$/,"")+n;
$(v).removeAttr("id").attr("id",newId);
}
});
});
return this
};
it says i have an error on .replace.
它说我在.replace上有错误。
Please help me to solve this
请帮我解决这个问题
采纳答案by DGS
Your if statement needs to check that $(v).attr("id")is not undefined
您的 if 语句需要检查$(v).attr("id")是否未定义
if ($(v).attr("id") != "" && typeof $(v).attr("id") != 'undefined') {
Should stop that error.
应该停止那个错误。
As MinusFour said if ($(v).attr("id"))is less verbose and achieves the same thing.
正如 MinusFour 所说if ($(v).attr("id"))的那样不那么冗长并实现了同样的事情。
