Mozilla 도움말 검색

고객 지원 사기를 피하세요. 저희는 여러분께 절대로 전화를 걸거나 문자를 보내거나 개인 정보를 공유하도록 요청하지 않습니다. "악용 사례 신고"옵션을 사용하여 의심스러운 활동을 신고해 주세요.

자세히 살펴보기

document.getElementsByTagName(...)[11] is undefined

more options

Hi team

i am trying to get the value of an element. var a=[]; a=document.getElementsByTagName("select")[11].options; a[0].text this code works fine in chrome's console but it does not work in firefox.

Infact, when i use document.getElementById("id").text it gives error as document.getElementById("id") is undefined. Please help me with this issue

Hi team i am trying to get the value of an element. var a=[]; a=document.getElementsByTagName("select")[11].options; a[0].text this code works fine in chrome's console but it does not work in firefox. Infact, when i use document.getElementById("id").text it gives error as document.getElementById("id") is undefined. Please help me with this issue
첨부된 스크린샷

모든 댓글 (9)

more options

Can you provide a working example of this issue on jsfiddle.net or codepen.io ?

more options

Do you have at least 12 <select> controls in the page?

What is the value of

document.getElementsByTagName("select").length
more options

@jscher2000, document.getElementsByTagName("select").length returns 43 in chrome however same code in firefox returns 2.

I do not understand why it is so

more options

@jscher2000, document.getElementsByTagName("select").length returns 43 in chrome however same code in firefox returns 2.

I do not understand why it is so

more options

That's a good question. Are you doing anything fancy with iframes or shadow DOM that could affect the scope of "document"?

more options

@jscher2000, yes, there is iframe and inside iframe, i have the content which i am trying to access

more options

I don't have a good sense of whether your script is running in the right document. Maybe a demo is the best next step:

TyDraniu said

Can you provide a working example of this issue on jsfiddle.net or codepen.io ?
more options

If you type/paste document.getElementsByTagName("select") in the Web Console and press Enter that you should see the DOM tree for these elements as an array that you can expand for inspection, so you can see if the correct element is found.

more options

Hi Team

i got it fixed other way..Thank you for your help