有人可以解释遵循代码的含义吗

发布于 2025-01-20 22:12:11 字数 337 浏览 1 评论 0 原文

function handleEnter(event) {
      if (event.key==="Enter") {
          const form = document.getElementById('form')
          const index = [...form].indexOf(event.target);
          form.elements[index + 1].focus();
        }
    }

按下Enter Enter Some Some Some Offer Inluce逐行解释我,该代码用于关注下一个输入字段?这将是很大的帮助

function handleEnter(event) {
      if (event.key==="Enter") {
          const form = document.getElementById('form')
          const index = [...form].indexOf(event.target);
          form.elements[index + 1].focus();
        }
    }

This code is use for focusing on next input field after pressing Enter somebody explain me this code line by line? it will be big help

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评论(3

娇纵 2025-01-27 22:12:11

第1行:

const form = document.getElementById('form')

从HTML行2获取DOM元素

const index = [...form].indexOf(event.target);

以“当前元素”索引以元素查找。我认为这行不正确,我想您想从表单元素中获取子元素,如果是这样,则应该是:

const index = form.children.indexOf(event.target);

第3行:

form.elements[index + 1].focus();

下一个元素应该是当前索引加1,所以只需运行 focus 在下一个元素上,但是正如我说的,我认为您的第2行是不正确的,因此该行应该是:

form.children[index + 1].focus();

Line 1:

const form = document.getElementById('form')

Get the DOM element from html

Line 2:

const index = [...form].indexOf(event.target);

Find in the form elements the index of the current element. I think this line is not correct, I suppose that you want to get child elements from the form element, if so, it should be something like:

const index = form.children.indexOf(event.target);

Line 3:

form.elements[index + 1].focus();

The next element should be the current index plus 1, so just run focus on next element, but as I said, I think that your line 2 is not correct so this line should be something like:

form.children[index + 1].focus();
爱给你人给你 2025-01-27 22:12:11

据我了解。
第二行:仅在按Enter键时,此功能才能执行
第三行:从表单输入(“形式” ID)获取信息
第四行:获取表单输入的索引
第五行:将焦点移动到下一个元素(index+1)

As I understand.
2nd line : This funct will perform only when press Enter key
3rd line : get information from the form input ("form" ID)
4th line : get the index of the form input
5th line : move the focus point to the next element (which is index+1)

一城柳絮吹成雪 2025-01-27 22:12:11

兄弟,了解此代码非常容易,您只需要分解它即可。
让我们从它开始: -

  • 首先是JavaScript函数,其中HTML事件作为参数传递。
  • 第二个检查触发的事件是否为输入密钥事件
  • 如果是的,则将执行下一个语句,以 form 为id选择元素。
  • 现在,将从表单当前输入字段的所有输入字段中选择。
  • 最后,焦点的元素索引是增量,将焦点转移到表单中的下一个输入字段。

Bro, understanding this code is quite easy you just need to break it down.
Let's start with it :-

  • First it is JavaScript function in which html event is passed as argument.
  • Second checks whether the event that is triggered is enter key event
  • If yes, then the next statement will be executed that will select element with form as id.
  • Now from the all the input fields of form current input field will be selected.
  • At last, the index of element that is focus is increment that will shift the focus to next input field in the form.
~没有更多了~
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