是否可以使用JavaScript focus()函数来关注 ?[英]Is it possible to focus on a using JavaScript focus() function? 本文翻译自 OM The Eternity 查看原文 2010-09-07 220448 focus/

Is it possible to focus on a <div> using JavaScript focus() function?

是否可以使用JavaScript focus()函数来关注

I have a <div> tag

我有一个

标签

<div id="tries">You have 3 tries left</div>

I am trying to focus on the above <div> using :

我正试图集中在上面的

使用:

document.getElementById('tries').focus();

But it doesn't work. Could someone suggest something....?

但它不工作。有人建议....吗?

8 个解决方案

#1

window.location.hash = '#tries';

This will scroll to the element in question, essentially "focus"ing it.

这将滚动到问题中的元素，本质上是“聚焦”它。

#2

314

Yes - this is possible. In order to do it, you need to assign a tabindex...

是的——这是可能的。为了做到这一点，您需要分配一个表索引……

<div tabindex="0">Hello World</div>

A tabindex of 0 will put the tag "in the natural tab order of the page". A higher number will give it a specific order of priority, where 1 will be the first, 2 second and so on.

tabindex(0)将标签“按照页面的自然制表符顺序”放置。更高的数字将赋予它一个特定的优先级顺序，其中1将是第一个，2秒等等。

You can also give a tabindex of -1, which will make the div only focus-able by script, not the user.

您还可以给出-1的tabindex，这将使div只能由脚本而不是用户来实现。

document.getElementById('test').onclick = function () {
    document.getElementById('scripted').focus();
};

div:focus {
    background-color: Aqua;
}

<div>Element X (not focusable)</div>
<div tabindex="0">Element Y (user or script focusable)</div>
<div tabindex="-1" id="scripted">Element Z (script-only focusable)</div>
<div id="test">Set Focus To Element Z</div>

Obviously, it is a shame to have an element you can focus by script that you can't focus by other input method (especially if a user is keyboard only or similarly constrained). There are also a whole bunch of standard elements that are focusable by default and have semantic information baked in to assist users. Use this knowledge wisely.

显然，有一个元素可以通过脚本集中，而其他的输入方法不能集中，这是一种遗憾(特别是如果用户只是键盘或类似的限制)。还有一大堆标准元素是默认可调焦的，并且包含语义信息以帮助用户。明智地使用这些知识。

#3

document.getElementById('tries').scrollIntoView() works. This works better than window.location.hash when you have fixed positioning.

. getelementbyid(试).scrollIntoView()的工作原理。这比window.location更好。当你有固定的定位时哈希。

#4

<div id="inner" tabindex="0">
    this div can now have focus and receive keyboard events
</div>

#5

You can use tabindex

您可以使用tabindex

<div tabindex="-1"></div>

The tabindex value can allow for some interesting behaviour.

tabindex值可以允许一些有趣的行为。

If given a value of "-1", the element can't be tabbed to but focus can be given to the element programmatically (using element.focus()).
如果给定一个值为“-1”，则不能将元素制表为-1，但是可以通过编程方式将焦点赋给元素(使用element.focus()))。
If given a value of 0, the element can be focused via the keyboard and falls into the tabbing flow of the document. Values greater than 0 create a priority level with 1 being the most important.
如果给定值为0，则该元素可以通过键盘进行集中，并落入文档的列表流中。大于0的值创建一个优先级，其中1是最重要的。

#6

I wanted to suggest something like Michael Shimmin's but without hardcoding things like the element, or the CSS that is applied to it.

我想推荐一些类似Michael Shimmin的东西，但是不需要硬编码，比如元素或者应用到它的CSS。

I'm only using jQuery for add/remove class, if you don't want to use jquery, you just need a replacement for add/removeClass

我只在add/remove类中使用jQuery，如果您不想使用jQuery，只需替换add/removeClass

--Javascript

——Javascript

function highlight(el, durationMs) { 
  el = $(el);
  el.addClass('highlighted');
  setTimeout(function() {
    el.removeClass('highlighted')
  }, durationMs || 1000);
}

highlight(document.getElementById('tries'));

--CSS

CSS——

#tries {
    border: 1px solid gray;
}

#tries.highlighted {
    border: 3px solid red;
}

#7

This will also scroll the browser to coresponding element with id

这也将滚动浏览器到带有id的coresponding元素。

var target = document.getElementById("target");
target.parentNode.scrollTop = target.offsetTop;

target.parentNode.scrollTop can be replaced with window.scrollTop if you want to scroll entire window

target.parentNode。可以用窗口替换滚动顶。如果您想要滚动整个窗口，则可以使用scrollTop。

#8

To make the border flash you can do this:

要制作边框动画，你可以这样做:

function focusTries() {
    document.getElementById('tries').style.border = 'solid 1px #ff0000;'
    setTimeout ( clearBorder(), 1000 );
}

function clearBorder() {
    document.getElementById('tries').style.border = '';
}

This will make the border solid red for 1 second then remove it again.

这将使边框在一秒内变为红色，然后再次删除它。

#1

window.location.hash = '#tries';