我有一个链接按钮内<td>,我必须禁用。这适用于IE,但不适用于Firefox和Chrome。
我尝试了以下所有方法,但在Firefox(使用1.4.2 js)上都无法工作:
$(".myLink").attr('disabled', 'disabled');
$(".myLink").attr('disabled', true);
$(".myLink").attr('disabled', 'true');
注意-我不能注销锚标记的点击功能,因为它是动态注册的。我必须在禁用模式下显示链接。
感谢每个发布解决方案的人(特别是@AdrianoRepetti),我结合了多种方法来提供一些更高级的禁用功能(它可以跨浏览器工作)。代码如下(ES2015和coffeescript根据您的喜好)。
这提供了多个级别的防御,因此标记为禁用的锚实际上是这样的行为。
使用这种方法,你可以得到一个锚,你不能:
点击
按TAB键返回
标签将焦点移动到下一个可聚焦的元素
它知道锚是否随后被启用
如何
包括这个css,因为它是第一道防线。这假设你使用的选择器是a.disabled
a.disabled {
pointer-events:没有;
光标:违约;
}
接下来,在ready上实例化这个类(使用可选的选择器):
新的AnchorDisabler ()
ES2015类
安装-S key.js
import {Key, Keycodes} from 'key.js'
export default class AnchorDisabler {
constructor (config = { selector: 'a.disabled' }) {
this.config = config
$(this.config.selector)
.click((ev) => this.onClick(ev))
.keyup((ev) => this.onKeyup(ev))
.focus((ev) => this.onFocus(ev))
}
isStillDisabled (ev) {
// since disabled can be a class or an attribute, and it can be dynamically removed, always recheck on a watched event
let target = $(ev.target)
if (target.hasClass('disabled') || target.prop('disabled') == 'disabled') {
return true
}
else {
return false
}
}
onFocus (ev) {
// if an attempt is made to focus on a disabled element, just move it along to the next focusable one.
if (!this.isStillDisabled(ev)) {
return
}
let focusables = $(':focusable')
if (!focusables) {
return
}
let current = focusables.index(ev.target)
let next = null
if (focusables.eq(current + 1).length) {
next = focusables.eq(current + 1)
} else {
next = focusables.eq(0)
}
if (next) {
next.focus()
}
}
onClick (ev) {
// disabled could be dynamically removed
if (!this.isStillDisabled(ev)) {
return
}
ev.preventDefault()
return false
}
onKeyup (ev) {
// We are only interested in disabling Enter so get out fast
if (Key.isNot(ev, Keycodes.ENTER)) {
return
}
// disabled could be dynamically removed
if (!this.isStillDisabled(ev)) {
return
}
ev.preventDefault()
return false
}
}
咖啡类:
class AnchorDisabler
constructor: (selector = 'a.disabled') ->
$(selector).click(@onClick).keyup(@onKeyup).focus(@onFocus)
isStillDisabled: (ev) =>
### since disabled can be a class or an attribute, and it can be dynamically removed, always recheck on a watched event ###
target = $(ev.target)
return true if target.hasClass('disabled')
return true if target.attr('disabled') is 'disabled'
return false
onFocus: (ev) =>
### if an attempt is made to focus on a disabled element, just move it along to the next focusable one. ###
return unless @isStillDisabled(ev)
focusables = $(':focusable')
return unless focusables
current = focusables.index(ev.target)
next = (if focusables.eq(current + 1).length then focusables.eq(current + 1) else focusables.eq(0))
next.focus() if next
onClick: (ev) =>
# disabled could be dynamically removed
return unless @isStillDisabled(ev)
ev.preventDefault()
return false
onKeyup: (ev) =>
# 13 is the js key code for Enter, we are only interested in disabling that so get out fast
code = ev.keyCode or ev.which
return unless code is 13
# disabled could be dynamically removed
return unless @isStillDisabled(ev)
ev.preventDefault()
return false
还有另一种可能的办法,也是我最喜欢的办法。基本上,这与lightbox禁用整个页面的方式是一样的,通过放置一个div和摆弄z-index。以下是我的一个项目的相关片段。这适用于所有浏览器!!!!!
Javascript (jQuery):
var windowResizer = function(){
var offset = $('#back').offset();
var buttontop = offset.top;
var buttonleft = offset.left;
$('#backdisabler').css({'top':buttontop,'left':buttonleft,'visibility':'visible'});
offset = $('#next').offset();
buttontop = offset.top;
buttonleft = offset.left;
$('#nextdisabler').css({'top':buttontop,'left':buttonleft,'visibility':'visible'});
}
$(document).ready(function() {
$(window).resize(function() {
setTimeout(function() {
windowResizer();
}, 5); //when the maximize/restore buttons are pressed, we have to wait or it will fire to fast
});
});
在HTML中
<a href="" id="back" style="float: left"><img src="images/icons/back.png" style="height: 50px; width: 50px" /></a>
<a href="" id="next" style="float: right"><img src="images/icons/next.png" style="height: 50px; width: 50px" /></a>
<img id="backdisabler" src="images/icons/disabled.png" style="visibility: hidden; position: absolute; padding: 5px; height: 62px; width: 62px; z-index: 9000"/>
<img id="nextdisabler" src="images/icons/disabled.png" style="visibility: hidden; position: absolute; padding: 5px; height: 62px; width: 62px; z-index: 9000"/>
因此,调整器找到锚的位置(图像只是箭头),并将禁用器放在顶部。禁用器的图像是一个半透明的灰色正方形(改变html中禁用器的宽度/高度以匹配您的链接),以显示它是禁用的。浮动允许页面动态地调整大小,并且在windowResizer()中禁用程序也会这样做。你可以通过谷歌找到合适的图片。为了简单起见,我将相关的css内联放置。
然后基于某些条件,
$('#backdisabler').css({'visibility':'hidden'});
$('#nextdisabler').css({'visibility':'visible'});
Bootstrap 4.1提供了一个名为disabled的类和aria-disabled="true"属性。
例子”
<a href="#"
class="btn btn-primary btn-lg disabled"
tabindex="-1"
role="button" aria-disabled="true"
>
Primary link
</a>
更多内容请访问getbootstrap.com
如果你想动态地创建它,你不想关心它是button还是ancor than
在JS脚本中你需要这样的东西
let $btn=$('.myClass');
$btn.attr('disabled', true);
if ($btn[0].tagName == 'A'){
$btn.off();
$btn.addClass('disabled');
$btn.attr('aria-disabled', true);
}
但是要小心
该解决方案仅适用于具有btn btn-link类的链接。
有时bootstrap建议使用card-link类,在这种情况下解决方案将不起作用。