[英]How to reset background colour after it is changed by jQuery?
First, a jsfiddle... http://jsfiddle.net/therocketforever/jYba3/11/ 首先,一个jsfiddle ... http://jsfiddle.net/therocketforever/jYba3/11/
// Highlight selected linker link & set all others to default.
$('a.linker').click(function(){
$(this).addClass('selected');
$(this).parent('li').siblings().find('.selected').removeClass('selected');
// Selects a random colour from the 'colors' array by getting a random value
// between 0 and the length of the color array.
rand = Math.floor(Math.random()*colors.length);
$(this).css("background-color", colors[rand]);
Now a Question, 现在是一个问题
Firstly this code works almost exactly the way that I would like it to, A user clicks a link, the selected colour is applied to the link text, removed from the others & the background of the link is set to a random color from the array of colours. 首先,此代码几乎完全按照我想要的方式工作,用户单击链接,将所选颜色应用于链接文本,从其他文本中删除,并将链接的背景设置为数组中的随机颜色颜色。 Cool.
凉。
What I would like to know is... How would I make it so that the randomly set background colour is removed from the non selected links (ie. Only the link with the .selected class has the background colour.) 我想知道的是...我将如何做,以便从未选中的链接中删除随机设置的背景色(即,只有具有.selected类的链接才具有背景色。)
EXTRA CREDIT 额外信用
Bonas points if the same background colour is never used twice in a row. Bonas指出是否从未连续两次使用相同的背景色。 (ie. If click one sets to yellow, click two is any other colour except yellow.
(即,如果单击一个设置为黄色,则单击两个是除黄色以外的任何其他颜色。
This'll meet all your requirements (bonus included). 这将满足您的所有要求(包括奖金)。
$(document).ready(function(){
// Colours for links
var colors = ["#fff766","#66cef5","#bd7ebc","#66cc66"];
$("a.linker").click(function(){
var $this = $(this).addClass("selected");
$this.parent('li').siblings().find('.selected')
.removeClass('selected').css("background-color", "");
var num = $this.data("colorNum"),
rand = num;
while (num === rand) {
rand = Math.floor(Math.random()*colors.length);
}
$this.css("background-color", colors[rand])
.data("colorNum", rand);
});
});
只需这样写:
$(this).css({'background-color':''});
Just use jQuery's .css()
method to remove the background color: 只需使用jQuery的
.css()
方法即可删除背景色:
$(this).addClass('selected')
.parent('li').siblings().find('.selected')
.removeClass('selected').css('background-color', '');
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