jQuery 中的字符串操作
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String manipulation in jQuery
提问by juan
I have a div which collapses clicking on a text header. I want to change the header from "+ filters" to "- filters" accordingly (when the div is collapsed or expanded)
我有一个 div 折叠点击文本标题。我想相应地将标题从“+过滤器”更改为“-过滤器”（当div折叠或展开时）
How can I perform this with jQuery?
如何使用 jQuery 执行此操作？
if (headerDiv.text() starts with "+")
replace "+" with "-"
else
replace "-" with "+"
回答by juan
Never mind, I figured it out
没关系，我想通了
if ($(header).text().trim().charAt(0) == "+")
$(header).text($(header).text().replace("+", "-"));
else
$(header).text($(header).text().replace("-", "+"));
If this is not the correct way, I'd appreciate a heads up
如果这不是正确的方法，我将不胜感激
回答by fmsf
I would do:
我会做：
var plus_string = "<span class=/"plus/">+</span>";
var minus_string = "<span class=/"minus/">-</span>";
if($("div.header").hasClass("plus")){
$("div.header").removeClass("plus");
$("div.header").addClass("minus");
$("div.header").append(plus_string);
$("span.plus").remove();
} else (... the reverse of the above...)
This because i would use the class plus and minus to handle a bit of css to change the appearance of the header div. As you're probably already doing that, you can play a bit with it like this :)
这是因为我会使用类加号和减号来处理一些 css 来改变标题 div 的外观。因为您可能已经这样做了，所以您可以像这样玩一下:)
回答by Andrew Clark
keep it simple, why do you need to parse it out? your just replacing one string with another.
保持简单，你为什么需要解析它？你只是用另一个替换一个字符串。
if(headerDiv.text() == '+ filters')
{
headerDiv.text() == '- filters';
}
elseif(headerDiv.text() == '- filters')
{
headerDiv.text() == '+ filters';
}
