将像素添加到 jquery .css() left 属性
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adding pixels to jquery .css() left property
提问by Hormigas
This is my code:
这是我的代码:
var lef=$(this).css("left");
var top=$(this).css("top");
alert(lef);
$(this).after("<div class='edit cancel' style='position:absolute;top:"+top+";left:"+lef+"'>Cancel</div>");
Now the statement var lef=$(this).css("left") + 150, doesn't seem to work. I want to get the left property and add 150 pixels to it
现在声明var lef=$(this).css("left") + 150, 似乎不起作用。我想获得 left 属性并为其添加 150 像素
How can i do this ?
我怎样才能做到这一点 ?
Thanks.
谢谢。
回答by mayatron
As of jQuery 1.6, you can do this most easily by simply adding or subtracting from the current value. For example, to add 150px:
从 jQuery 1.6 开始,您可以通过简单地添加或减去当前值来最轻松地完成此操作。例如,要添加 150px:
$(this).css("left", "+=150")
$(this).css("left", "+=150")
http://api.jquery.com/css/#css-properties
http://api.jquery.com/css/#css-properties
As of jQuery 1.6, .css() accepts relative values similar to .animate(). Relative values are a string starting with += or -= to increment or decrement the current value. For example, if an element's padding-left was 10px, .css( "padding-left", "+=15" ) would result in a total padding-left of 25px.
从 jQuery 1.6 开始,.css() 接受类似于 .animate() 的相对值。相对值是一个以 += 或 -= 开头的字符串,用于增加或减少当前值。例如,如果元素的 padding-left 为 10px,.css("padding-left", "+=15") 将导致总 padding-left 为 25px。
回答by thirtydot
Here's the easiest way (for the general case):
这是最简单的方法(对于一般情况):
$(this).css('left', '+=150');
$(this).css('top', '-=100');
http://api.jquery.com/css/#css-properties
http://api.jquery.com/css/#css-properties
As of jQuery 1.6,
.css()accepts relative values similar to.animate(). Relative values are a string starting with+=or-=to increment or decrement the current value. For example, if an element's padding-left was 10px,.css( "padding-left", "+=15" )would result in a total padding-left of 25px.
从 jQuery 1.6 开始,
.css()接受类似于.animate(). 相对值是以+=或开头的字符串,-=用于增加或减少当前值。例如,如果元素的 padding-left 为 10px,则.css( "padding-left", "+=15" )总 padding-left 为 25px。
If you need to do it "manually" (for example, as part of creating a new element):
如果您需要“手动”执行此操作(例如,作为创建新元素的一部分):
var left = parseInt($(this).css('left')) + 150;
var top = parseInt($(this).css('top'));
$(this).after('<div style="top: ' + top + 'px; left: ' + left + 'px; position: absolute">Cancel</div>');
You need to use parseIntbecause .css('left')returns 150px. You then have to put back the pxas part of the inline style.
您需要使用parseInt因为.css('left')返回150px。然后,您必须将px作为内联样式的一部分放回原处。
回答by optimista
I've simplified thirtydot answer. You can use this jQuery function for any property you want to add pixels.
我已经简化了三十多点的答案。您可以将此 jQuery 函数用于要添加像素的任何属性。
jQuery.fn.addPixelsTo = function(property, pxls) {
return $(this[0]).css(property, (parseInt($(this[0]).css(property).substr(0,2))+pxls)+'px');
}
Example:
例子:
$('#element').addPixelsTo('border-top-width', 30);
回答by san
try this
尝试这个
var WinW=jQuery(window).width();
var lft =parseInt(WinW/2);
jQuery(".div").css("left" , (lft));
it will put the div in center of a page, then it will work fine....
它会将 div 放在页面的中心,然后它会正常工作....
回答by Varun
can try
可以尝试
$(this).css("left", function(){
return ($(this).css("left")+150);
});
for any complex modification as well
也适用于任何复杂的修改
回答by MD Sayem Ahmed
var lef=$(this).css("left")
var lef=$(this).css("left")
This line is returning a string, with which you are concatenating 150by the +operator. You need to convert the $(this).css("left")string to number first.
此行返回一个字符串,您正在150由+运算符连接该字符串。您需要$(this).css("left")先将字符串转换为数字。
A jsfiddledemo to prove my point.
一个jsfiddle演示来证明我的观点。
So, you can do this in the following way -
因此,您可以通过以下方式执行此操作 -
var lef = partInt($(this).css("left")) + 150;
var lef = partInt($(this).css("left")) + 150;
Now you will get addition instead of string concatenation.
现在您将获得加法而不是字符串连接。

