Trying some basic jQuery and JavaScript here.
The .width()
gives me an integer value. The .css('min-width')
gives me a value ending in px
. Therefore I can't do math on this as is. What is the recommended work around?
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').width());
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width'));
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').width() >= $('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width'));
if ($('#<%=lstProcessName.ClientID%>').parent('.column4').width() >= $('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width')) {
...
}
Use replace()
:
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width').replace('px', ''));
Alternatively, you could use the parseInt
function:
alert(parseInt('1px')); //Result: 1
The better way is to use parseInt
. jQuery functions .width()
and .height()
work quite so.
Also, it would be good to encapsulate fetching of this values in standalone functions:
.minHeight()
, .minHeight( size )
, .minHeight( function() )
.maxHeight()
, ...
.minWidth()
, ...
.maxWidth()
, ...
Like this:
(function($, undefined) {
var oldPlugins = {};
$.each([ "min", "max" ], function(_, name) {
$.each([ "Width", "Height" ], function(_, dimension) {
var type = name + dimension,
cssProperty = [name, dimension.toLowerCase()].join('-');
oldPlugins[ type ] = $.fn[ type ];
$.fn[ type ] = function(size) {
var elem = this[0];
if (!elem) {
return !size ? null : this;
}
if ($.isFunction(size)) {
return this.each(function(i) {
var $self = $(this);
$self[ type ](size.call(this, i, $self[ type ]()));
});
}
if (size === undefined) {
var orig = $.css(elem, cssProperty),
ret = parseFloat(orig);
return jQuery.isNaN(ret) ? orig : ret;
} else {
return this.css(cssProperty, typeof size === "string" ? size : size + "px");
}
};
});
});
})(jQuery);
And your code will turn to:
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').width());
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').minWidth());
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').width() >= $('#<%=lstProcessName.ClientID%>').parent('.column4').minWidth());
if ($('#<%=lstProcessName.ClientID%>').parent('.column4').width() >= $('#<%=lstProcessName.ClientID%>').parent('.column4').minWidth()) {
一些字符串操作删除'px'然后使用parseInt
将其作为数字:
var minWidth = parseInt($('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width').replace('px', ''), 10)
If you pass the return value from .css('min-width')
to parseInt
first, it will remove the "px" for you.
parseInt(
$('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width'),
10
);
(Don't forget the second parameter to parseInt
.)
alert($('#<%=lstProcessName.ClientID%>').parent('.column4').css('min-width').substring(0,indexOf('px'));
将子字符串用于从最小宽度返回的值以删除px
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