jQuery slide方法的原理

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下面先贴一段源码
function genFx( type, includeWidth ) {var which,attrs = { height: type },i = 0;// if we include width, step value is 1 to do all cssExpand values,// if we don't include width, step value is 2 to skip over Left and RightincludeWidth = includeWidth ? 1 : 0;for ( ; i < 4 ; i += 2 - includeWidth ) {which = cssExpand[ i ];attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;}if ( includeWidth ) {attrs.opacity = attrs.width = type;}return attrs;}

上面的代码为jQuery源码,但是看不懂。之后我在执行slide方法时输出操作元素的各个属性

alert($("#1").next().css('display'));$("#1").nextUntil('#2').slideToggle(1);

输出的各个值:visibility:visible;height:24px;这两者无论隐藏还是显示都不改变。

display在隐藏时为none           显示时为table-row(我隐藏的是表格)

所以小伙伴们,以后在使用slide方法可以用判断display的值来确定元素是隐藏状态还是显示状态

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