先看 一段选中所有页面check类型的代码
$(
"
#SelectBtn
"
).click(
function
(){
var state = $( " #SelectAll " ).attr( " checked " );
if (state != true ){
selectAll()
$( " #SelectAll " ).attr( " checked " , " true " );
}
else {
cancelAll()
$( " #SelectAll " ).attr( " checked " , " false " );
}
});
var state = $( " #SelectAll " ).attr( " checked " );
if (state != true ){
selectAll()
$( " #SelectAll " ).attr( " checked " , " true " );
}
else {
cancelAll()
$( " #SelectAll " ).attr( " checked " , " false " );
}
});
逻辑上正确，问题在这一句
$("#SelectAll").attr("checked","false");
咋一看是想取消选中，其实不然。“checked是一个单属性”，无论它是true还是false，它总是checked而非unchecked。
所以上边的一句应该改成
$("#SelectAll").removeAttr("checked")
<input type="checkbox" checked=“false ”/>虽然false，但这一项仍被选中
