jQuery Select2-如何选择所有选项

问题描述

我正在使用jQuery select2 multi select下拉列表.我需要从代码的下拉列表中选择所有选项.基本上有一个全选"复选框必须在其上实现此功能，我想从此复选框中选择/取消选择选项.

I'm using jQuery select2 multi select dropdown. I need to select all options in a dropdown from code.Basically there is a Select All checkbox on which this functionality has to be implemented, I want to select/deselect options from this checkbox.

推荐答案

在github上的线程中有描述.引用( https://github.com/ivaynberg/select2/issues/195#issuecomment -13489140 由 MortadaAK )创建，它使您可以选择ctrl + a上的所有内容

There is a description in thread on github. Quoting (https://github.com/ivaynberg/select2/issues/195#issuecomment-13489140 by MortadaAK) which allows you to select everything on ctrl+a

$(document).on("keypress",".select2-input",function(event){
    if (event.ctrlKey || event.metaKey) {
        var id =$(this).parents("div[class*='select2-container']").attr("id").replace("s2id_","");
        var element =$("#"+id);
        if (event.which == 97){
            var selected = [];
            element.find("option").each(function(i,e){
                selected[selected.length]=$(e).attr("value");
            });
            element.select2("val", selected);
        } else if (event.which == 100){
            element.select2("val", "");
        }
    }
});

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