一颗牛肉丸
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specific search word in select2

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specific search word after selector open

data source: ajax

  1. create a select2 selector and initial it
1
<select id="selector" isvalid="yes" autocomplete="off"></select>
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var globalKeyword = '';
$('#selector').select2({
    placeholder: 'please input keyword',
    //set this selector multiple, or we cant find that input element, dont know why
    multiple: true,
    maximumSelectionLength: 1,
    allowClear: true,
    ajax: {
        type: 'POST',
        url: 'your data source url',
        dataType: 'json',
        contentType : 'application/json',
        //load options page by page, you can ignore from here to line 43, just fill the selector with all options
        data: function(params){
            if(params.term == null){
                params.term = '';
            }
            //save keyword
            globalKeyword = params.term;
            //search by multi keyword
            var keyword = params.term.split(/\s+/);
            var param = {
                name: keyword,
                pageNumber: params.page || 1,
                pageSize: 10,
                sortOrder: "asc",
            };
            return JSON.stringify(param);
        },
        processResults: function(r, params) {
            params.page = params.page || 1;
            var itemList = [];
            $.each(r.rows, function(idx, item) {
                itemList.push({id: item.id, text: item.name});
            });
            return {
                results: itemList,
                pagination: {
                    more: r.pageNo<r.totalPages
                }
            }
        },
        cache: true,
    },
    minimumInputLength: 0
});

//clear selected option
$('#selector').val('').trigger('change');
//save keyword here or it will be clear after selector open again
var keyword = globalKeyword;
//dropdown selector
$('#selector').select2('open');
//set keyword
$('.select2-search__field').val(keyword);