Detailed explanation of jQuery Chosen universal initialization-JS Tutorial-php.cn

Detailed explanation of jQuery Chosen universal initialization

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Release： 2018-01-23 11:21:03

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This article mainly introduces the jQuery Chosen universal initialization. It is very good and has reference value. Friends in need can refer to it. I hope it can help everyone.

I have been using the Chosen js plug-in, whose purpose is to beautify the drop-down box. github address: https://harvesthq.github.io/chosen/

no_results_text: The text displayed when "xxxxx" has no search results

allow_single_deselect: true whether to allow deselection
disable_search : true Whether a search box appears

max_selected_options: When the select is multiple selection, the maximum number of choices

Official documentation address

Official documentation address for configuration options

/* 功能: Chosen通用初始化
 * 创建人：Brian 创建时间：2016-12-13
 */
(function ($j) {
  var chosenTool = function (el, options) {
    this.opts = options;
    this.chosenInit();
    this.chose_get_init();
    this.chose_mult_set_init(this.opts.hidClassName);
    this.clickEvent();
    return this;
  }
  chosenTool.opts = {
    selectId: &#39;&#39;,//selectId
    hidClassName: &#39;&#39;,//隐藏域Class
    placeholdertxt: &#39;&#39;,//select中placeholder文字
    noresulttxt: &#39;&#39;,//输入的名称未查到时显示的文字
    dataJson: &#39;&#39;//数据源
  };
  $j.fn.myChosenTool = function (opt) {
    var value,
      args = Array.prototype.slice.call(arguments, 1);
    var $jthis = $j(this),
      data = $jthis.data(&#39;chosenTool&#39;),
      options = $j.extend({}, chosenTool.opts, $jthis.data(),
        typeof option === &#39;object&#39; && option);
    if (typeof option === &#39;string&#39;) {
      //判断用户调用的方法是否存在
      //if ($j.inArray(option, allowedMethods) < 0) {
      //  throw new Error("Unknown method: " + option);
      //}
      if (!data) {
        return;
      }
      value = data[option].apply(data, args);
      if (option === &#39;destroy&#39;) {
        $jthis.removeData(&#39;chosenTool&#39;);
      }
    }
    /*插件外部调用插件内部的方法需要修改成下面形式*/
    //if (typeof opt === &#39;string&#39;) {
    //  if (!data) {
    //    return;
    //  }
    //  value = data[opt].apply(data, args);
    //  if (opt === &#39;destroy&#39;) {
    //    $jthis.removeData(&#39;chosenTool&#39;);
    //  }
    //}
    if (!data) {
      opt["selectId"] = $j(this).attr("id");
      $jthis.data(&#39;chosenTool&#39;, (data = new chosenTool(this, opt)));
    }
    console.log(data);
    return typeof value === &#39;undefined&#39; ? this : value;
  };
  chosenTool.prototype.clickEvent = function () {
    var _this = this;
    $j("#" + this.opts.selectId).on("change", function () {
      _this.chose_get_value();
    });
  };
  /*下拉框初始化方法*/
  chosenTool.prototype.selectInfoInit = function () {
    var proOPts = "";
    this.opts.dataJson = $j.parseJSON(this.opts.dataJson);
    $j.each(this.opts.dataJson, function (index, item) {
      proOPts += "<option value=&#39;" + item.ValueField + "&#39;>" + item.TextField + "</option>";
    });
    $j("#" + this.opts.selectId).append(proOPts);
    //初始化chosen
    $j("#" + this.opts.selectId).chosen({
      allow_single_deselect: true, //是否允许取消选择
      placeholder_text_multiple: this.opts.placeholdertxt, //多选框没有选中任何值的时候 显示的文字
      no_results_text: this.opts.noresulttxt,//无搜索结果时显示的文本
      search_contains: true//是否支持模糊搜索
    });
  };
  /*对象初始化方法*/
  chosenTool.prototype.chosenInit = function () {
    this.selectInfoInit();
  };
  //私有方法，检测参数是否合法
  chosenTool.prototype.isValid = function () {
    return !this.options || (this.options && typeof this.options === "object") ? true : false;
  };
  //数据同步
  chosenTool.prototype.chose_get_init = function () {
    var selectId = this.opts.selectId;
    $j("#" + this.opts.selectId).chosen().change(
         function () {
           $j("#" + selectId).trigger("liszt:updated");//更新下拉框
         });
  };
  //单选select value获取
  chosenTool.prototype.chose_get_value = function () {
    var selectVal = $j("#" + this.opts.selectId).val();
    $j("." + this.opts.hidClassName).val(selectVal);
  };
  //单选select value获取
  chosenTool.prototype.chose_mult_set_init = function () {
    var values = $j("." + this.opts.hidClassName).val();
    if (values && values.indexOf(&#39;,&#39;) > 0) {
      var arr = values.split(&#39;,&#39;);
      var length = arr.length;
      var value = &#39;&#39;;
      for (i = 0; i < length; i++) {
        value = arr[i];
        $j("#" + this.opts.selectId + " [value=&#39;" + value + "&#39;]").attr(&#39;selected&#39;, &#39;selected&#39;);
      }
    } else {
      $j("#" + this.opts.selectId + " [value=&#39;" + values + "&#39;]").attr(&#39;selected&#39;, &#39;selected&#39;);
    }
    $j("#" + this.opts.selectId).trigger("liszt:updated");
  };
  //select text获取，多选时请注意
  chosenTool.prototype.chose_get_text = function () {
    return $j("#" + this.opts.selectId + " option:selected").text();
  };
})(jQuery);

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