使用Javascript/jQuery打开Select?

New*_*bie 27 javascript jquery javascript-events

有没有办法使用Javascript(和jQuery)打开一个选择框?

<select style="width:150px;">
    <option value="1">1</option>
    <option value="2">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc arcu nunc, rhoncus ac dignissim at, rhoncus ac tellus.</option>
    <option value="3">3</option>
</select>
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我必须打开我的选择,因为bug.所有版本的IE(6,7,8)都削减了我的选择.据我所知,这没有css bugfix.目前我尝试执行以下操作:

var original_width = 0;
var selected_val = false;

if (jQuery.browser.msie) {
    $('select').click(function(){
        if (selected_val == false){
            if(original_width == 0)
                original_width = $(this).width();

            $(this).css({
                'position' : 'absolute',
                'width' : 'auto'
            });
        }else{
            $(this).css({
                'position' : 'relative',
                'width' : original_width
            });
            selected_val = false;
        }
    });

    $('select').blur(function(){
        $(this).css({
            'position' : 'relative',
            'width' : original_width
        });
    });

    $('select').blur(function(){
        $(this).css({
            'position' : 'relative',
            'width' : original_width
        });
    });

    $('select').change(function(){
        $(this).css({
            'position' : 'relative',
            'width' : original_width
        });
    });

    $('select option').click(function(){
        $(this).css({
            'position' : 'relative',
            'width' : original_width
        });

        selected_val = true;
    });

}
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但是第一次点击我的选择将改变选择的宽度,但我必须再次点击打开它.

ues*_*135 8

尝试这个:

var myDropDown=$("#myDropDown");
var length = $('#myDropDown> option').length;
//open dropdown
myDropDown.attr('size',length);
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并关闭:

//close dropdown
myDropDown.attr('size',0);
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小智 6

click您可以使用mousedown处理程序捕获mousedown事件,而不是使用. mousedown之前触发click,因此您可以调用stopPropogation以中断事件队列.


Mat*_*t H 6

我知道这已经很老了并且已经回答了,但这在Safari和iOS UIWebView中对我有用 - 我把它隐藏起来,但是想要在点击不同的按钮时显示和打开它.

$('#select-id').show().focus().click();
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New*_*bie 0

好吧,我找到了另一种方法来解决这个问题。这是修复方法:

请给我反馈!我为自己感到骄傲;)

$(document).ready(function() {
    if (jQuery.browser.msie) {
            select_init();
    }
});


function select_init () {
    var selects = $('select');
    for (var i = 0; i < selects.length; i++) {
        _resizeselect.init(selects[i]);
    }
}


var _resizeselect = {
    obj : new Array(),
    init : function (el) {
        this.obj[el] = new resizeselect (el);
    }
}

function resizeselect (el) {

    this.el = el;
    this.p = el.parentNode;
    this.ht = el.parentNode.offsetHeight;
    var obj = this;
    this.set = false;

    el.onmousedown = function () {
        obj.set_select("mousedown");
    }
    el.onblur = function () {
        obj.reset_select("blur");
    }
    el.onchange = function () {
        obj.reset_select("change");
    }

}

resizeselect.prototype.set_select = function (str) {

    if (this.set) {
        this.set = false;
        return;
    }

    this.el.style.width = "auto";
    this.el.style.position = "absolute";
    this.p.style.height = this.ht + "px";
    this.p.style.zIndex = 100;
    this.set = true;
    this.el.focus();
}

resizeselect.prototype.reset_select = function (str) {
    this.el.style.width = "";
    this.el.style.position = "";
    this.p.style.height = "";
    this.p.style.zIndex = 1;
    this.set = false;
    window.focus();
}
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