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How to get the value selected by the select tag in js

小云云
Release: 2018-03-13 18:00:13
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This article mainly shares with you how to get the value selected by the select tag in js. There are two ways to share with you. I hope it can help everyone.

var obj = document.getElementByIdx_x(”testSelect”); //定位id
var index = obj.selectedIndex; // 选中索引
var text = obj.options[index].text; // 选中文本
var value = obj.options[index].value; // 选中值
 
jQuery中获得选中select值
第一种方式$('#testSelect option:selected').text();//选中的文本
$('#testSelect option:selected') .val();//选中的值
$("#testSelect ").get(0).selectedIndex;//索引
 
第二种方式$("#tesetSelect").find("option:selected").text();
//选中的文本…….val();…….get(0).selectedIndex;
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如果select标签是有id属性的,如
<select id=xx>...
则用下述方法获取当前选项的值:
var v = xx.value;
或
var v = document.getElementById("xx").value;   //此方法兼容性好

如果select标签是有name属性的,如
<form name=form1>
<select name=xx>...
则用下述方法获取当前选项的值:
var v = form1.xx.value;
或
var v = document.getElementsByName("xx")[0].value;
如果同一页面含有多个name属性相同的标签,则上述[0]中的数字要改为相应的物理顺序号(从0起算)

如果select标签不含有任何可供定位的属性,如
<select>...
则用下述方法获取当前选项的值:
var v = document.getElementsByTagName("select")[0].value;
如果同一页面含有多个select标签,则上述[0]中的数字要改为相应的物理顺序号(从0起算)
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对于以下select标签,获取当前选择的值得方式如下:

<select id="test" name="">
<option value="1">text1</option>
<option value="2">text2</option>
</select>
code:
一:javascript原生的方法
1:拿到select对象: var myselect=document.getElementById("test");
2:拿到选中项的索引:var index=myselect.selectedIndex ; // selectedIndex代表的是你所选中项的index
3:拿到选中项options的value: myselect.options[index].value;
4:拿到选中项options的text: myselect.options[index].text;
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2: jquery method (provided that the jquery library has been loaded)

1:var options=$("#test option:selected");  //获取选中的项
2:alert(options.val());   //拿到选中项的值
3:alert(options.text());   //拿到选中项的文本
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js gets the select tag Two ways to select a value_javascript skills

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