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Gets and sets the value of the selected item of select

Source: Internet
Author: User
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<! DOCTYPE html>

<meta charset= "UTF-8" >

<title> gets the value of the selected item for select </title>

<body>

<select id= "Select0" >

<option value= "0" > Please select options </option>

<option value= "1" > Option one </option>

<option value= "2" > Options two </option>

<option value= "3" > option three </option>

<option value= "4" > Options four </option>

<option value= "5" > Options five </option>

</select>

</body>

<script src= "Jquery-2.1.1.min.js" ></script>

<script>

Window.onload=function () {

var tags=document.getelementsbytagname ("select");

Use JavaScript to get the Select ""

var S=document.getelementbyid ("Select0");

s.selectedindex=2;//to set the index of the selected item

var index= s.selectedindex;//Gets the index of the selected item

Console.log (S.options[index].value);//Output The value of the selected item: value=3

Console.log (S.options[index].text);//Output The value of the selected item in option: Options three

You can also get the following values by using the following method

var Selectedvalue=document.getelementbyid ("Select0"). Value;

Console.log (SelectedValue);


Using the JQuery method to set and get

Console.log ($ ("#select0"). Find ("option:selected"). Text ());//Gets the text inside of the selected option

Console.log ($ ("#select0"). Val ());//Gets the selected value

$ ("#select0"). Val (1);//Set the selected value

Console.log ($ ("#select0"). Val ());


Combination of jquery and JavaScript

var sindex=$ ("#select0"). Get (0). SelectedIndex;

Select the item according to text= ' option four '

$ ("#select0 option[text= ' option One ']"). attr ("Selected", "true");


$ ("#select0 option[value= ' 2 ']"). Remove ();//delete value= ' 2 ' option to delete

Remove all other items except the first item

$ ("#select0 option[value!= ' 0 ']"). Remove ();//can be used to correlate multiple selection boxes, and then clear another option box when one of the options boxes starts to be selected.

};

</script>


This article is from the "Leefeng" blog, make sure to keep this source http://10173384.blog.51cto.com/10163384/1735070

Gets and sets the value of the selected item of select

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