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characters

返回值:String,Arrayval([val|fn|arr])

概述

獲得匹配元素的當前值。

在 jQuery 1.2 中,可以返回任意元素的值了。包括select。如果多選,將返回一個數(shù)組,其包含所選的值。

參數(shù)

valStringV1.0

要設(shè)置的值。

function(index, value)FunctionV1.4

此函數(shù)返回一個要設(shè)置的值。接受兩個參數(shù),index為元素在集合中的索引位置,text為原先的text值。

arrayArray<String>V1.0

用于 check/select 的值

示例

無參數(shù) 描述:

獲取文本框中的值

jQuery 代碼:
$("input").val();

參數(shù)val 描述:

設(shè)定文本框的值

jQuery 代碼:
$("input").val("hello world!");

回調(diào)函數(shù) 描述:

設(shè)定文本框的值

jQuery 代碼:
$('input:text.items').val(function() {
  return this.value + ' ' + this.className;
});

參數(shù)array 描述:

設(shè)定一個select和一個多選的select的值

HTML 代碼:
<select id="single">
  <option>Single</option>
  <option>Single2</option>
</select>
<select id="multiple" multiple="multiple">
  <option selected="selected">Multiple</option>
  <option>Multiple2</option>
  <option selected="selected">Multiple3</option>
</select><br/>
<input type="checkbox" value="check1"/> check1
<input type="checkbox" value="check2"/> check2
<input type="radio" value="radio1"/> radio1
<input type="radio" value="radio2"/> radio2
jQuery 代碼:
$("#single").val("Single2");
$("#multiple").val(["Multiple2", "Multiple3"]);
$("input").val(["check2", "radio1"]);
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