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HomeWeb Front-endJS Tutorialjquery learning 2 attributes text and value (text,val)_jquery

text()

取得所有匹配元素的内容。
结果是由所有匹配元素包含的文本内容组合起来的文本。这个方法对HTML和XML文档都有效。

返回值

String

示例

HTML 代码:

Test Paragraph.

Paraparagraph

jQuery 代码:

$("p").text();

结果:

Test Paragraph.Paraparagraph
------------------------------------------------------------------------------------------------------------------------------

text(val)

设置所有匹配元素的文本内容
与 html() 类似, 但将编码 HTML (将 "" 替换成相应的HTML实体).

返回值

jQuery

参数

val (String) : 用于设置元素内容的文本

示例

HTML 代码:

Test Paragraph.

jQuery 代码:

$("p").text("Some new text.");

结果:

[

Some new text.

]
------------------------------------------------------------------------------------------------------------------------------

val()

获得第一个匹配元素的当前值。
在 jQuery 1.2 中,可以返回任意元素的值了。包括select。如果多选,将返回一个数组,其包含所选的值。

返回值

String,Array

示例

获得单个select的值和多选select的值。

HTML 代码:




jQuery 代码:

$("p").append(
  "Single: "   + $("#single").val() +
  " Multiple: " + $("#multiple").val().join(", ")
);

结果:

[

Single:SingleMultiple:Multiple, Multiple3

]

获取文本框中的值

HTML 代码:

jQuery 代码:

$("input").val();

结果:

some text
------------------------------------------------------------------------------------------------------------------------------

val(val)

设置每一个匹配元素的值。
在 jQuery 1.2, 这也可以为select元件赋值

Return value

jQuery

Parameters

val (String): The value to be set.

Example

Set the value of the text box

HTML code:

jQuery code:

$("input").val("hello world!");
-------------------------------------------------- -------------------------------------------------- --------------------------

val(val)

check, select, radio, etc. can be used to assign values ​​

Return value

jQuery

Parameters

val (Array) : value used for check/select

Example

Set the value of a select and a multi-select select

HTML code:








check1
check2
radio1
radio2

jQuery code:

$("#single").val("Single2");
$("#multiple").val(["Multiple2", "Multiple3"]);
$("input" ).val(["check2", "radio1"]);
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