Скачать или смотреть jQuery case insensitive attribute selector

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In this video we will discuss, how to write a jQuery case-insensitive attribute value selector. Let us understand this with an example.

The following example, only selects DIV 1. This is because jQuery attribute value selector is case-sensitive.
[html]
[head]
[title][/title]
[script src="Scripts/jquery-1.11.2.js"][/script]
[script type="text/javascript"]
$(document).ready(function () {
$('div[title="DivTitle"]').css('border', '3px solid red');
});
[/script]
[/head]
[body]
[div title="DivTitle"]
DIV 1
[/div]
[br /]
[div title="DIVTITLE"]
DIV 2
[/div]
[br /]
[div title="divtitle"]
DIV 3
[/div]
[/body]
[/html]

Use the following code to make the jQuery attribute value selector case-insensitive
[script type="text/javascript"]
$(document).ready(function () {
$('div[title]').filter(function () {
return $(this).attr('title').toLowerCase() == 'divtitle';
}).css('border', '3px solid red');
});
[/script]

The above script should select all the 3 divs.

Now let us look at an example of making attribute contains selector [name*="value"], case-insensitive.

The following example, selects only DIV 1 element. This is because the attribute contains selector is case-sensitive.
[html]
[head]
[title][/title]
[script src="Scripts/jquery-1.11.2.js"][/script]
[script type="text/javascript"]
$(document).ready(function () {
$('div[title*="Div"]').css('border', '3px solid red');
});
[/script]
[/head]
[body]
[div title="DivTitle1"]
DIV 1
[/div]
[br /]
[div title="DIVTITLE2"]
DIV 2
[/div]
[br /]
[div title="divtitle3"]
DIV 3
[/div]
[/body]
[/html]

To make attribute contains selector case-insensitive, use filter() method and regular expression as shown below.
[script type="text/javascript"]
$(document).ready(function () {
$('div[title]').filter(function () {
return (/Div/i).test($(this).attr('title'));
}).css('border', '3px solid red');
});
[/script]

OR

[script type="text/javascript"]
$(document).ready(function () {
$('div[title]').filter(function () {
return RegExp('Div','i').test($(this).attr('title'));
}).css('border', '3px solid red');
});
[/script]

The above script should select all the 3 divs.

Visual Studio Keyboard Shortcuts
Convert Selected Text to Upper Case - CTRL + SHIFT + U
Convert Selected Text to Lower Case - CTRL + U