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jQuery implements the case-insensitive method of contains method_jquery

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Release: 2016-05-16 16:14:07
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The example in this article describes how jQuery implements the contains method to be case-insensitive. Share it with everyone for your reference. The specific implementation method is as follows:

// NEW selector  
jQuery.expr[':'].Contains = function(a, i, m){
 return jQuery(a).text().toUpperCase()
   .indexOf(m[3].toUpperCase()) >= 0;
};  
 
// OVERWRITES old selecor
jQuery.expr[':'].contains = function(a, i, m){
 return jQuery(a).text().toUpperCase()
   .indexOf(m[3].toUpperCase()) >= 0;
};
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Usage:

$("div:contains('John')")
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Test HTML file:

<div>john</div>
<div>John</div>
<div>hey hey JOHN hey hey</div>
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I hope this article will be helpful to everyone’s jQuery programming.

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