How use contains in jQuery?

jQuery :contains() Selector The :contains() selector selects elements containing the specified string . The string can be contained directly in the element as text, or in a child element. This is mostly used together with another selector to select the elements containing the text in a group (like in the example above).

Comparing strings in a case insensitive manner means to compare them without taking care of the uppercase and lowercase letters . To perform this operation the most preferred method is to use either toUpperCase() or toLowerCase() function.

Answer 51d3cd1b8c1cccce5c004d94 Yes, it is . More generally, JavaScript is case-sensitive: tolowercase() won’t work, it must be toLowerCase() .