javascript compare strings without being case sensitive

Question

I have to check some strings using JavaScript but case sensitivity is causing problems   for example   if  abc    ABC     return true      it will not go inside the if loop though the meaning of the word are same  I cant use tolower clause too since i dont know the data how it would come it means  for ex   if  aBc    abC     return true      how to write the JS function for this if it could be done by jquery

User · Accepted Answer

You can make both arguments lower case  and that way you will always end up with a case insensitive search   var string1    aBc   var string2    AbC    if  string1 toLowerCase       string2 toLowerCase           stuff

User · Answer

Try this     if string1 toLowerCase      string2 toLowerCase         return true      Also  it s not a loop  it s a block of code  Loops are generally repeated  although they can possibly execute only once   whereas a block of code never repeats   I read your note about not using toLowerCase  but can t see why it would be a problem

User · Answer

You can also use string match     var string1    aBc   var match   string1 match  AbC i    if match

User · Answer

Another method using a regular expression  this is more correct than Zachary s answer    var string1    someText       string2    SometexT       regex   new RegExp       string1         i     if  regex test string2         return true      RegExp test   will return true or false    Also  adding the      signifying the start of the string  to the beginning and      signifying the end of the string  to the end make sure that your regular expression will match only if  sometext  is the only text in stringToTest  If you re looking for text that contains the regular expression  it s ok to leave those off   It might just be easier to use the string toLowerCase   method    So    regular expressions are powerful  but you should only use them if you understand how they work  Unexpected things can happen when you use something you don t understand   There are tons of regular expression  tutorials   but most appear to be trying to push a certain product  Here s what looks like a decent tutorial    granted  it s written for using php  but otherwise  it appears to be a nice beginner s tutorial  http   weblogtoolscollection com regex regex php  This appears to be a good tool to test regular expressions  http   gskinner com RegExr

[javascript] javascript compare strings without being case sensitive

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