Sep 19, 2010 · As hinted at in yatima2975's answer, there is an additional difference: substr() accepts a negative starting position as an offset from the end of the string. substring() does not, but slice() …

You're confusing substring() and substr(): substring() expects two indices and not offset and length. In your case, the indices are 5 and 2, ie characters 2..4 will be returned as the higher index is excluded.

Feb 11, 2010 · Distinctions of substring(): If start > stop, then substring will swap those 2 arguments. If either argument is negative or is NaN, it is treated as if it were 0. Distinctions of slice(): If start > stop, …

9 This may be new, but the substring method returns everything from a specified index to the end of the string.

How to grab substring before a specified character in JavaScript? Asked 13 years, 10 months ago Modified 1 year ago Viewed 725k times

Nov 27, 2016 · How to replace substring in Javascript? Asked 15 years ago Modified 4 years, 11 months ago Viewed 50k times

A diferença é que o substr trabalha com quantidades de caracteres (especificada ou não no segundo parâmetro) a partir de uma posição index (índice) da string (especificada no primeiro parâmetro), …

Apr 7, 2011 · Pretty straight forward. In javascript, I need to check if a string contains any substrings held in an array.

How do I check if string contains substring? [duplicate] Asked 15 years, 4 months ago Modified 4 years, 8 months ago Viewed 2.0m times

Nov 24, 2009 · Usually I would expect a String.contains() method, but there doesn't seem to be one. What is a reasonable way to check for this?