Does the .split() method behave this way in IE8 as anticipated?

Encountered an issue with IE8 when using the .split() method.

element.name = 'question[10]';
var splitName = element.name.split(/\[([0-9]+)\]/);
// The split name array only contains one element in IE8,
//    splitName[0] == 'question'
// Whereas in Chrome/Firefox it has three elements
//     splitName[0] == 'question'
//     splitName[1] == '10'
//     splitName[2] == ''

Managed to find a solution by utilizing this code snippet. However, I am curious to know if this behavior is a bug specific to IE8 or if it is expected. Is there a better approach to achieving the same outcome without having to modify the split method?

javascriptinternet-explorer-8

Answer №1

This behavior is considered normal.

According to the MDN:

If the separator is a regular expression with capturing parentheses, each time it matches, the results of the captured parentheses are included in the output array (even if they are undefined). However, not all browsers support this functionality.)

By removing the parentheses from the regular expression, the results will be very similar (Chrome and Firefox interpret the 'separator' at the end of a string literally, resulting in an additional empty string).

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