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Ie11 syntax error regular expression

01/ 17/ ; 2 minutes to read; Contributors. Mike Jones · Saisang Cai. The structure of your search string violates one or more of the grammatical rules of a JavaScript. Im trying to replace illegal characters from a filename using a regular expression in javascript but it keeps falling over in IE 11 with ' Syntax error in regular expression'. The same code works fine in Chrome and Edge. javascript internet- explorer. below piece of code does not work in IE 11 it throws a syntax error in the console g. IE 11 as it is not supported. Change those to regular functions and your code should work as you expect g. You don' t need to create another regex variable using RegExp constructor. Just use only the below. var patternForEmail = / ^ ( [ a- zA- Z0- 9_ \ - \. [ 0- 9 ] { 1, 3} \. [ 0- 9] { 1, 3} \.

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  • Video:Regular expression syntax

    Syntax expression error

    ) | ( ( [ a- zA- Z0- 9\ - ] + \. [ a- zA- Z] { 2, 4} | [ 0- 9] { 1, 3} ) $ / i;. Chrome/ Firfox that now support ECMAScript 6 support regex literals inside a RegExp constructor. IE - as of now - still does not support that. See MDN reference: Starting with ECMAScript 6, new RegExp( / ab+ c/, ' i' ) no longer throws a TypeError. Here is an example of what the RegEx returns in Chrome: 0: " " 1: " < a href= " http: / / domainName. com/ / 02/ 05/ some- post- slug/ " > " 2: " some- post- slug". Firefox Error: " SyntaxError: invalid regexp group" ( Firefox version 58. That' s because the RegExp constructor in IE11 only takes a string as its first argument, and not a regular expression literal: RegExp( " _ if| _ elseif| _ else| _ while| _ store", " g" ) ^ ^. Alternatively, you can simply add the g flag to the. It seems IE11 can' t handle alternation where the first branch is empty. This: ( | [ A- WY- Z0- 9] [ A- Z0- 9] { 2} | X{ 3} ). should be equivalent to this: ( (?

    : [ A- WY- Z0- 9] [ A- Z0- 9] { 2} | X{ 3} )? meaning [ A- WY- Z0- 9] [ A- Z0- 9] { 2} or X{ 3} or nothing,. You are trying to use a regular expression with the unicode flag ( " u" ) which is not supported by any Internet Explorer < = 11. You can try to use a library like XRegExp.