Feb 24, 2012 · Use RegEx source and flags to separate the regular expression from the flags. Then create a new one with the string and set the needed flags. var re = /^[a-z]*$/; var re2 = …

RegExp.prototype.flags = function { return (this.ignoreCase ? "i" : "") + (this.multiline ? "m" : "") + (this.global ? "g" : ""); }; var reg1 = /AAA/i; var reg2 = new RegExp(reg1.source, reg1.flags() + 'g');

Apr 19, 2012 · First, we have to turn the individual IP patterns into regular expressions matching their intent. One regular expression for "all IPs of the form '12.122.X.X'" is this: ^ means the …

To give multiple flags to a regex, we write them one after another (without any spaces or other delimiters). For example, if we were to give both the flags i and g to the regex /a/, we'd write …

Oct 28, 2024 · A regular expression may have multiple capturing groups. In results, matches to capturing groups typically in an array whose members are in the same order as the left …

Using multiple flags You can very easily specify multiple flags, if needed. For instance, you may need to perform a case-insensitive, multiline, global search, and that's not a problem - simply …

Jan 24, 2025 · Regular expressions have optional flags that allow for functionality like global searching and case-insensitive searching. These flags can be used separately or together in …

Nov 29, 2024 · Use a string as the first argument to the RegExp() constructor when you want to build the regular expression from dynamic input. The expression new RegExp(/ab+c/, flags) …

Dec 7, 2020 · A regular expression consists of a pattern and optional flags: g, i, m, u, s, y. Without flags and special symbols (that we’ll study later), the search by a regexp is the same as a …

Dec 5, 2024 · The multiline property of a JavaScript regular expression indicates whether the m (multiline) flag is enabled. When enabled, the ^ and $ anchors match the start and end of each …