RegExp.prototype.ignoreCase
The ignoreCase
accessor property indicates whether or not the i
flag is used with the regular expression.
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Description
RegExp.prototype.ignoreCase
has the value true
if the i
flag was used; otherwise, false
. The i
flag indicates that case should be ignored while attempting a match in a string.
If the regex has the unicode
flag, the case mapping happens as specified in CaseFolding.txt
. Otherwise, case mapping uses the Unicode Default Case Conversion — the same algorithm used in String.prototype.toUpperCase()
and String.prototype.toLowerCase()
.
The set accessor of ignoreCase
is undefined
. You cannot change this property directly.
Examples
Using ignoreCase
const regex = /foo/i;
console.log(regex.ignoreCase); // true
Specifications
Specification |
---|
ECMAScript Language Specification # sec-get-regexp.prototype.ignorecase |
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