The toString()
method returns a string representing the regular expression.
regexObj.toString();
A string representing the given object.
The RegExp
object overrides the toString()
method of the Object
object; it does not inherit Object.prototype.toString()
. For RegExp
objects, the toString()
method returns a string representation of the regular expression.
The following example displays the string value of a RegExp
object:
var myExp = new RegExp('a+b+c'); console.log(myExp.toString()); // logs '/a+b+c/' var foo = new RegExp('bar', 'g'); console.log(foo.toString()); // logs '/bar/g'
Starting with ECMAScript 5, an empty regular expression returns the string "/(?:)/" and line terminators such as "\n" are escaped:
new RegExp().toString(); // "/(?:)/" new RegExp('\n').toString() === '/\n/'; // true, prior to ES5 new RegExp('\n').toString() === '/\\n/'; // true, starting with ES5
Specification |
---|
ECMAScript (ECMA-262) The definition of 'RegExp.prototype.toString' in that specification. |
Desktop | ||||||
---|---|---|---|---|---|---|
toString |
1 | 12 | 1 | 4 | 5 | 1 |
Escaping | 73 | 12 | 38 | 9 | 60 | 6 |
Mobile | ||||||
---|---|---|---|---|---|---|
toString |
1 | 18 | 4 | 10.1 | 1 | 1.0 |
Escaping | 73 | 73 | 38 | 52 | 6 | No |
Server | |
---|---|
toString |
0.1.100 |
Escaping | 12.0.0 |
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https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/toString