RegExp test()
Example
Search a string for the character "e":
let text = "The best things in life are free";
let pattern = /e/;
let result = pattern.test(text);
Try it Yourself »
Description
The test() method tests for a match in a string.
If it finds a match, it returns true, otherwise it returns false.
Syntax
regexp.test(string)
Parameter Values
| Parameter | Description |
|---|---|
| string | Required. The string to be searched |
Return Value
| Type | Description |
|---|---|
| Boolean | Returns true if it finds a match, otherwise false |
More Examples
Example
Do a global search, and test for "Hello" and "W3Schools" in a string:
// The string:
let text = "Hello world!";
// Look for "Hello"
let pattern1 = /Hello/g;
let result1 = pattern1.test(text);
// Look for "W3Schools"
let pattern2 = /W3Schools/g;
let result2 = pattern2.test(text);
Try it Yourself »
Regular Expression Methods
Regular Expression Search and Replace can be done with different methods.
These are the most common:
String Methods
| Method | Description |
|---|---|
| match(regex) | Returns an Array of results |
| matchAll(regex) | Returns an Iterator of results |
| replace(regex) | Returns a new String |
| replaceAll(regex) | Returns a new String |
| search(regex) | Returns the index of the first match |
| split(regex) | Returns an Array of results |
RegExp Methods
| Method | Description |
|---|---|
| regex.exec() | Returns an Iterator of results |
| regex.test() | Returns true or false |
Browser Support
regexp.test() is an ECMAScript1 (JavaScript 1997) feature.
It is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |
