JavaScript String startsWith()
Examples
Start at position 0 (true):
let text = "Hello world, welcome to the universe.";
text.startsWith("Hello");
Try it Yourself »
text.startsWith("Hello");
Start at position 1 (false):
let text = "Hello world, welcome to the universe.";
text.startsWith("Hello", 1);
Try it Yourself »
text.startsWith("Hello", 1);
Description
The startsWith() method returns true
if a string starts with a specified string.
Otherwise it returns false.
The startsWith() method is case sensitive.
See Also:
Syntax
string.startsWith(searchValue, start)
Parameters
Parameter
Description
searchValue
Required.
The string to search for.
The string to search for.
start
Optional.
Start position. Default is 0.
Start position. Default is 0.
Return Value
Type
Description
A boolean Returns
Otherwise it returns
true if the string starts with the value.Otherwise it returns
false.
Browser Support
startsWith() is an ECMAScript6 (ES6 2015) feature.
JavaScript 2015 is supported in all browsers since June 2017:
| Chrome 51 |
Edge 15 |
Firefox 54 |
Safari 10 |
Opera 38 |
| May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |