Quick Reference
The String startsWith() method returns “true” if a string starts with a specified string, if not, it returns “false”. The startsWith() method is case sensitive.
<!-- html element to place output -->
<p id="my_output"></p>
Example 1:
// variables
let my_message = 'Hello World';
let result = my_message.startsWith('Hello'); // search entire string
// output to the HTML element
document.getElementById('my_output').innerHTML = result;
Example 2:
// variables
let my_message = 'Hello World';
let result = my_message.startsWith('World', 6); // start at position 6
// output to the HTML element
document.getElementById('my_output').innerHTML = result;
Note
When counting characters in a string, the count starts from zero NOT one. So character 1 is position [0], character 2 is position [1], and character 3 is position [2] … and so on.
Output
Example 1:
true
Example 2:
true
Syntax
string.startsWith(searchValue, start)
Parameters
Parameter | Description |
---|---|
searchvalue | The string to search for (required) |
start | The position to start from (default value is 0) |
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.