The **`startsWith()` method** in JavaScript is a `String` method that is used to check if a particular string starts with the exact string that is passed as an argument.

---
> The `startsWith()` method is case sensitive.
---

#   
## Syntax

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```
[any_string].startsWith([defined_string])

// OR
[any_string].startsWith([defined_string], [position])
```
---

An example of this method is:

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```
"hell worlds".startsWith("hello");
```
---

# 
#  Parameters

* **`defined_string`**: This is the specified string you want to search for in the main string.

* **`position`**: This is the position you want the search to start from. It is a zero-based index numbering.

##  
## Return value

The `startsWith()` method returns a `Boolean` value which could either be `true` or `false`. 

If the string actually begins with the specified argument, then the `true` value is returned. Otherwise, `false` is returned.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>startsWith()</title>
</head>
<body>
    <p>
        Enter edpresso is awesome in the textbox below
    </p>
    <input type="text" name="" id="inputBox" placeholder="edpresso">
</body>
</html>

let inputBox = document.getElementById("inputBox");
        inputBox.addEventListener("input", (event)=>{
            if(event.target.value.toLowerCase().startsWith("edpresso")){
                alert("yipppeee!\nInput starts with 'edpresso'!😊")
            }
        })

codemirror

#   
## Explanation

In the code above, as the user inputs text into the textbox, if it starts with "edpresso," then we alert the user that their input starts with "edpresso."

This is achieved with the JavaScript line of code below:


let inputBox = document.getElementById("inputBox");
inputBox.addEventListener("input", (event) => {
  if (event.target.value.toLowerCase().startsWith("edpresso")) {
    alert("yipppeee!\nInput starts with 'edpresso'!😊")
  }
})

How to use the startsWith() method in JavaScript

The `startsWith()` method checks if a string starts with a specified substring, returning true or false.