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Selected Reading
JavaScript WebAPI File File.type Property
The JavaScript File WebAPI file.type property indicated the media type of the file.
Following is the code for the File WebApi File.type property −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 18px;
font-weight: 500;
color: red;
}
</style>
</head>
<body>
<h1>JavaScript file.type property</h1>
<div class="result"></div>
<input type="file" class="fileInput" />
<h3>Upload a file using the above input type to get its file type</h3>
<script>
let resultEle = document.querySelector(".result");
document
.querySelector(".fileInput")
.addEventListener("change", (event) => {
resultEle.innerHTML +=
"File name = " + event.target.files[0].name + "<br>";
resultEle.innerHTML += "File type = " + event.target.files[0].type;
});
</script>
</body>
</html>
Output

On clicking the “Choose file” button −

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