The blob object is used for representing a blob object which is immutable and is used for representing raw data. The blob has a size and mime type property just like a file has. File is a derivation of blob and blob can be used in places where the file is used.
Following is the code showing blob object in JavaScript −
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: rebeccapurple; } </style> </head> <body> <h1>Blob object in JavaScript</h1> <div class="result"></div> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to create and display a blob object</h3> <script> let resEle = document.querySelector(".result"); document.querySelector(".Btn").addEventListener("click", () => { let blob = new Blob(["This is a sample blob"], { type: "text/plain" }); resEle.innerHTML = "blob.type = " + blob.type + "<br>"; resEle.innerHTML += "blob.size = " + blob.size; }); </script> </body> </html>
Output
The above code will produce the following output −
On clicking the ‘CLICK HERE’ button −