JavaScript ArrayBuffer.prototype.detached Last Updated : 01 Apr, 2024 Comments Improve Suggest changes Like Article Like Report In JavaScript, the ArrayBuffer.prototype.detached property indicates whether an ArrayBuffer instance has been transferred (detached) from its current context. This is especially important for web workers when dealing with large binary data for communication. Syntaxconst isDetached = arrayBufferInstance.detached;const buffer = new ArrayBuffer(16); // Create an ArrayBufferconst isDetached = buffer.detached; // Check if buffer is detachedconsole.log(isDetached); // Output: falsearrayBufferInstance: It is an existing ArrayBuffer object.isDetached: It is a boolean value that represents the detached state. Return ValueIt will return true if detached otherwise false. Example 1: The below example checks the detached state with property check. JavaScript function transferBufferToWorker(buffer) { // Simulate transferring the buffer to a worker return buffer; // This does not transfer the buffer in reality } const originalBuffer = new ArrayBuffer(10); const transferredBuffer = transferBufferToWorker(originalBuffer); // Property check to determine // if the buffer has been detached if (transferredBuffer.byteLength === 0) { console.log("The buffer has been transferred and is detached."); } else { console.log("The buffer remains in the current context."); } OutputThe buffer remains in the current context. Example 2: The below example ensure a detached state by the use of a utility function. JavaScript function transferBufferToWorker(buffer) { // Simulate transferring the buffer to a worker return buffer; // This does not transfer the buffer in reality } // Utility function to check if the buffer is detached function isBufferDetached(buffer) { try { // Attempt to create a new view on the buffer new Uint8Array(buffer); // Buffer is not detached return false; } catch (error) { // Buffer is detached return true; } } const originalBuffer = new ArrayBuffer(10); const transferredBuffer = transferBufferToWorker(originalBuffer); // Check if the buffer is detached // using the utility function if (isBufferDetached(transferredBuffer)) { console.log("The buffer has been transferred and is detached."); } else { console.log("The buffer remains in the current context."); } OutputThe buffer remains in the current context. 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