JavaScript File Download Function: SaveAsFile - Code Example and Explanation - 常规

This JavaScript code defines a function called SaveAsFile that allows you to save a file on the client-side using a specified filename and base64-encoded file content.\n\nHere's how it works:\n\n1. It creates an <a> element using the document.createElement method.\n2. It sets the download attribute of the <a> element to the specified filename. \n3. It sets the href attribute of the <a> element to a data URL that represents the file content. The data URL is constructed by appending the bytesBase64 (base64-encoded file content) to the data:application/octet-stream;base64, prefix.\n4. It appends the <a> element to the <body> element using the appendChild method.\n5. It triggers a click event on the <a> element using the click method.\n6. It removes the <a> element from the <body> element using the removeChild method.\n\nThis code allows you to dynamically generate a file on the client-side and prompt the user to save it with the specified filename. The file content should be provided as a base64-encoded string in the bytesBase64 parameter.