HTML5 ã® Drag and Drop API 㨠File API を使ã£ã¦ãƒ•ã‚¡ã‚¤ãƒ«ã‚¢ãƒƒãƒ—ãƒãƒ¼ãƒ‰ã‚’実装ã™ã‚‹ - ã—ã°ã‚„ん雑記
HTML5 ã® Drag and Drop API を使ã†ã“ã¨ã§ã€ãƒ–ラウザã«ãƒ‰ãƒãƒƒãƒ—ã•ã‚ŒãŸãƒ•ã‚¡ã‚¤ãƒ«ã®æƒ…å ±ã‚’æ‰±ã†ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ãã—㦠File API を組ã¿åˆã‚ã›ã‚‹ã“ã¨ã§ã€ãƒ•ã‚¡ã‚¤ãƒ«ã®ä¸èº«ã¾ã§æ‰±ã†ã“ã¨ãŒå‡ºæ¥ã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã™ã€‚ ãã—㦠FormData オブジェクト㨠XHR を組ã¿åˆã‚ã›ã‚‹ã“ã¨ã§ã‚¢ãƒƒãƒ—ãƒãƒ¼ãƒ‰å‡¦ç†ã¾ã§ã‚’実装ã™ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚完æˆå›³ã¯ã“ã‚“ãªæ„Ÿã˜ã§ã™ã€‚ 今回㯠JavaScript ã®å‡¦ç†ãŒä¸å¿ƒã§ã™ã€‚jQuery を使ã£ã¦ã„ã‚‹ã®ã§è¿½åŠ ã—ã¦ãã ã•ã„ã。 $(function () { var uploadFiles = function (files) { // FormData ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’ç”¨æ„ var fd = new FormData(); // ãƒ•ã‚¡ã‚¤ãƒ«æƒ…å ±ã‚’è¿½åŠ ã™ã‚‹ for (var i = 0; i < files.length; i++) { fd.append(
Read files in JavaScript  | Articles  | web.dev
Selecting and interacting with files on the user's local device is one of the most commonly used features of the web. It allows users to select files and upload them to a server, for example, when sharing photos or submitting tax documents. It also allows sites to read and manipulate them without ever having to transfer the data across the network. This page walks through how to use JavaScript to
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