Baseline Widely available
loadstart
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ãã®ã¤ãã³ãåã addEventListener()
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addEventListener("loadstart", (event) => {});
onloadstart = (event) => {};
ã¤ãã³ãå
ProgressEvent
ã§ãã Event
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親ã§ãã Event
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lengthComputable
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loaded
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64 ããã符å·ãªãæ´æ°å¤ã§ããã®ããã»ã¹ã§æ¢ã«ä½æ¥ãè¡ã£ãéã示ãã¾ãã使¥ããæ¯çã¯ãtotal
ããã®ããããã£ã®å¤ã§å²ããã¨ã§ç®åºã§ãã¾ãã HTTP ã使ç¨ãã¦ãªã½ã¼ã¹ããã¦ã³ãã¼ãããå ´åããã㯠HTTP ã¡ãã»ã¼ã¸ã®æ¬æã®ã¿ãã«ã¦ã³ããããããã¼ããã®ä»ã®ãªã¼ãã¼ãããã¯å«ã¾ãã¾ããã
total
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64 ããã符å·ãªãæ´æ°ã§ãåºç¤ã¨ãªãããã»ã¹ãå®è¡ä¸ã®ä½æ¥ã®ç·éã表ãã¾ãã HTTP ã使ç¨ãã¦ãªã½ã¼ã¹ããã¦ã³ãã¼ãããå ´åããã㯠Content-Length
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loadstart
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loadstart
ã¤ãã³ãã使ç¨ããã¨ãã¢ãããã¼ãã®éå§ãæ¤åºãããã¨ãã§ãã¾ãããã¡ã¤ã«ãã¢ãããã¼ããã¦é²æãã¼ã表示ããå®å
¨ãªã³ã¼ãä¾ã«ã¤ãã¦ã¯ãã¡ã¤ã³ã® XMLHttpRequestUpload
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§ãã¦ãã ããã
// ã¢ãããã¼ããéå§ããæã«ã鲿ãã¼ã表示ãã
xhr.upload.addEventListener("loadstart", (event) => {
progressBar.classList.add("visible");
progressBar.value = 0;
progressBar.max = event.total;
log.textContent = "Uploading (0%)â¦";
abortButton.disabled = false;
});
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