Baseline Widely available
XMLHttpRequest.readyState ããããã£ã¯ XMLHttpRequest (XHR) ã¯ã©ã¤ã¢ã³ãã®ç¶æ ãè¿ãã¾ããXHR ã¯ã©ã¤ã¢ã³ãã¯æ¬¡ã®ç¶æ ã®ãããããã¨ãã¾ãã
å¤ ç¶æ 説æ0
UNSENT
ã¯ã©ã¤ã¢ã³ãã¯ä½ææ¸ã¿ã open()
ã¯ã¾ã å¼ã°ãã¦ããªãã 1
OPENED
open()
ãå¼ã³åºãæ¸ã¿ã 2
HEADERS_RECEIVED
send()
ãå¼ã³åºãæ¸ã¿ã§ããããã¼ã¨ã¹ãã¼ã¿ã¹ãå©ç¨å¯è½ã 3
LOADING
ãã¦ã³ãã¼ãä¸ãresponseText
ã«ã¯é¨åãã¼ã¿ãå
¥ã£ã¦ããã 4
DONE
æä½ãå®äºããã
XMLHttpRequest ã¯ã©ã¤ã¢ã³ãã¯ä½ææ¸ã¿ã ããã¾ã open() ã¡ã½ããã¯å¼ã°ãã¦ããªãã
open() ã¡ã½ããã¯å®è¡æ¸ã¿ããã®ç¶æ ã®éã¯ããªã¯ã¨ã¹ããããã¼ã setRequestHeader() ã¡ã½ããã使ã£ã¦ã»ããã§ããsend() ã¡ã½ãããå¼ã³åºãã¨åå¾ãéå§ã§ããã
send() ãå¼ã³åºãããï¼ããããã°ï¼ãã¹ã¦ã®ãªãã¤ã¬ã¯ãããã©ãã ã¬ã¹ãã³ã¹ãããã¼ãåä¿¡ãã¾ããã
ã¬ã¹ãã³ã¹æ¬æãåä¿¡ä¸ã responseType
ã "text" ã¾ãã¯ç©ºæååã®å ´åã responseText
ã¯èªã¿è¾¼ã¿ä¸ã®é¨åçãªããã¹ãã«ãªãã
å徿ä½ãå®äºãã¦ãããããã¯ãã¼ã¿è»¢éãæåã¾ãã¯å¤±æã§å®äºãããã¨ãæå³ãã¦ããã
const xhr = new XMLHttpRequest();
console.log("UNSENT", xhr.readyState); // readyState 㯠0 ã«ãªã
xhr.open("GET", "/api", true);
console.log("OPENED", xhr.readyState); // readyState 㯠1 ã«ãªã
xhr.onprogress = () => {
console.log("LOADING", xhr.readyState); // readyState 㯠3 ã«ãªã
};
xhr.onload = () => {
console.log("DONE", xhr.readyState); // readyState 㯠4 ã«ãªã
};
xhr.send(null);
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