Baseline 2023
Newly available
isWellFormed()
㯠String
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ãªãã
è¿å¤ãã®æååã«å¤ç«ãµãã²ã¼ãããªãå ´å㯠true
ãããã§ãªãã° false
ã
JavaScript ã®æåå㯠UTF-16 ã¨ã³ã³ã¼ãã§ããUTF-16 ã¨ã³ã³ã¼ãã£ã³ã°ã«ã¯ããµãã²ã¼ããã¢ãã®æ¦å¿µããããUTF-16 æåãUnicode ã³ã¼ããã¤ã³ããæ¸è¨ç´ ã¯ã©ã¹ã¿ã¼ã®ç¯ã§è©³ããç´¹ä»ããã¦ãã¾ãã
isWellFormed()
ã使ãã¨ãæååãæ´å½¢å¼ã§ãããã©ããï¼ã¤ã¾ããå¤ç«ãµãã²ã¼ããå«ã¾ãªããã©ããï¼ããã¹ããããã¨ãã§ãã¾ãã ã«ã¹ã¿ã å®è£
ã¨æ¯ã¹ãã¨ãisWellFormed()
ã¯ãã¨ã³ã¸ã³ãæååã®å
é¨è¡¨ç¾ã«ç´æ¥ã¢ã¯ã»ã¹ã§ããã®ã§ãããå¹ççã§ãã æååãæ´å½¢å¼æååã«å¤æããå¿
è¦ãããå ´åã¯ãtoWellFormed()
ã¡ã½ããã使ã£ã¦ãã ããã isWellFormed()
ã使ãã¨ãæ´å½¢å¼ã§ãªãæååãæ´å½¢å¼æååã¨ã¯ç°ãªãå½¢ã§æ±ããã¨ãã§ããä¾ãã°ãã¨ã©ã¼ãçºçãããããç¡å¹ã¨ããããããã¨ãã§ãã¾ãã
const strings = [
// å¤ç«ä¸ä½ãµãã²ã¼ã
"ab\uD800",
"ab\uD800c",
// å¤ç«ä¸ä½ãµãã²ã¼ã
"\uDFFFab",
"c\uDFFFab",
// æ´å½¢å¼
"abc",
"ab\uD83D\uDE04c",
];
for (const str of strings) {
console.log(str.isWellFormed());
}
// Logs:
// false
// false
// false
// false
// true
// true
encodeURI() ã®ã¨ã©ã¼ãåé¿
encodeURI
ã¯æ¸¡ãããæååãæ´å½¢å¼ã§ãªãã£ãå ´åã«ã¨ã©ã¼ãçºçãã¾ãããã㯠isWellFormed()
ã使ç¨ãã¦ãæååã encodeURI()
ã«æ¸¡ãåã«æ¤æ»ãããã¨ã§åé¿ã§ãã¾ãã
const illFormed = "https://example.com/search?q=\uD800";
try {
encodeURI(illFormed);
} catch (e) {
console.log(e); // URIError: URI malformed
}
if (illFormed.isWellFormed()) {
console.log(encodeURI(illFormed));
} else {
console.warn("æ´å½¢å¼ã§ãªãæååã«ééãã¾ããã"); // æ´å½¢å¼ã§ãªãæååã«ééãã¾ããã
}
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