{"id":78031,"date":"2026-02-25T23:05:45","date_gmt":"2026-02-25T15:05:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78031.html"},"modified":"2026-02-25T23:05:45","modified_gmt":"2026-02-25T15:05:45","slug":"javascript-%e5%ad%97%e9%9d%a2%e9%87%8f77788","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78031.html","title":{"rendered":"JavaScript \u5b57\u9762\u91cf77788"},"content":{"rendered":"

JavaScript\u00a0\u8bed\u6cd5<\/h2>\n
\n

JavaScript \u662f\u4e00\u4e2a\u7a0b\u5e8f\u8bed\u8a00\u3002\u8bed\u6cd5\u89c4\u5219\u5b9a\u4e49\u4e86\u8bed\u8a00\u7ed3\u6784\u3002<\/p>\n

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JavaScript \u8bed\u6cd5<\/h3>\n

JavaScript \u662f\u4e00\u4e2a\u811a\u672c\u8bed\u8a00\u3002<\/p>\n

\u5b83\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7，\u4f46\u529f\u80fd\u5f3a\u5927\u7684\u7f16\u7a0b\u8bed\u8a00\u3002<\/p>\n

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JavaScript \u5b57\u9762\u91cf<\/h3>\n

\u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d，\u4e00\u822c\u56fa\u5b9a\u503c\u79f0\u4e3a\u5b57\u9762\u91cf，\u5982 3.14\u3002<\/p>\n

\u6570\u5b57（Number）\u5b57\u9762\u91cf\u00a0\u53ef\u4ee5\u662f\u6574\u6570\u6216\u8005\u662f\u5c0f\u6570，\u6216\u8005\u662f\u79d1\u5b66\u8ba1\u6570(e)\u3002<\/p>\n

3.14 1001 https:\/\/avg.163.com\/topic\/detail\/12449497 https:\/\/avg.163.com\/topic\/detail\/12449496 https:\/\/avg.163.com\/topic\/detail\/12449495 https:\/\/avg.163.com\/topic\/detail\/12449492 https:\/\/avg.163.com\/topic\/detail\/12449491 https:\/\/avg.163.com\/topic\/detail\/12449490 https:\/\/avg.163.com\/topic\/detail\/12449489 https:\/\/avg.163.com\/topic\/detail\/12449488 https:\/\/avg.163.com\/topic\/detail\/12449487 https:\/\/avg.163.com\/topic\/detail\/12449486 https:\/\/avg.163.com\/topic\/detail\/12449485 https:\/\/avg.163.com\/topic\/detail\/12449484 https:\/\/avg.163.com\/topic\/detail\/12449480 https:\/\/avg.163.com\/topic\/detail\/12449481 https:\/\/avg.163.com\/topic\/detail\/12449449 https:\/\/avg.163.com\/topic\/detail\/12449478 https:\/\/avg.163.com\/topic\/detail\/12449479 https:\/\/avg.163.com\/topic\/detail\/12449463 https:\/\/avg.163.com\/topic\/detail\/12449447 https:\/\/avg.163.com\/topic\/detail\/12449466 https:\/\/avg.163.com\/topic\/detail\/12449477 https:\/\/avg.163.com\/topic\/detail\/12449475 https:\/\/avg.163.com\/topic\/detail\/12449471 https:\/\/avg.163.com\/topic\/detail\/12449473 https:\/\/avg.163.com\/topic\/detail\/12449476 https:\/\/avg.163.com\/topic\/detail\/12449474 https:\/\/avg.163.com\/topic\/detail\/12449468 https:\/\/avg.163.com\/topic\/detail\/12449469 https:\/\/avg.163.com\/topic\/detail\/12449458 https:\/\/avg.163.com\/topic\/detail\/12449247 https:\/\/avg.163.com\/topic\/detail\/12449461 https:\/\/avg.163.com\/topic\/detail\/12449464 https:\/\/avg.163.com\/topic\/detail\/12449460 https:\/\/avg.163.com\/topic\/detail\/12449455 https:\/\/avg.163.com\/topic\/detail\/12449453 https:\/\/avg.163.com\/topic\/detail\/12449456 https:\/\/avg.163.com\/topic\/detail\/12449451 https:\/\/avg.163.com\/topic\/detail\/12449277 https:\/\/avg.163.com\/topic\/detail\/12449219 https:\/\/avg.163.com\/topic\/detail\/12449249 https:\/\/avg.163.com\/topic\/detail\/12449256 https:\/\/avg.163.com\/topic\/detail\/12449232 https:\/\/avg.163.com\/topic\/detail\/12449457 https:\/\/avg.163.com\/topic\/detail\/12449454 https:\/\/avg.163.com\/topic\/detail\/12449450 https:\/\/avg.163.com\/topic\/detail\/12449452 https:\/\/avg.163.com\/topic\/detail\/12449448 https:\/\/avg.163.com\/topic\/detail\/12449446 https:\/\/avg.163.com\/topic\/detail\/12449445 https:\/\/avg.163.com\/topic\/detail\/12449444 https:\/\/avg.163.com\/topic\/detail\/12449442 https:\/\/avg.163.com\/topic\/detail\/12449443 https:\/\/avg.163.com\/topic\/detail\/12449440 https:\/\/avg.163.com\/topic\/detail\/12449441 https:\/\/avg.163.com\/topic\/detail\/12449439 https:\/\/avg.163.com\/topic\/detail\/12449437 https:\/\/avg.163.com\/topic\/detail\/12449436 https:\/\/avg.163.com\/topic\/detail\/12449435 https:\/\/avg.163.com\/topic\/detail\/12449434 https:\/\/avg.163.com\/topic\/detail\/12449433 https:\/\/avg.163.com\/topic\/detail\/12449432 https:\/\/avg.163.com\/topic\/detail\/12449431 https:\/\/avg.163.com\/topic\/detail\/12449430 https:\/\/avg.163.com\/topic\/detail\/12449428 https:\/\/avg.163.com\/topic\/detail\/12449429 https:\/\/avg.163.com\/topic\/detail\/12449427 https:\/\/avg.163.com\/topic\/detail\/12449426 https:\/\/avg.163.com\/topic\/detail\/12449425 https:\/\/avg.163.com\/topic\/detail\/12449424 https:\/\/avg.163.com\/topic\/detail\/12449423 https:\/\/avg.163.com\/topic\/detail\/12449422 https:\/\/avg.163.com\/topic\/detail\/12449421 https:\/\/avg.163.com\/topic\/detail\/12449420 https:\/\/avg.163.com\/topic\/detail\/12449418 https:\/\/avg.163.com\/topic\/detail\/12449419 https:\/\/avg.163.com\/topic\/detail\/12449416 https:\/\/avg.163.com\/topic\/detail\/12449414 https:\/\/avg.163.com\/topic\/detail\/12449417 https:\/\/avg.163.com\/topic\/detail\/12449415 https:\/\/avg.163.com\/topic\/detail\/12449413 https:\/\/avg.163.com\/topic\/detail\/12449412 https:\/\/avg.163.com\/topic\/detail\/12449409 https:\/\/avg.163.com\/topic\/detail\/12449410 https:\/\/avg.163.com\/topic\/detail\/12449408 https:\/\/avg.163.com\/topic\/detail\/12449407 https:\/\/avg.163.com\/topic\/detail\/12449406 https:\/\/avg.163.com\/topic\/detail\/12449405 https:\/\/avg.163.com\/topic\/detail\/12449404 https:\/\/avg.163.com\/topic\/detail\/12449403 https:\/\/avg.163.com\/topic\/detail\/12449402 https:\/\/avg.163.com\/topic\/detail\/12449401 https:\/\/avg.163.com\/topic\/detail\/12449399 https:\/\/avg.163.com\/topic\/detail\/12449398 https:\/\/avg.163.com\/topic\/detail\/12449396 https:\/\/avg.163.com\/topic\/detail\/12449400 https:\/\/avg.163.com\/topic\/detail\/12448489 https:\/\/avg.163.com\/topic\/detail\/12448264 https:\/\/avg.163.com\/topic\/detail\/12449391 https:\/\/avg.163.com\/topic\/detail\/12448490 https:\/\/avg.163.com\/topic\/detail\/12449393 https:\/\/avg.163.com\/topic\/detail\/12449392 https:\/\/avg.163.com\/topic\/detail\/12449390 https:\/\/avg.163.com\/topic\/detail\/12449388 https:\/\/avg.163.com\/topic\/detail\/12449389 https:\/\/avg.163.com\/topic\/detail\/12449387 https:\/\/avg.163.com\/topic\/detail\/12449382 https:\/\/avg.163.com\/topic\/detail\/12449386 https:\/\/avg.163.com\/topic\/detail\/12449384 https:\/\/avg.163.com\/topic\/detail\/12449383 https:\/\/avg.163.com\/topic\/detail\/12449379 https:\/\/avg.163.com\/topic\/detail\/12449376 https:\/\/avg.163.com\/topic\/detail\/12449381 https:\/\/avg.163.com\/topic\/detail\/12449380 https:\/\/avg.163.com\/topic\/detail\/12449378 https:\/\/avg.163.com\/topic\/detail\/12449375 https:\/\/avg.163.com\/topic\/detail\/12449377 https:\/\/avg.163.com\/topic\/detail\/12449374 https:\/\/avg.163.com\/topic\/detail\/12449373 https:\/\/avg.163.com\/topic\/detail\/12449372 https:\/\/avg.163.com\/topic\/detail\/12449371 https:\/\/avg.163.com\/topic\/detail\/12449370 https:\/\/avg.163.com\/topic\/detail\/12449362 https:\/\/avg.163.com\/topic\/detail\/12449367 https:\/\/avg.163.com\/topic\/detail\/12449369 https:\/\/avg.163.com\/topic\/detail\/12449366 https:\/\/avg.163.com\/topic\/detail\/12449368 https:\/\/avg.163.com\/topic\/detail\/12449364 https:\/\/avg.163.com\/topic\/detail\/12449363 https:\/\/avg.163.com\/topic\/detail\/12449360 https:\/\/avg.163.com\/topic\/detail\/12449361 https:\/\/avg.163.com\/topic\/detail\/12449359 https:\/\/avg.163.com\/topic\/detail\/12449358 https:\/\/avg.163.com\/topic\/detail\/12449357 https:\/\/avg.163.com\/topic\/detail\/12449356 https:\/\/avg.163.com\/topic\/detail\/12449355 https:\/\/avg.163.com\/topic\/detail\/12449354 https:\/\/avg.163.com\/topic\/detail\/12449353 https:\/\/avg.163.com\/topic\/detail\/12449352 https:\/\/avg.163.com\/topic\/detail\/12449351 https:\/\/avg.163.com\/topic\/detail\/12449344 https:\/\/avg.163.com\/topic\/detail\/12449345 https:\/\/avg.163.com\/topic\/detail\/12449350 https:\/\/avg.163.com\/topic\/detail\/12449349 https:\/\/avg.163.com\/topic\/detail\/12449347 https:\/\/avg.163.com\/topic\/detail\/12449346 https:\/\/avg.163.com\/topic\/detail\/12449343 https:\/\/avg.163.com\/topic\/detail\/12449342 https:\/\/avg.163.com\/topic\/detail\/12449341 https:\/\/avg.163.com\/topic\/detail\/12449339 https:\/\/avg.163.com\/topic\/detail\/12449337 https:\/\/avg.163.com\/topic\/detail\/12449336 https:\/\/avg.163.com\/topic\/detail\/12449338 https:\/\/avg.163.com\/topic\/detail\/12449335 https:\/\/avg.163.com\/topic\/detail\/12449334 https:\/\/avg.163.com\/topic\/detail\/12449333 https:\/\/avg.163.com\/topic\/detail\/12449330 https:\/\/avg.163.com\/topic\/detail\/12449329 https:\/\/avg.163.com\/topic\/detail\/12449332 https:\/\/avg.163.com\/topic\/detail\/12449331 https:\/\/avg.163.com\/topic\/detail\/12449327 https:\/\/avg.163.com\/topic\/detail\/12448404 https:\/\/avg.163.com\/topic\/detail\/12448472 https:\/\/avg.163.com\/topic\/detail\/12448449 https:\/\/avg.163.com\/topic\/detail\/12449321 https:\/\/avg.163.com\/topic\/detail\/12448435 https:\/\/avg.163.com\/topic\/detail\/12448432 https:\/\/avg.163.com\/topic\/detail\/12449317 https:\/\/avg.163.com\/topic\/detail\/12449319 https:\/\/avg.163.com\/topic\/detail\/12449318 https:\/\/avg.163.com\/topic\/detail\/12449316 https:\/\/avg.163.com\/topic\/detail\/12449315 https:\/\/avg.163.com\/topic\/detail\/12449313 https:\/\/avg.163.com\/topic\/detail\/12449312 https:\/\/avg.163.com\/topic\/detail\/12449310 https:\/\/avg.163.com\/topic\/detail\/12449311 https:\/\/avg.163.com\/topic\/detail\/12449309 https:\/\/avg.163.com\/topic\/detail\/12449308 https:\/\/avg.163.com\/topic\/detail\/12449307 https:\/\/avg.163.com\/topic\/detail\/12449306 https:\/\/avg.163.com\/topic\/detail\/12449305 https:\/\/avg.163.com\/topic\/detail\/12449304 https:\/\/avg.163.com\/topic\/detail\/12449302 https:\/\/avg.163.com\/topic\/detail\/12449301 https:\/\/avg.163.com\/topic\/detail\/12449298 https:\/\/avg.163.com\/topic\/detail\/12449295 https:\/\/avg.163.com\/topic\/detail\/12449294 https:\/\/avg.163.com\/topic\/detail\/12449290 https:\/\/avg.163.com\/topic\/detail\/12449291 https:\/\/avg.163.com\/topic\/detail\/12449289 https:\/\/avg.163.com\/topic\/detail\/12449288 https:\/\/avg.163.com\/topic\/detail\/12449287 https:\/\/avg.163.com\/topic\/detail\/12449282 https:\/\/avg.163.com\/topic\/detail\/12449285 https:\/\/avg.163.com\/topic\/detail\/12449284 https:\/\/avg.163.com\/topic\/detail\/12449283 https:\/\/avg.163.com\/topic\/detail\/12449274 https:\/\/avg.163.com\/topic\/detail\/12449279 https:\/\/avg.163.com\/topic\/detail\/12449281 https:\/\/avg.163.com\/topic\/detail\/12449280 https:\/\/avg.163.com\/topic\/detail\/12449273 https:\/\/avg.163.com\/topic\/detail\/12449271 https:\/\/avg.163.com\/topic\/detail\/12449270 https:\/\/avg.163.com\/topic\/detail\/12448385 https:\/\/avg.163.com\/topic\/detail\/12449268 https:\/\/avg.163.com\/topic\/detail\/12448434 https:\/\/avg.163.com\/topic\/detail\/12448400 https:\/\/avg.163.com\/topic\/detail\/12448395 https:\/\/avg.163.com\/topic\/detail\/12448379 https:\/\/avg.163.com\/topic\/detail\/12449267 https:\/\/avg.163.com\/topic\/detail\/12448376 https:\/\/avg.163.com\/topic\/detail\/12449265 https:\/\/avg.163.com\/topic\/detail\/12449264 https:\/\/avg.163.com\/topic\/detail\/12449263 https:\/\/avg.163.com\/topic\/detail\/12449262 https:\/\/avg.163.com\/topic\/detail\/12449259 https:\/\/avg.163.com\/topic\/detail\/12449260 https:\/\/avg.163.com\/topic\/detail\/12449256 https:\/\/avg.163.com\/topic\/detail\/12449258 https:\/\/avg.163.com\/topic\/detail\/12449257 https:\/\/avg.163.com\/topic\/detail\/12449255 https:\/\/avg.163.com\/topic\/detail\/12449254 https:\/\/avg.163.com\/topic\/detail\/12449252 https:\/\/avg.163.com\/topic\/detail\/12449253 https:\/\/avg.163.com\/topic\/detail\/12449251 https:\/\/avg.163.com\/topic\/detail\/12449250 https:\/\/avg.163.com\/topic\/detail\/12449249 https:\/\/avg.163.com\/topic\/detail\/12449248 https:\/\/avg.163.com\/topic\/detail\/12449246 https:\/\/avg.163.com\/topic\/detail\/12449247 https:\/\/avg.163.com\/topic\/detail\/12449245 https:\/\/avg.163.com\/topic\/detail\/12449239 https:\/\/avg.163.com\/topic\/detail\/12449243 https:\/\/avg.163.com\/topic\/detail\/12449242 https:\/\/avg.163.com\/topic\/detail\/12449237 https:\/\/avg.163.com\/topic\/detail\/12449233 https:\/\/avg.163.com\/topic\/detail\/12449231 https:\/\/avg.163.com\/topic\/detail\/12449230 https:\/\/avg.163.com\/topic\/detail\/12449228 https:\/\/avg.163.com\/topic\/detail\/12448355 https:\/\/avg.163.com\/topic\/detail\/12449227 https:\/\/avg.163.com\/topic\/detail\/12449224 https:\/\/avg.163.com\/topic\/detail\/12449222 https:\/\/avg.163.com\/topic\/detail\/12449225 https:\/\/avg.163.com\/topic\/detail\/12449220 https:\/\/avg.163.com\/topic\/detail\/12448371 https:\/\/avg.163.com\/topic\/detail\/12448360 https:\/\/avg.163.com\/topic\/detail\/12448341 https:\/\/avg.163.com\/topic\/detail\/12448430 https:\/\/avg.163.com\/topic\/detail\/12448347 https:\/\/avg.163.com\/topic\/detail\/12448338 https:\/\/avg.163.com\/topic\/detail\/12448143 https:\/\/avg.163.com\/topic\/detail\/12448331 https:\/\/avg.163.com\/topic\/detail\/12448366 https:\/\/avg.163.com\/topic\/detail\/12448346 https:\/\/avg.163.com\/topic\/detail\/12449219 https:\/\/avg.163.com\/topic\/detail\/12449218 https:\/\/avg.163.com\/topic\/detail\/12448345 https:\/\/avg.163.com\/topic\/detail\/12449217 123e5<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

\u5b57\u7b26\u4e32（String）\u5b57\u9762\u91cf\u00a0\u53ef\u4ee5\u4f7f\u7528\u5355\u5f15\u53f7\u6216\u53cc\u5f15\u53f7:<\/p>\n

"John Doe" 'John Doe'<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

\u8868\u8fbe\u5f0f\u5b57\u9762\u91cf\u00a0\u7528\u4e8e\u8ba1\u7b97：<\/p>\n

5 + 6 5 * 10<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

\u6570\u7ec4（Array）\u5b57\u9762\u91cf\u00a0\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4：<\/p>\n

[40, 100, 1, 5, 25, 10]<\/p>\n

\u5bf9\u8c61（Object）\u5b57\u9762\u91cf\u00a0\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61：<\/p>\n

{firstName:"John", lastName:"Doe", age:50, eyeColor:"blue"}<\/p>\n

\u51fd\u6570（Function）\u5b57\u9762\u91cf\u00a0\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570：<\/p>\n

function myFunction(a, b) { return a * b;}<\/p>\n<\/p>\n

\n

JavaScript \u53d8\u91cf<\/h3>\n

\u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d，\u53d8\u91cf\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u503c\u3002<\/p>\n

JavaScript \u4f7f\u7528\u5173\u952e\u5b57\u00a0var\u00a0\u6765\u5b9a\u4e49\u53d8\u91cf， \u4f7f\u7528\u7b49\u53f7\u6765\u4e3a\u53d8\u91cf\u8d4b\u503c：<\/p>\n

var x, length x = 5 length = 6<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

\u53d8\u91cf\u53ef\u4ee5\u901a\u8fc7\u53d8\u91cf\u540d\u8bbf\u95ee\u3002\u5728\u6307\u4ee4\u5f0f\u8bed\u8a00\u4e2d，\u53d8\u91cf\u901a\u5e38\u662f\u53ef\u53d8\u7684\u3002\u5b57\u9762\u91cf\u662f\u4e00\u4e2a\u6052\u5b9a\u7684\u503c\u3002<\/p>\n<\/p>\n\n\n\n

\"Note\"<\/p>\n

\u53d8\u91cf\u662f\u4e00\u4e2a\u540d\u79f0\u3002\u5b57\u9762\u91cf\u662f\u4e00\u4e2a\u503c\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

JavaScript \u64cd\u4f5c\u7b26<\/h3>\n

JavaScript\u4f7f\u7528\u00a0\u7b97\u672f\u8fd0\u7b97\u7b26\u00a0\u6765\u8ba1\u7b97\u503c:<\/p>\n

(5 + 6) * 10<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

JavaScript\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\u7ed9\u53d8\u91cf\u8d4b\u503c：<\/p>\n

x = 5 y = 6 z = (x + y) * 10<\/p>\n

\u5c1d\u8bd5\u4e00\u4e0b \u00bb<\/p>\n

JavaScript\u8bed\u8a00\u6709\u591a\u79cd\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26：<\/p>\n\n\n\u7c7b\u578b\u5b9e\u4f8b\u63cf\u8ff0<\/tr>\n\n\n
\u8d4b\u503c，\u7b97\u672f\u548c\u4f4d\u8fd0\u7b97\u7b26<\/td>\n=\u00a0 +\u00a0 –\u00a0 *\u00a0 \/<\/td>\n\u5728 JS \u8fd0\u7b97\u7b26\u4e2d\u63cf\u8ff0<\/td>\n<\/tr>\n
\u6761\u4ef6，\u6bd4\u8f83\u53ca\u903b\u8f91\u8fd0\u7b97\u7b26<\/td>\n==\u00a0 != <\u00a0 >\u00a0<\/td>\n\u5728 JS \u6bd4\u8f83\u8fd0\u7b97\u7b26\u4e2d\u63cf\u8ff0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

JavaScript \u8bed\u53e5<\/h3>\n

\u5728 HTML \u4e2d，JavaScript \u8bed\u53e5\u7528\u4e8e\u5411\u6d4f\u89c8\u5668\u53d1\u51fa\u547d\u4ee4\u3002<\/p>\n

\u8bed\u53e5\u662f\u7528\u5206\u53f7\u5206\u9694：<\/p>\n

x = 5 + 6; y = x * 10;<\/p>\n<\/p>\n

\n

JavaScript \u5173\u952e\u5b57<\/h3>\n

JavaScript \u5173\u952e\u5b57\u7528\u4e8e\u6807\u8bc6\u8981\u6267\u884c\u7684\u64cd\u4f5c\u3002<\/p>\n

\u548c\u5176\u4ed6\u4efb\u4f55\u7f16\u7a0b\u8bed\u8a00\u4e00\u6837，JavaScript \u4fdd\u7559\u4e86\u4e00\u4e9b\u5173\u952e\u5b57\u4e3a\u81ea\u5df1\u6240\u7528\u3002<\/p>\n

var\u00a0\u5173\u952e\u5b57\u544a\u8bc9\u6d4f\u89c8\u5668\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u53d8\u91cf：<\/p>\n

var x = 5 + 6; var y = x * 10;<\/p>\n

JavaScript \u540c\u6837\u4fdd\u7559\u4e86\u4e00\u4e9b\u5173\u952e\u5b57，\u8fd9\u4e9b\u5173\u952e\u5b57\u5728\u5f53\u524d\u7684\u8bed\u8a00\u7248\u672c\u4e2d\u5e76\u6ca1\u6709\u4f7f\u7528，\u4f46\u5728\u4ee5\u540e JavaScript \u6269\u5c55\u4e2d\u4f1a\u7528\u5230\u3002<\/p>\n

\u4ee5\u4e0b\u662f JavaScript \u4e2d\u6700\u200b\u200b\u91cd\u8981\u7684\u4fdd\u7559\u5173\u952e\u5b57（\u6309\u5b57\u6bcd\u987a\u5e8f）：<\/p>\n\n\n\n<\/tr>\n\n<\/tr>\n\n<\/tr>\n\n<\/tr>\n\n<\/tr>\n\n
abstract<\/td>\nelse<\/td>\ninstanceof<\/td>\nsuper<\/td>\n<\/tr>\n
boolean<\/td>\nenum<\/td>\nint<\/td>\nswitch<\/td>\n<\/tr>\n
break<\/td>\nexport<\/td>\ninterface<\/td>\nsynchronized<\/td>\n<\/tr>\n
byte<\/td>\nextends<\/td>\nlet<\/td>\nthis<\/td>\n<\/tr>\n
case<\/td>\nfalse<\/td>\nlong<\/td>\nthrow<\/td>\n<\/tr>\n
catch<\/td>\nfinal<\/td>\nnative<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

JavaScript\u00a0\u8bed\u6cd5 JavaScript \u662f\u4e00\u4e2a\u7a0b\u5e8f\u8bed\u8a00\u3002\u8bed\u6cd5\u89c4\u5219\u5b9a\u4e49\u4e86\u8bed\u8a00\u7ed3\u6784\u3002 JavaScript \u8bed\u6cd5
\nJavaScript \u662f\u4e00\u4e2a\u811a\u672c\u8bed\u8a00\u3002
\n\u5b83\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7，\u4f46\u529f\u80fd\u5f3a\u5927\u7684\u7f16\u7a0b\u8bed\u8a00\u3002 JavaScript \u5b57\u9762\u91cf
\n\u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d，\u4e00\u822c\u56fa\u5b9a\u503c\u79f0\u4e3a\u5b57\u9762\u91cf，\u5982 3.14\u3002
\n\u6570\u5b57（Number）\u5b57\u9762\u91cf\u00a0\u53ef\u4ee5\u662f\u6574\u6570\u6216\u8005\u662f\u5c0f\u6570，\u6216\u8005\u662f\u79d1\u5b66\u8ba1\u6570(e)\u3002
\n3.14 1001 http<\/p>\n","protected":false},"author":2,"featured_media":78030,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[722,187,190],"topic":[],"class_list":["post-78031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-ecmascript","tag-javascript","tag-190"],"yoast_head":"\nJavaScript \u5b57\u9762\u91cf77788 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/78031.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript \u5b57\u9762\u91cf77788 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"JavaScript\u00a0\u8bed\u6cd5 JavaScript \u662f\u4e00\u4e2a\u7a0b\u5e8f\u8bed\u8a00\u3002\u8bed\u6cd5\u89c4\u5219\u5b9a\u4e49\u4e86\u8bed\u8a00\u7ed3\u6784\u3002 JavaScript \u8bed\u6cd5 JavaScript \u662f\u4e00\u4e2a\u811a\u672c\u8bed\u8a00\u3002 \u5b83\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7，\u4f46\u529f\u80fd\u5f3a\u5927\u7684\u7f16\u7a0b\u8bed\u8a00\u3002 JavaScript \u5b57\u9762\u91cf \u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d，\u4e00\u822c\u56fa\u5b9a\u503c\u79f0\u4e3a\u5b57\u9762\u91cf，\u5982 3.14\u3002 \u6570\u5b57（Number）\u5b57\u9762\u91cf\u00a0\u53ef\u4ee5\u662f\u6574\u6570\u6216\u8005\u662f\u5c0f\u6570，\u6216\u8005\u662f\u79d1\u5b66\u8ba1\u6570(e)\u3002 3.14 1001 http\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/78031.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-25T15:05:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260225150544-699f0fc87719b.jpg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/78031.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/78031.html\",\"name\":\"JavaScript \u5b57\u9762\u91cf77788 - 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