{"id":6250,"date":"2025-06-03T14:15:10","date_gmt":"2025-06-04T06:36:09","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=6250"},"modified":"2025-06-04T14:15:10","modified_gmt":"2025-06-04T06:36:09","slug":"%e4%ba%86%e8%a7%a3node-js%e4%b8%ad%e7%9a%84%e4%ba%8b%e4%bb%b6%e8%99%95%e7%90%86%e5%99%a8%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/node-js\/%e4%ba%86%e8%a7%a3node-js%e4%b8%ad%e7%9a%84%e4%ba%8b%e4%bb%b6%e8%99%95%e7%90%86%e5%99%a8%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Node.js \u4e8b\u4ef6\u8655\u7406\u5668\uff1a2025 \u6700\u65b0\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

Node.js \u4e2d\u5982\u4f55\u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\uff1f<\/h1>\n

Node.js \u662f\u4e00\u500b\u5efa\u7acb\u5728 JavaScript \u8a9e\u8a00\u57fa\u790e\u4e0a\u7684\u958b\u6e90\u3001\u8de8\u5e73\u53f0\u7684 JavaScript \u74b0\u5883\uff0c\u9069\u5408\u7528\u65bc\u958b\u767c\u670d\u52d9\u5668\u7aef\u61c9\u7528\u7a0b\u5e8f\u3002Node.js \u63a1\u7528\u4e8b\u4ef6\u9a45\u52d5\u3001\u975e\u963b\u585e I\/O \u6a21\u578b\uff0c\u4f7f\u5176\u8f15\u91cf\u53c8\u9ad8\u6548\u3002\u5728 Node.js \u4e2d\uff0c\u4e8b\u4ef6\u8655\u7406\u5668\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6280\u8853\uff0c\u5b83\u4f7f\u958b\u767c\u8005\u80fd\u5920\u66f4\u6709\u6548\u5730\u69cb\u5efa\u670d\u52d9\u5668\u7aef\u61c9\u7528\u7a0b\u5e8f\uff0c\u4e26\u4e14\u66f4\u9ad8\u6548\u5730\u8655\u7406 I\/O \u64cd\u4f5c\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u4e8b\u4ef6\u8655\u7406\u5668\uff1f<\/h2>\n

\u4e8b\u4ef6\u8655\u7406\u5668\uff08Event Handler\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u8655\u7406\u4e8b\u4ef6\u7684\u51fd\u6578\u6216\u65b9\u6cd5\u3002\u5728 Node.js \u4e2d\uff0c\u4e8b\u4ef6\u8655\u7406\u5668\u7684\u6838\u5fc3\u662f `EventEmitter` \u985e\uff0c\u9019\u500b\u985e\u5225\u4f7f\u5f97\u61c9\u7528\u7a0b\u5e8f\u80fd\u5920\u8a3b\u518a\u4e8b\u4ef6\u4ee5\u53ca\u5c0d\u4e8b\u4ef6\u767c\u51fa\u53cd\u61c9\u3002\u9019\u7a2e\u6280\u8853\u8b93\u958b\u767c\u8005\u80fd\u5920\u8a2d\u8a08\u51fa\u53cd\u61c9\u8fc5\u901f\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf I\/O \u64cd\u4f5c\u6642\u3002<\/p>\n

\u5982\u4f55\u5728 Node.js \u4e2d\u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\uff1f<\/h2>\n

\u5728 Node.js \u4e2d\u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u6b65\u9a5f\uff1a<\/p>\n

1. \u5f15\u5165 `events` \u6a21\u7d44\u3002
\n2. \u5275\u5efa\u4e00\u500b\u65b0\u7684 `EventEmitter` \u5be6\u4f8b\u3002
\n3. \u4f7f\u7528 `on()` \u65b9\u6cd5\u4f86\u8a3b\u518a\u4e8b\u4ef6\u8655\u7406\u5668\u3002
\n4. \u4f7f\u7528 `emit()` \u65b9\u6cd5\u4f86\u89f8\u767c\u4e8b\u4ef6\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u790e\u7bc4\u4f8b\uff1a<\/p>\n

“`javascript
\nconst EventEmitter = require(‘events’);<\/p>\n

\/\/ \u5275\u5efa\u4e00\u500b\u65b0\u7684\u4e8b\u4ef6\u8655\u7406\u5668\u5c0d\u8c61
\nconst myEmitter = new EventEmitter();<\/p>\n

\/\/ \u8a3b\u518a\u4e8b\u4ef6\u8655\u7406\u5668
\nmyEmitter.on(‘someEvent’, (data) => {
\n console.log(data);
\n});<\/p>\n

\/\/ \u89f8\u767c\u4e8b\u4ef6
\nmyEmitter.emit(‘someEvent’, ‘Hello World!’);
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u65b0\u7684\u4e8b\u4ef6\u8655\u7406\u5668\u5c0d\u8c61 `myEmitter`\uff0c\u7136\u5f8c\u8a3b\u518a\u4e86\u4e00\u500b\u540d\u70ba `someEvent` \u7684\u4e8b\u4ef6\u8655\u7406\u5668\uff0c\u6700\u5f8c\u89f8\u767c\u8a72\u4e8b\u4ef6\uff0c\u4e26\u50b3\u905e\u4e86\u4e00\u500b\u5b57\u7b26\u4e32 `’Hello World!’` \u4f5c\u70ba\u53c3\u6578\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664\u8207\u5e38\u898b\u554f\u984c<\/h2>\n

\u5728\u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u932f\u8aa4\uff0c\u4f8b\u5982\u4e8b\u4ef6\u672a\u6b63\u78ba\u8a3b\u518a\u6216\u672a\u89f8\u767c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u932f\u8aa4\u6392\u9664\u7684\u6280\u5de7\uff1a<\/p>\n

– **\u4e8b\u4ef6\u672a\u89f8\u767c**\uff1a\u78ba\u4fdd\u5728\u8abf\u7528 `emit()` \u65b9\u6cd5\u524d\u5df2\u7d93\u4f7f\u7528 `on()` \u65b9\u6cd5\u8a3b\u518a\u4e86\u4e8b\u4ef6\u8655\u7406\u5668\u3002
\n– **\u4e8b\u4ef6\u8655\u7406\u5668\u672a\u57f7\u884c**\uff1a\u6aa2\u67e5\u4e8b\u4ef6\u540d\u7a31\u662f\u5426\u4e00\u81f4\uff0c\u4e26\u78ba\u4fdd `emit()` \u65b9\u6cd5\u7684\u53c3\u6578\u6b63\u78ba\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

\u4e8b\u4ef6\u8655\u7406\u5668\u4e0d\u50c5\u9650\u65bc\u57fa\u790e\u7684\u4e8b\u4ef6\u76e3\u807d\u3002\u60a8\u53ef\u4ee5\u64f4\u5c55\u6b64\u6982\u5ff5\uff0c\u5c07\u5176\u61c9\u7528\u65bc\u66f4\u8907\u96dc\u7684\u5834\u666f\uff0c\u4f8b\u5982\uff1a<\/p>\n

– **\u7570\u6b65\u64cd\u4f5c\u7684\u7ba1\u7406**\uff1a\u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\u8655\u7406\u591a\u500b\u7570\u6b65\u64cd\u4f5c\u7684\u5b8c\u6210\u4e8b\u4ef6\u3002
\n– **\u81ea\u8a02\u4e8b\u4ef6**\uff1a\u5728\u61c9\u7528\u7a0b\u5f0f\u4e2d\u5275\u5efa\u548c\u8655\u7406\u81ea\u5b9a\u7fa9\u4e8b\u4ef6\uff0c\u4ee5\u6eff\u8db3\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n

\u6b64\u5916\uff0c\u5982\u679c\u60a8\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc Python \u7684\u4e8b\u4ef6\u8655\u7406\u6280\u8853\uff0c\u8acb\u53c3\u8003 [\u9019\u7bc7\u6559\u5b78](https:\/\/vocus.cc\/article\/605a2e6cfd897800011a7bac)\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

\u5728 Node.js \u4e2d\uff0c\u4e8b\u4ef6\u8655\u7406\u5668\u662f\u69cb\u5efa\u9ad8\u6548\u670d\u52d9\u5668\u7aef\u61c9\u7528\u7a0b\u5e8f\u7684\u95dc\u9375\u6280\u8853\u3002\u901a\u904e\u4f7f\u7528 `EventEmitter` \u985e\u5225\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u8a3b\u518a\u548c\u89f8\u767c\u4e8b\u4ef6\uff0c\u5f9e\u800c\u4f7f\u61c9\u7528\u7a0b\u5e8f\u66f4\u52a0\u97ff\u61c9\u8fc5\u901f\u3002<\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1: \u4e8b\u4ef6\u8655\u7406\u5668\u7684\u6027\u80fd\u5982\u4f55\uff1f**
\nA1: \u4f7f\u7528\u4e8b\u4ef6\u8655\u7406\u5668\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406 I\/O \u64cd\u4f5c\uff0c\u589e\u52a0\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n

**Q2: \u5982\u4f55\u5728 Node.js \u4e2d\u7ba1\u7406\u591a\u500b\u4e8b\u4ef6\uff1f**
\nA2: \u60a8\u53ef\u4ee5\u70ba\u6bcf\u500b\u4e8b\u4ef6\u8a3b\u518a\u4e0d\u540c\u7684\u8655\u7406\u5668\uff0c\u4e26\u5728\u5fc5\u8981\u6642\u89f8\u767c\u5b83\u5011\uff0c\u9019\u6a23\u53ef\u4ee5\u9748\u6d3b\u7ba1\u7406\u591a\u500b\u4e8b\u4ef6\u7684\u97ff\u61c9\u3002<\/p>\n

\u884c\u52d5\u547c\u7c72<\/h2>\n

\u5982\u679c\u60a8\u5c0d Node.js \u6216\u5176\u4ed6\u7a0b\u5f0f\u8a9e\u8a00\u7684\u5b78\u7fd2\u611f\u5230\u8208\u8da3\uff0c\u8acb\u8a3b\u518a\u6211\u5011\u7684\u96fb\u5b50\u5831\u4ee5\u7372\u53d6\u6700\u65b0\u7684\u6559\u5b78\u8cc7\u6e90\u548c\u6280\u5de7\u3002\u9ede\u64ca [\u9019\u88e1](https:\/\/vocus.cc\/article\/605a2e6cfd897800011a7bac) \u4e86\u89e3\u66f4\u591a\uff0c\u8b93\u6211\u5011\u4e00\u8d77\u63d0\u5347\u60a8\u7684\u7a0b\u5f0f\u8a2d\u8a08\u6280\u80fd\u5427\uff01<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6458\u8981(Description):\u4e86\u89e3Node.js\u4e2d\u7684\u4e8b\u4ef6\u8655\u7406\u5668\u529f\u80fd\uff0c\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Node.js\u4e2d\u7684\u4e8b\u4ef6\u8655\u7406\u5668\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528\u5b83\u4f86\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[193,192],"tags":[191,190],"class_list":["post-6250","post","type-post","status-publish","format-standard","hentry","category-node","category-node-js","tag-node","tag-node-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1CO","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=6250"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6250\/revisions"}],"predecessor-version":[{"id":6251,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/6250\/revisions\/6251"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=6250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=6250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=6250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}