{"id":32020,"date":"2023-09-13T10:07:11","date_gmt":"2023-01-17T10:26:16","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/node-js-%e7%94%b1%e4%ba%8e%e8%af%a5%e5%af%b9%e8%b1%a1%e4%b8%8d%e5%a4%9f%e5%8f%af%e9%9d%a0%ef%bc%8c%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8bind%e5%87%bd%e6%95%b0%e8%bf%9b%e8%a1%8c%e7%bb%91%e5%ae%9a\/"},"modified":"2024-05-03T23:32:52","modified_gmt":"2024-05-03T15:32:52","slug":"node-js-%e7%94%b1%e4%ba%8e%e8%af%a5%e5%af%b9%e8%b1%a1%e4%b8%8d%e5%a4%9f%e5%8f%af%e9%9d%a0%ef%bc%8c%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8bind%e5%87%bd%e6%95%b0%e8%bf%9b%e8%a1%8c%e7%bb%91%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/node-js-%e7%94%b1%e4%ba%8e%e8%af%a5%e5%af%b9%e8%b1%a1%e4%b8%8d%e5%a4%9f%e5%8f%af%e9%9d%a0%ef%bc%8c%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8bind%e5%87%bd%e6%95%b0%e8%bf%9b%e8%a1%8c%e7%bb%91%e5%ae%9a\/","title":{"rendered":"[Node.js] \u7531\u4e8e\u8be5\u5bf9\u8c61\u4e0d\u591f\u53ef\u9760\uff0c\u9700\u8981\u4f7f\u7528bind\u51fd\u6570\u8fdb\u884c\u7ed1\u5b9a"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u597d\u4e45\u4e0d\u89c1\u4e86\uff0c\u6211\u8981\u5199\u4e00\u7bc7\u6587\u7ae0\u4e86\u3002\u6211\u662fPirikara\u3002
\n\u6700\u8fd1\u6211\u51e0\u4e4e\u53ea\u5199JavaScript\uff0c\u4f46\u6211\u60f3\u5728\u5de5\u4f5c\u4e2d\u5206\u4eab\u4e00\u4e2a\u6211\u89e3\u51b3\u7684\u95ee\u9898\u3002<\/p>\n

\u8fd9<\/h1>\n

\u8fd9\u91cc\u4ecb\u7ecd\u4e86\u5173\u4e8ethis\u7684\u884c\u4e3a\u5dee\u5f02\u3002<\/p>\n

\u9019\u500b\u300cthis\u300d\u5728\u67d0\u4e9b\u5730\u65b9\u88ab\u547c\u53eb\u6642\u6703\u6539\u8b8a\u503c\u3002
\n\u4ee5\u524d\u6211\u4e26\u6c92\u6709\u7279\u5225\u6ce8\u610f\u5230\uff0c\u4f46\u56e0\u70ba\u9019\u500b\u300cthis\u300d\u7684\u53c3\u8003\u5c0d\u8c61\u8b8a\u4e86\uff0c\u5c0e\u81f4\u6211\u6709\u9ede\u56f0\u64fe\u3002<\/p>\n

\u5728\u6d4b\u8bd5Jest\u4e2d\u5904\u7406”this”\u7684\u4ee3\u7801\u65f6\u9047\u5230\u4e86\u56f0\u96be\u3002<\/h1>\n

\u8fd9\u4e2amixin\u662f\u5c06\u7528\u4f5cVue.js\u7ec4\u4ef6\u65b9\u6cd5\u7684\u51fd\u6570\u96c6\u5408\u5728\u4e00\u8d77\u3002
\n\u540e\u7aef\uff08Ruby on Rails\uff09\u7684\u4ee3\u7801\u901a\u8fc7\u81ea\u52a8\u6d4b\u8bd5\u6765\u786e\u4fdd\u8d28\u91cf\uff0c\u4f46\u5bf9\u4e8e\u524d\u7aef\u7684js\u6587\u4ef6\uff0c\u6211\u4eec\u8fdb\u884c\u4e86E2E\u6d4b\u8bd5\u3002
\n\u7531\u4e8e\u4ec5\u8fdb\u884cE2E\u6d4b\u8bd5\u53ef\u80fd\u4f1a\u6f0f\u6389\u4e00\u4e9b\u95ee\u9898\uff0c\u6240\u4ee5\u6211\u4eec\u51b3\u5b9a\u9010\u6b65\u5f15\u5165\u524d\u7aef\u7684\u81ea\u52a8\u5316\u6d4b\u8bd5\u3002<\/p>\n

\u6240\u4ee5\uff0c\u6211\u6700\u521d\u662f\u5e0c\u671b\u5148\u6d4b\u8bd5JS\u6587\u4ef6\u800c\u4e0d\u662f\u7ec4\u4ef6\u7684……\u8fd9\u6837\u60f3\u7740\u7684……<\/p>\n

\r\nexport<\/span> function<\/span> A<\/span>(<\/span>hoge<\/span>)<\/span> {<\/span>\r\n  return<\/span> this<\/span>.<\/span>B<\/span>(<\/span>this<\/span>.<\/span>$store<\/span>.<\/span>hogehoge<\/span>,<\/span> hoge<\/span>)<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> function<\/span> B<\/span>(<\/span>a<\/span>,<\/span> b<\/span>)<\/span> {<\/span>\r\n  return<\/span> a<\/span>*<\/span>b<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\r\nimport<\/span> *<\/span> as<\/span> mixin<\/span> from<\/span> '<\/span>path\/to\/mixin.js<\/span>'<\/span>;<\/span>\r\nit<\/span>(<\/span>'<\/span>A\u95a2\u6570\u306b10\u3092\u6e21\u3059\u3068\u300150\u3092\u8fd4\u3059<\/span>'<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  expect<\/span>(<\/span>mixin<\/span>.<\/span>A<\/span>(<\/span>10<\/span>)).<\/span>toEqual<\/span>(<\/span>50<\/span>);<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u5728A\u51fd\u6570\u4e2d\uff0c\u4f7f\u7528\u4e86this\u5173\u952e\u5b57\u3002
\nmixin\u7684\u4ee3\u7801\u4f1a\u88ab\u4f5c\u4e3a\u7ec4\u4ef6\u5185\u7684methods\u65b9\u6cd5\u52a0\u8f7d\uff0c\u6240\u4ee5\u8fd9\u91cc\u7684this\u6307\u7684\u662f\u7ec4\u4ef6\u672c\u8eab\u3002
\n\u7136\u800c\uff0c\u5f53\u6267\u884c\u8fd9\u4e2a\u6d4b\u8bd5\u65f6\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\n
TypeError:Cannot read property 'hogehoge' of undefined.\r\n<\/span><\/code><\/pre>\n
\u5728\u6d4b\u8bd5\u73af\u5883\u4e0b\u6267\u884c\u65f6\uff0c\u5c1d\u8bd5\u901a\u8fc7this.$store\u5f15\u7528Vuex\u7684store\u3002\u4f46\u662f\uff0c\u8fd9\u91cc\u7684this\u6307\u7684\u662fmixin\u81ea\u8eab\uff0c\u5e76\u4e14\u6ca1\u6709\u540d\u4e3a$store\u7684\u503c\uff0c\u56e0\u6b64\u4f1a\u53d8\u4e3aundefined\u3002\u7531\u4e8e\u5b83\u4e5f\u6ca1\u6709\u540d\u4e3ahogehoge\u7684\u503c\uff0c\u6240\u4ee5\u4f1a\u5bfc\u81f4\u8be5\u9519\u8bef\u3002<\/p>\n
\u4ee5\u73b0\u5728\u8fd9\u4e2a\u72b6\u6001\uff0c\u8fd9\u4e2a\u4e8b\u60c5\u5f71\u54cd\u7740\u6211\u65e0\u6cd5\u53c2\u52a0\u6d4b\u8bd5\u3002<\/p>\n
\u7528bind\u547d\u4ee4\u8fdb\u884c\u7ed1\u5b9a<\/h1>\n
\u5728JavaScript\u7684\u51fd\u6570\u5bf9\u8c61\u4e2d\uff0c\u6709\u4e00\u4e2a\u65b9\u4fbf\u7684\u65b9\u6cd5\u53eb\u505abind\u3002<\/p>\n
\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5c06\u51fd\u6570\u5185\u7684”this”\u503c\u56fa\u5b9a\u4e3a\u6307\u5b9a\u503c\u7684\u65b0\u51fd\u6570\u3002\u8ba9\u6211\u4eec\u7acb\u523b\u5c1d\u8bd5\u4f7f\u7528\u5b83\u3002<\/p>\n
import<\/span> *<\/span> as<\/span> mixin<\/span> from<\/span> '<\/span>path\/to\/mixin.js<\/span>'<\/span>;<\/span>\r\nit<\/span>(<\/span>'<\/span>A\u95a2\u6570\u306b10\u3092\u6e21\u3059\u3068\u300150\u3092\u8fd4\u3059<\/span>'<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> mockTest<\/span> =<\/span> mixin<\/span>.<\/span>A<\/span>.<\/span>bind<\/span>(<\/span>5<\/span>,<\/span> 10<\/span>)<\/span> \/\/ \u7b2c\u4e00\u5f15\u6570\u304c\u95a2\u6570\u5185\u306ethis\u306e\u5024\u306b\u306a\u308b<\/span>\r\n  expect<\/span>(<\/span>mockTest<\/span>()).<\/span>toEqual<\/span>(<\/span>50<\/span>);<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u73b0\u5728\u6211\u53ef\u4ee5\u6b63\u786e\u5730\u6267\u884c\u6d4b\u8bd5\u4e86\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\u4f60\u76f4\u63a5\u6d4b\u8bd5\u4ee5\u8fd9\u79cd\u65b9\u5f0f\u7ed1\u5b9a\u7684\u51fd\u6570\uff0c\u539f\u51fd\u6570\u4f1a\u88ab\u76f4\u63a5\u6267\u884c\uff08\u65e0\u6cd5\u56fa\u5b9athis\uff09\uff0c\u6240\u4ee5\u8981\u6ce8\u610f\u3002<\/p>\n
import<\/span> *<\/span> as<\/span> mixin<\/span> from<\/span> '<\/span>path\/to\/mixin.js<\/span>'<\/span>;<\/span>\r\nit<\/span>(<\/span>'<\/span>A\u95a2\u6570\u306b10\u3092\u6e21\u3059\u3068\u300150\u3092\u8fd4\u3059<\/span>'<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  expect<\/span>(<\/span>mixin<\/span>.<\/span>A<\/span>.<\/span>bind<\/span>(<\/span>5<\/span>,<\/span> 10<\/span>)).<\/span>toEqual<\/span>(<\/span>50<\/span>);<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u7d50\u675f<\/h1>\n
\u5982\u679c\u8fd8\u6709\u7d20\u6750\uff0c\u6211\u4f1a\u518d\u5199\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u597d\u4e45\u4e0d\u89c1\u4e86\uff0c\u6211\u8981\u5199\u4e00\u7bc7\u6587\u7ae0\u4e86\u3002\u6211\u662fPirikara\u3002 \u6700\u8fd1\u6211\u51e0\u4e4e\u53ea\u5199JavaScript\uff0c\u4f46\u6211\u60f3\u5728\u5de5\u4f5c\u4e2d […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-32020","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n[Node.js] \u7531\u4e8e\u8be5\u5bf9\u8c61\u4e0d\u591f\u53ef\u9760\uff0c\u9700\u8981\u4f7f\u7528bind\u51fd\u6570\u8fdb\u884c\u7ed1\u5b9a - Blog - Silicon Cloud<\/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.silicloud.com\/zh\/blog\/node-js-\u7531\u4e8e\u8be5\u5bf9\u8c61\u4e0d\u591f\u53ef\u9760\uff0c\u9700\u8981\u4f7f\u7528bind\u51fd\u6570\u8fdb\u884c\u7ed1\u5b9a\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Node.js] \u7531\u4e8e\u8be5\u5bf9\u8c61\u4e0d\u591f\u53ef\u9760\uff0c\u9700\u8981\u4f7f\u7528bind\u51fd\u6570\u8fdb\u884c\u7ed1\u5b9a\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u597d\u4e45\u4e0d\u89c1\u4e86\uff0c\u6211\u8981\u5199\u4e00\u7bc7\u6587\u7ae0\u4e86\u3002\u6211\u662fPirikara\u3002 \u6700\u8fd1\u6211\u51e0\u4e4e\u53ea\u5199JavaScript\uff0c\u4f46\u6211\u60f3\u5728\u5de5\u4f5c\u4e2d […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/node-js-\u7531\u4e8e\u8be5\u5bf9\u8c61\u4e0d\u591f\u53ef\u9760\uff0c\u9700\u8981\u4f7f\u7528bind\u51fd\u6570\u8fdb\u884c\u7ed1\u5b9a\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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