{"id":10008302,"date":"2023-09-20T20:38:39","date_gmt":"2023-09-20T12:38:39","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008302"},"modified":"2023-09-20T20:38:39","modified_gmt":"2023-09-20T12:38:39","slug":"node-js-20-%e5%87%a0%e4%b8%aa%e4%bb%a4%e4%ba%ba%e5%a4%a7%e5%bc%80%e7%9c%bc%e7%95%8c%e7%9a%84%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008302","title":{"rendered":"Node.js 20 \u2014\u2014 \u51e0\u4e2a\u4ee4\u4eba\u5927\u5f00\u773c\u754c\u7684\u7279\u6027"},"content":{"rendered":"

\u524d\u8a00\uff1a\u6b22\u8fce\u6765\u5230 Node.js 20<\/strong><\/p>\n

Node.js 20 \u5df2\u7ecf\u53d1\u5e03\uff0c\u5e26\u6765\u4e86\u521b\u65b0\u548c\u6fc0\u52a8\u4eba\u5fc3\u7684\u65b0\u65f6\u4ee3\u3002\u8fd9\u4e2a\u5f00\u521b\u6027\u7684\u7248\u672c\u4e8e2023\u5e744\u670818\u65e5\u9996\u6b21\u4eae\u76f8\uff0c\u5e76\u5c06\u57282023\u5e7410\u6708\u53d1\u5e03\u957f\u671f\u652f\u6301\uff08LTS\uff09\u7248\u672c\uff0c\u5e76\u4e14\u5c06\u6301\u7eed\u652f\u6301\u81f32026\u5e744\u6708\uff0c\u4e0b\u9762\u5c0f\u7f16\u5c31\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u4e00\u4e0bNode.js20\u7684\u51e0\u4e2a\u65b0\u7279\u6027\uff1a<\/p>\n

1.Node.js \u6743\u9650\u8bbf\u95ee<\/strong><\/p>\n

Node.js 20 \u6b63\u5f0f\u63a8\u51fa\u4e86\u6743\u9650\u6a21\u578b\uff0c\u8fd9\u662f Rafael Gonzaga \u63d0\u4f9b\u7684\u4e00\u9879\u5b9e\u9a8c\u6027\u529f\u80fd\uff0c\u53ef\u4ee5\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u9650\u5236\u5bf9\u7279\u5b9a\u8d44\u6e90\u7684\u8bbf\u95ee\u3002<\/p>\n

\u8981\u4f7f\u7528\u8fd9\u4e2a\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u53ea\u9700\u542f\u7528 –experimental-permission \u6807\u5fd7\uff0c\u4f8b\u5982\uff1a<\/p>\n

node --experimental-permissions myApp.js<\/code><\/pre>\n
\u8fd9\u5c06\u9650\u5236\u6240\u6709\u53ef\u7528\u6743\u9650\u7684\u8bbf\u95ee\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u8fdc\u79bb\u4efb\u4f55\u4e0d\u53d7\u6b22\u8fce\u7684\u5165\u4fb5\u8005\u3002<\/p>\n
\u6587\u4ef6\u8bfb\u5199\u7cfb\u7edf<\/strong><\/p>\n
\u8981\u5141\u8bb8\u8bbf\u95ee\u6587\u4ef6\u7cfb\u7edf\uff0c\u8bf7\u4f7f\u7528–allow-fs-read\u548c –allow-fs-write\u6807\u5fd7\uff1a<\/p>\n
$ node --experimental-permission --allow-fs-read=* --allow-fs-write=* index.js\n Hello world!\n (node:19836) ExperimentalWarning: Permission is an experimental feature\n (Use `node --trace-warnings ...` to show where the warning was created)<\/code><\/pre>\n
\u4e0b\u9762\u662f\u5177\u4f53\u6307\u4ee4\u7684\u542b\u4e49\uff1a<\/p>\n
    \n
  • –allow-fs-read=*- \u5b83\u5c06\u5141\u8bb8\u6240\u6709FileSystemRead\u64cd\u4f5c\u3002<\/li>\n
  • –allow-fs-write=*- \u5b83\u5c06\u5141\u8bb8\u6240\u6709FileSystemWrite\u64cd\u4f5c\u3002<\/li>\n
  • –allow-fs-write=\/tmp\/- \u5b83\u5c06\u5141\u8bb8FileSystemWrite\u8bbf\u95ee\u8be5\/tmp\/ \u6587\u4ef6\u5939\u3002<\/li>\n
  • –allow-fs-read=\/tmp\/,\/home\/.gitignore- \u5b83\u5141\u8bb8FileSystemRead\u8bbf\u95ee\/tmp\/\u6587\u4ef6\u5939\u548c<\/strong>\u8def\u5f84\/home\/.gitignore\u3002<\/li>\n<\/ul>\n
    2.\u81ea\u5b9a\u4e49 ESM \u52a0\u8f7d\u5668\u94a9\u5b50<\/strong><\/p>\n
    Node.js 20\u901a\u8fc7\u52a0\u8f7d\u5668\u63d0\u4f9b\u7684\u81ea\u5b9a\u4e49\u94a9\u5b50<\/p>\n
    (–experimental-loader=.\/mr.mjs)\u5728\u4e13\u7528\u7ebf\u7a0b\u4e0a\u8fd0\u884c\uff0c\u786e\u4fdd\u4e00\u5207\u90fd\u4fdd\u6301\u4e95\u7136\u6709\u5e8f\u3002<\/p>\n
    \u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u81ea\u5b9a\u4e49\u52a0\u8f7d\u5668\u7684\u5feb\u901f\u793a\u4f8b\uff1a<\/p>\n
    loading.mjs<\/p>\n
    export async function resolve(specifier, parentModuleURL, defaultResolve) {\n  console.log("Resolving:", specifier);\n  return defaultResolve(specifier, parentModuleURL);\n }<\/code><\/pre>\n
    export async function load(url, defaultLoad) {\n  console.log("Loading:", url);\n  return defaultLoad(url);\n }<\/code><\/pre>\n
    index.js<\/p>\n
    console.log("Hello, Node.js 20!");<\/code><\/pre>\n
    cmd<\/p>\n
    node --experimental-loader=.\/loader.mjs main.js<\/code><\/pre>\n
    \u8fd9\u4e2a\u81ea\u5b9a\u4e49\u52a0\u8f7d\u5668\u5c06\u8bb0\u5f55\u6bcf\u4e2a\u6a21\u5757\u7684\u89e3\u6790\u548c\u52a0\u8f7d\u8fc7\u7a0b\u3002<\/p>\n
    3.\u540c\u6b65\u7684 import.meta.resolve()<\/strong><\/p>\n
    \u4e3a\u4e86\u8ddf\u4e0a\u6d4f\u89c8\u5668\u884c\u4e3a\uff0c\u73b0\u5728 import.meta.resolve \u51fd\u6570\u8fd4\u56de\u540c\u6b65\u3002\u4f46\u4ecd\u53ef\u4ee5\u6839\u636e\u9700\u8981\u81ea\u5b9a\u5b9a\u4e49\u52a0\u8f7d\u5668\u89e3\u6790\u94a9\u5b50\u4e3a\u5f02\u6b65\u6216\u540c\u6b65\u51fd\u6570\u3002<\/p>\n
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u5feb\u901f\u793a\u4f8b\uff0c\u5c55\u793a\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1a<\/p>\n
    module.mjs<\/p>\n
    (async () => {\n  const resolvedURL = import.meta.resolve('.\/otherModule.mjs');\n  console.log("Resolved URL:", resolvedURL);<\/code><\/pre>\n
    const asyncResolvedURL = await import.meta.resolve('.\/otherModule.mjs');\n  console.log("Async resolved URL:", asyncResolvedURL);\n })();<\/code><\/pre>\n
    \u8fd9\u4e2a\u793a\u4f8b\u6f14\u793a\u4e86 import.meta.resolve \u51fd\u6570\u7684\u540c\u6b65\u548c\u5f02\u6b65\u7528\u6cd5\u3002<\/p>\n
    4.V8 \u5f15\u64ce\u5347\u7ea7\uff1a\u91ca\u653e\u91ce\u517d\uff01<\/strong><\/p>\n
    \u4ee5\u4e0b\u662f\u4e00\u4e9bV8 \u5f15\u64ce\u65b0\u529f\u80fd\u7684\u5feb\u901f\u6982\u8ff0\uff1a<\/p>\n