{"id":926,"date":"2022-03-10T21:34:03","date_gmt":"2022-03-10T13:34:03","guid":{"rendered":"http:\/\/www.henrycome.com\/wordpress\/?p=926"},"modified":"2022-03-10T22:24:08","modified_gmt":"2022-03-10T14:24:08","slug":"20220310213413","status":"publish","type":"post","link":"http:\/\/www.henrycome.com\/wordpress\/202203102134\/926","title":{"rendered":"P114-118-\u6a21\u5757\u5316.js"},"content":{"rendered":"<pre><code class=\"language-javascript\">\/*P114-\u6a21\u5757\u5316-\u5bfc\u51fa\u6a21\u5757*\/\n\/\/\u6a21\u5757\u5316\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7f16\u7a0b\u601d\u60f3\uff0c\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u5c01\u88c5\u6027\n\/\/\u5982\u679c\u4ee3\u7801\u5199\u5728\u4e00\u4e2a\u6587\u4ef6\u4e2d\u5f88\u96be\u9605\u8bfb\uff0c\u4f53\u79ef\u4e5f\u4f1a\u53d8\u5927\n\n\/\/\u6a21\u5757\u5316\uff1a\n\/\/1.\u5c31\u662f\u628a\u76f8\u4f3c\u76f8\u5173\u529f\u80fd\u7684\u4ee3\u7801\u653e\u5230\u4e00\u4e2a\u5355\u72ec\u6587\u4ef6\u4e2d\uff0c\n\/\/2.\u7136\u540e\u901a\u8fc7\u6a21\u5757\u6765\u5bfc\u51fa\u8ba9\u5176\u4ed6\u6587\u4ef6\u6765\u8c03\u7528\u7684\u4ee3\u7801\n\/\/3.\u5176\u4ed6\u6587\u4ef6\u901a\u8fc7\u5bfc\u5165\u6765\u4f7f\u7528\u5bfc\u51fa\u7684\u4ee3\u7801\n\/\/4.\u4ece\u800c\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u5c01\u88c5\u6027\n\n\/\/\u5bfc\u51fa\u6a21\u5757\uff0cES6\u539f\u751f\u652f\u6301\u6a21\u5757\u5316\u7684\u52a0\u8f7d\n\/\/\u65b0\u5efa\u4e00\u4e2a\u540d\u4e3a\u2018utils.js\u2019\u7684js\u6587\u4ef6\uff0c\u91cc\u9762\u653e\u4e00\u4e9b\u5de5\u5177\u7c7b\u7684\u4ee3\u7801\n\/\/utils.js\u91cc\u9762\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u6765\u683c\u5f0f\u5316\u4e00\u4e2a\u65e5\u671f\n\/\/\u5728function\u524d\u9762\u52a0\u4e0aexport\u5173\u952e\u5b57\u5c31\u53ef\u4ee5\u5b8c\u6210\u5bfc\u51fa\n\/\/\u8f93\u5165\u4ee3\u7801\u5982\u4e0b\uff1a\u8be6\u60c5\u53c2\u8003utils.js\n\/*\nexport function formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\n*\/\n\n\/*P115-\u6a21\u5757\u5316-\u5bfc\u5165\u6a21\u5757\n\/\/\u52a0\u5165index.js\u8c03\u7528utils.js,\u90a3\u4e48\u9996\u5148\u9700\u8981\u5728\u5f15\u5165index.js\u7684HTML\u6587\u4ef6\u4e2d\u505a\u5982\u4e0b\u4fee\u6539\n\/\/&lt;script src=&quot;.\/index.js&quot; type=&quot;module&quot;&gt;,type=&quot;module&quot;\u53ef\u4ee5\u8ba9index.js\u53ef\u4ee5\u4f7f\u7528import\u5173\u952e\u5b57\n\/\/\u4f7f\u7528import\u5173\u952e\u5b57\u5bfc\u5165\n\/\/import {\u51fd\u6570\u540d} from &#039;\u8def\u5f84\/\u6587\u4ef6\u540d.js&#039;\/\/\u540e\u9762\u624d\u77e5\u9053P116\u91cc\u9762\u7684\u53d8\u91cf\u4e5f\u53ef\u4ee5\u5bfc\u51fa\uff01\n\nimport {formatDate} from &#039;.\/utils.js&#039;;\nconsole.log(formatDate(new Date()));\/\/2022-1-11\/\/\u5b9e\u9645\u662f2\u670811\u65e5\uff0c\u6708\u4efd\u4ece0\u5f00\u59cb\u6392\u7684\u3002\n\n\/\/\uff1f\u6709\u5fc5\u8981\u5b66\u4e60\u8fd9\u4e2a\u8def\u5f84\u95ee\u9898.\u548c\/\u4ee3\u8868\u5565\u5462\uff1f\/\/\u641c\u7d22\uff1f\u53ef\u4ee5\u627e\u5230\u6211\u7559\u7684\u7591\u95ee\u3002\n\/** *\/\n\n\/*P116-\u6a21\u5757\u5316-\u5bfc\u51fa\u591a\u4e2a\u6761\u76ee*\/\n\/\/\u5982\u679c\u6a21\u5757\u4e2d\uff0c\u5bfc\u51fa\u4e0d\u6b62\u4e00\u4e2a\u6761\u76ee\uff0c\u6bd4\u5982\u6211\u8fd8\u60f3\u5bfc\u51fa\u4e00\u4e2a\u5e38\u91cf\uff0c\u5b9a\u4e49\u4e00\u5e74\u6709\u591a\u5c11\u5929\n\/\/\u5c31\u53ef\u4ee5\u518d\u5199\u4e00\u4e2aexport\n\n\/*\u589e\u52a0\u4e00\u4e2a\u5bfc\u51fa\u5e76\u5bfc\u5165\n\/\/VH\uff1a\u4e00\u4e2a\u53d8\u91cf\u4e5f\u53ef\u4ee5\u5bfc\u51fa\uff1f\uff01\u4e0b\u65b9\u4ee3\u7801\u653e\u5230utils.js\u4e2d\u5373\u53ef\n\/\/export const DAYS_OF_YEAR = 365;\/\/\u5982\u679c\u4e0d\u52a0const\u63d0\u793a\u5e94\u6709\u58f0\u660e\u6216\u8bed\u53e5\n\n\/\/\u6dfb\u52a0\u65b0\u7684\u5bfc\u5165\uff0c1\u53ef\u4ee5\u76f4\u63a5\u5728import{}\u4e2d\u6dfb\u52a0\uff0c\n\/\/\u6216\u8005VScode\u652f\u6301\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u5bfc\u51fa\u7684\u540d\u79f0\uff0cimport{}\u4e2d\u81ea\u52a8\u6dfb\u52a0\uff0c\u800c\u4e14\u8f93\u5165\u540d\u79f0\u7684\u65f6\u5019\uff0cVScode\u5df2\u7ecf\u6709\u63d0\u793a\u4f1a\u8865\u5168\n\nimport {DAYS_OF_YEAR, formatDate} from &#039;.\/utils.js&#039;;\nconsole.log(formatDate(new Date()));\/\/2022-1-11\/\/\u5b9e\u9645\u662f2\u670811\u65e5\uff0c\u6708\u4efd\u4ece0\u5f00\u59cb\u6392\u7684\u3002\nconsole.log(DAYS_OF_YEAR);\/\/365\n\/** *\/\n\n\/*\u5bfc\u51fa\u65b9\u5f0f\u7b2c\u4e8c\u79cd\uff0c\u5728\u6a21\u5757\u5e95\u90e8\n\/\/export{\u540d\u79f01,\u540d\u79f02}\uff0c\u8fd9\u4e2a\u65b9\u5f0f\u53eb\u547d\u540d\u65b9\u5f0f\u5bfc\u51fa\uff0c\u56de\u5934\u8c03\u7528\u7684\u65f6\u5019\u5c31\u662f\u8fd9\u4e2a\u540d\u5b57\n\/\/\u53bb\u6389\u539f\u6765\u5b9a\u4e49\u51fd\u6570\u548c\u53d8\u91cf\u7684\u65f6\u5019\u5f00\u5934\u7684export\u5173\u952e\u5b57\uff0c\n\/\/\u590d\u5236\u5230utils.js:\n\/\/export {formatDate, DAYS_OF_YEAR}\n\/\/\u8c03\u7528\u7ed3\u679c\u7ee7\u7eed\u6709\u6548\nimport {DAYS_OF_YEAR, formatDate} from &#039;.\/utils.js&#039;;\nconsole.log(formatDate(new Date()));\/\/2022-1-11\/\/\u5b9e\u9645\u662f2\u670811\u65e5\uff0c\u6708\u4efd\u4ece0\u5f00\u59cb\u6392\u7684\u3002\nconsole.log(DAYS_OF_YEAR);\/\/365\n\/** *\/\n\n\/*P117-\u6a21\u5757\u5316-\u9ed8\u8ba4\u5bfc\u51fa*\/\n\/\/\u9664\u4e86\u4e0a\u9762export{\u540d\u5b57,\u540d\u5b57}\uff0c\u547d\u540d\u5bfc\u51fa\uff0c\n\/\/\u8fd8\u6709\u7528default\u5173\u952e\u5b57\u5bfc\u51fa\u9ed8\u8ba4\u7684\u6761\u76ee\n\n\/\/\u6ce8\u91ca\u539f\u5bfc\u51fa\u8bed\u53e5\uff0c\u590d\u5236\u4e0b\u65b9\u8bed\u53e5\u5230utils.js\n\/\/export default formatDate;\n\/\/\u8c03\u7528\u65f6\u5019\uff0c\u53ef\u4ee5\u4e0d\u7528{}\uff0c\u76f4\u63a5\u4f7f\u7528\u539f\u540d\u6216\u5f53\u4e0b\u8d77\u540d\n\/\/\u540c\u65f6\u4e5f\u53ef\u4ee5\u7528\u539f\u65b9\u6cd5\uff0c\u5bfc\u51fa\u5176\u4ed6\u975e\u9ed8\u8ba4\u7684\u540d\u5b57 export{\u540d\u5b57,\u540d\u5b57}\uff0c\u4f46\u4e0d\u80fd\n\/\/\u8c03\u7528\u65b9\u5f0f\u4e5f\u662fimport \u9ed8\u8ba4, {\u540d\u5b57}\/\/\u6ce8\u610f\u9017\u53f7\u9694\u5f00\u9ed8\u8ba4\u540d\u548c{}\n\/\/VH\uff1a\u5176\u5b9e\u7ecf\u8fc7\u6d4b\u8bd5\uff0c3\u79cd\u5bfc\u51fa\u65b9\u5f0f\u662f\u53ef\u4ee5\u5e76\u5b58\u7684\u3002\u53c2\u8003utils.js\u6587\u4ef6\n\n\/*\u8c03\u7528\u9ed8\u8ba4\u5bfc\u51fa\n\/\/\u4f7f\u7528\u539f\u6765\u7684\u540d\u5b57\nimport formatDate from &#039;.\/utils.js&#039;;\nconsole.log(formatDate(new Date()));\/\/2022-1-11\n\n\/\/\u4f7f\u7528\u5f53\u4e0b\u65b0\u8d77\u7684\u540d\u5b57\nimport helloNewName from &#039;.\/utils.js&#039;;\nconsole.log(helloNewName(new Date()));\/\/2022-1-11\n\/** *\/\n\n\/*\u8c03\u7528\u6709\u9ed8\u8ba4\u5bfc\u51fa\u60c5\u51b5\u4e0b\uff0cexport {DAYS_OF_YEAR}\u7684\u5e38\u91cf\n\/\/VH\uff1a\u5176\u5b9e\u7ecf\u8fc7\u6d4b\u8bd5\uff0c3\u79cd\u5bfc\u51fa\u65b9\u5f0f\u662f\u53ef\u4ee5\u5e76\u5b58\u7684\u3002\u53c2\u8003utils.js\u6587\u4ef6\nimport helloNewName, {DAYS_OF_YEAR} from &#039;.\/utils.js&#039;;\nconsole.log(helloNewName(new Date()));\/\/2022-1-11\nconsole.log(DAYS_OF_YEAR);\/\/365\n\/** *\/\n\n\/*P118-\u6a21\u5757\u5316-\u522b\u540d*\/\n\n\/*\u8bfe\u7a0b\u4f8b\u5b50\u90e8\u5206\n\/\/\u4f7f\u7528\u9ed8\u8ba4\u5bfc\u51fa\u65b9\u5f0f\u7684\u540d\u5b57\u53ef\u4ee5\u5728\u8c03\u7528\u65f6\u81ea\u5b9a\u4e49\uff0c\n\/\/\u4f7f\u7528\u547d\u540d\u65b9\u5f0f\u5bfc\u51fa\u7684\u4e5f\u53ef\u4ee5\n\/\/{\u540d\u5b57 as \u65b0\u540d\u5b57}\u5373\u53ef\nimport helloNewName, {DAYS_OF_YEAR as DAYS} from &#039;.\/utils.js&#039;;\nconsole.log(helloNewName(new Date()));\/\/2022-1-11\nconsole.log(DAYS);\/\/365\n\n\/\/\u5bfc\u51fa\u591a\u6761\u76ee\u7ec4\u6210\u5bf9\u8c61\n\/\/\u9ed8\u8ba4\u5bfc\u51fa\u6761\u76ee\u53ea\u80fd\u4f7f\u7528default\u6765\u8c03\u7528\uff0c\u7ecf\u8fc7\u6d4b\u8bd5\uff08\u672c\u8282\u7b14\u8bb0\u5728\u6700\u540e\uff09\n\/\/VH:\u3010\u6682\u5b9a\u3011\u5176\u4ed6\u53ea\u80fd\u4f7f\u7528\u5728utils.js\u5b9a\u4e49\u65f6\u5019\u7684\u540d\u5b57\n\/\/\u4e0a\u8ff0\u4e24\u4e2a\u4f8b\u5b50\uff0c\u90fd\u53ef\u4ee5\u6b63\u5e38\u5f97\u5230\u7ed3\u679c\uff0c\u5bfc\u5165import\u4f1a\u51fa\u73b0\u91cd\u590d\u51b2\u7a81\u4e48\uff1f\nimport * as utils from &#039;.\/utils.js&#039;;\nconsole.log(utils.default(new Date()));\nconsole.log(utils.DAYS_OF_YEAR);\n\/** *\/\n\n\/*\u6d4b\u8bd5\u90e8\u5206\u5bfc\u5165\u51b2\u7a81\u95ee\u9898\n\/\/import\u5bfc\u5165\u662f\u5426\u56e0\u91cd\u590d\u51b2\u7a81\u6d4b\u8bd5\n\/\/\u53ea\u5728\u5bfc\u5165\u8fdb\u6765\u4e4b\u540e\u7684\u540d\u5b57\u76f8\u540c\u7684\u65f6\u5019\u3002\n\/\/\u63d0\u793a\uff1aUncaught SyntaxError: Identifier &#039;DAYS_OF_YEAR&#039; has already been declared\n\n\/\/\u6d4b\u8bd5\u662f\u5728utils.js\u4e2d\u6709\u9ed8\u8ba4\u5bfc\u51fa\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\uff0c\n\/\/\u5982\u679c\u6ca1\u6709\u9ed8\u8ba4\u5bfc\u51fa\uff0c\u7ed3\u8bba\u5e94\u8be5\u7c7b\u4f3c\uff0c\n\/\/\u9ed8\u8ba4\u5bfc\u51fa\u5bfc\u5165\u65f6\u91cd\u65b0\u8d77\u4e2a\u540d\uff0c\u6b63\u5e38\u5bfc\u5165\u7684as\u4e00\u4e2a\u65b0\u540d\u5373\u53ef\n\nimport helloNewName, {DAYS_OF_YEAR} from &#039;.\/utils.js&#039;;\nconsole.log(helloNewName(new Date()));\/\/2022-1-11\nconsole.log(DAYS_OF_YEAR);\/\/365\n\nimport helloNewName2, {DAYS_OF_YEAR as DAYS} from &#039;.\/utils.js&#039;;\nconsole.log(helloNewName(new Date()));\/\/2022-1-11\nconsole.log(DAYS);\/\/365\n\/** *\/\n\n\/*\u6d4b\u8bd52*\uff1a\u4f7f\u7528utils.formatDate\u8c03\u7528\u9ed8\u8ba4\u5bfc\u51fa\n\/\/\u7ed3\u679c\u662f\u4e0d\u53ef\u4ee5\uff0c\u53ea\u80fd\u4f7f\u7528default\nimport * as utils from &#039;.\/utils.js&#039;;\nconsole.log(utils.formatDate(new Date()));\/\/Uncaught TypeError: utils.formatDate is not a function\n\/** *\/<\/code><\/pre>\n<pre><code class=\"language-javascript\">\/\/\u4ee5\u4e0b\u4ee3\u7801\u4e3autils.js\u5185\u5bb9\n\/\/\u914d\u5408\u300aP114-118-\u6a21\u5757\u5316.js\u300b\u4f7f\u7528\n\n\/*P114-\u6a21\u5757\u5316-\u5bfc\u51fa\u6a21\u5757*\/\n\/*\u7b2c\u4e00\u79cd\u5bfc\u51fa\u65b9\u5f0f*\/\n\n\/**\n * \n * @param {Date} date \n * @returns \n*\/\n\/\/ export function formatDate(date){\n\/\/     return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n\/\/ }\n\/*\u8bb2\u4e862\u4e2a\u77e5\u8bc6\u70b9\n\u5728function\u524d\u9762\u52a0\u4e0aexport\u5173\u952e\u5b57\u5c31\u53ef\u4ee5\u5b8c\u6210\u5bfc\u51fa\n\u6ce8\u91ca\u7684\u4f7f\u7528\uff0c\u53ef\u4ee5\u5728\u4e0b\u9762\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u76f4\u63a5\u6709\u4ee3\u7801\u63d0\u793a\n\u6ca1\u4f7f\u7528\u6ce8\u91ca\u6389\u65f6\u5019\uff0cdate.\u8f93\u5165\u5230\u8fd9\u6709\u63d0\u793adate\u548cformateDate\n\u4f7f\u7528\u4e86\u8fd9\u4e2a\u6ce8\u91ca\uff0cdate.\u8f93\u5165\u5230\u8fd9\u4f1a\u6709\u5f88\u591aDate\u5bf9\u8c61\u7684\u65b9\u6cd5\u5c31\u51fa\u6765\u4e86\u3002\n*\/\n\n\/*P116-\u6a21\u5757\u5316-\u5bfc\u51fa\u591a\u4e2a\u6761\u76ee*\/\n\/*VH\uff1a\u4e00\u4e2a\u53d8\u91cf\u4e5f\u53ef\u4ee5\u5bfc\u51fa\uff1f\uff01\nexport function formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\nexport const DAYS_OF_YEAR = 365;\/\/\u5982\u679c\u4e0d\u52a0const\u63d0\u793a\u5e94\u6709\u58f0\u660e\u6216\u8bed\u53e5\n\/** *\/\n\n\/*\u53ef\u4ee5\u7b2c\u4e8c\u79cd\u5bfc\u51fa\u65b9\u5f0f\nfunction formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\n\nconst DAYS_OF_YEAR = 365;\nexport {formatDate,DAYS_OF_YEAR};\n\/** *\/\n\n\/*P117-\u6a21\u5757\u5316-\u9ed8\u8ba4\u5bfc\u51fa\nfunction formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\nconst DAYS_OF_YEAR = 365;\n\nexport default formatDate;\nexport {DAYS_OF_YEAR};\n\/** *\/\n\n\/*\u6d4b\u8bd5\u662f\u5426\u53ef\u4ee5\u6df7\u7528\uff1a\u53ef\u4ee5\u7684\n\/\/formatDate()\u91c7\u7528\u5e95\u90e8\u5bfc\u51fa\n\/\/\u5e38\u91cf\u91c7\u7528\u5b9a\u4e49\u65f6\u5bfc\u51fa\nfunction formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\nexport const DAYS_OF_YEAR = 365;\nexport default formatDate;\n\/** *\/\n\n\/*P118-\u6a21\u5757\u5316-\u522b\u540d\nfunction formatDate(date){\n    return `${date.getFullYear()}-${date.getMonth()}-${date.getDate()}`\n}\nconst DAYS_OF_YEAR = 365;\n\nexport default formatDate;\nexport {DAYS_OF_YEAR};\n\/** *\/<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\/*P114-\u6a21\u5757\u5316-\u5bfc\u51fa\u6a21\u5757*\/ \/\/\u6a21\u5757\u5316\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7f16\u7a0b\u601d\u60f3\uff0c\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u5c01\u88c5\u6027 \/\/\u5982\u679c 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