{"id":53373,"date":"2024-12-03T17:53:15","date_gmt":"2024-12-03T09:53:15","guid":{"rendered":"https:\/\/fwq.ai\/blog\/53373\/"},"modified":"2024-12-03T17:53:15","modified_gmt":"2024-12-03T09:53:15","slug":"js-%e4%b8%ad%e7%9a%84%e4%b8%89%e5%85%83%e8%bf%90%e7%ae%97%e7%ac%a6%ef%bc%9a%e6%82%a8%e9%9c%80%e8%a6%81%e4%ba%86%e8%a7%a3%e7%9a%84%e4%b8%80%e5%88%87","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/53373\/","title":{"rendered":"JS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>JS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span>    <\/p>\n<p>\u6765\u5230\u7c73\u4e91\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aJS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241129\/17328823656749afbd7e0b6.jpg\" class=\"aligncenter\" title=\"JS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207\u63d2\u56fe\" alt=\"JS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207\u63d2\u56fe\" \/><\/p>\n<h2> \u4ec0\u4e48\u662f\u4e09\u5143\uff1f <\/h2>\n<p>\u4e09\u5143\u8fd0\u7b97\u7b26\u662f\u4e00\u4e2a javascript \u8fd0\u7b97\u7b26\uff0c\u81ea 2015 \u5e74 7 \u6708\u8d77\u53ef\u8de8\u6d4f\u89c8\u5668\u4f7f\u7528\u3002\u5b83\u662f if\/else \u8bed\u53e5\u7684\u7b80\u5199\u66ff\u4ee3\u65b9\u6848\u3002\u8be5\u8fd0\u7b97\u7b26\u5e7f\u6cdb\u5e94\u7528\u4e8e java\u3001c\u3001python \u7b49\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u4f46\u672c\u6587\u7684\u91cd\u70b9\u5c06\u653e\u5728 javascript \u4e0a\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u770b\u770b\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u4e00\u822c\u8bed\u6cd5\u3002<\/p>\n<pre>condition ? iftrue : iffalse\n<\/pre>\n<p>\u4ece\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u4e09\u5143\u8fd0\u7b97\u7b26\u76f8\u5e94\u5730\u66ff\u6362\u4e86 if \u548c else \u8bed\u53e5\uff0c\u7528 ?\u548c : \u7b26\u53f7\u3002\u5c06\u68c0\u67e5\u95ee\u53f7\u5de6\u4fa7\u7684\u6761\u4ef6\u3002\u5982\u679c\u4e3a true\uff0c\u5219\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4f4d\u4e8e ? \u4e4b\u95f4\u5e76\u4e14 : \u6807\u8bb0\u5c06\u88ab\u6267\u884c\u3002\u5982\u679c\u4e3a false\uff0c\u5219\u6267\u884c : \u7b26\u53f7\u540e\u9762\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002<\/p>\n<h2> \u5b83\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff1f <\/h2>\n<p>\u4e3a\u4e86\u7406\u89e3\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u6211\u4eec\u5c06\u5176\u4e0e\u5e38\u89c4 if\/else \u8bed\u53e5\u8fdb\u884c\u6bd4\u8f83\u3002 <br \/> \u4e0b\u9762\u7684 javascript \u4ee3\u7801\u5c06\u6709\u6761\u4ef6\u5730\u5c06\u5b57\u7b26\u4e32\u8bb0\u5f55\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<pre>let a = 10\n\nif(a == 10){\n    console.log(\"variable is ten!\")\n}else{\n    console.log(\"variable is not ten!\")\n}\n<\/pre>\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u91cd\u5199\u6b64\u4ee3\u7801\u3002<\/p>\n<pre>let a = 10\na == 10 ? console.log(\"variable is ten!\") : console.log(\"variable is not ten!\")\n<\/pre>\n<p>\u6b64\u4ee3\u7801\u5757\u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\u6309\u7167\u6211\u4eec\u60f3\u8981\u7684\u65b9\u5f0f\u6709\u6761\u4ef6\u5730\u8bb0\u5f55\u5b57\u7b26\u4e32\u3002\u4f46\u662f\u8fd9\u4e2a\u8bed\u53e5\u8fd8\u6709\u66f4\u597d\u7684\u5199\u6cd5\u3002<br \/> \u4e09\u5143\u8fd0\u7b97\u7b26\u4e0d\u4ec5\u6267\u884c\u8868\u8fbe\u5f0f\uff0c\u8fd8\u8fd4\u56de\u503c\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u79cd\u5904\u7406\u540c\u4e00\u4e2a console.log \u8bed\u53e5\u4e2d\u4e24\u4e2a\u4e0d\u540c\u503c\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u8be5\u8bed\u53e5\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u8fd0\u7b97\u7b26\u6765\u5904\u7406\u4e24\u4e2a\u4e0d\u540c\u7684 console.log \u8868\u8fbe\u5f0f\u3002 <br \/> \u4f8b\u5982\uff1a<\/p>\n<pre>let a = 10\nconsole.log(a == 10 ? \"variable is ten!\" : \"variable is not ten!\")\n<\/pre>\n<p>\u8fd9\u884c\u7684\u8f93\u51fa\u5c06\u4e0e\u6211\u4eec\u4e4b\u524d\u7f16\u5199\u7684\u5176\u4ed6\u4e09\u5143\u8868\u8fbe\u5f0f\u5b8c\u5168\u76f8\u540c\u3002\u4f46\u8fd9\u6bb5\u4ee3\u7801\u66f4\u52a0\u7d27\u51d1\uff0c\u6613\u4e8e\u9605\u8bfb\u3002 <\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u6709\u6761\u4ef6\u5730\u4e3a\u53d8\u91cf\u8d4b\u503c\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u5305\u542b\u5e38\u89c4 if\/else \u8bed\u53e5\u7684\u793a\u4f8b\uff0c\u7136\u540e\u4f7f\u7528\u4e09\u5143\u518d\u6b21\u7f16\u5199\u5b83\u3002<\/p>\n<pre>let a = 10\nlet b\nif(a === 10){\n    b = a * 5\n}else{\n    b = a * 2\n}\n<\/pre>\n<p>\u5982\u679c a \u662f 10\uff0c\u5219\u4ee3\u7801\u5757\u4f1a\u5c06\u5176\u4e58\u4ee5 5\uff0c\u5426\u5219\u4f1a\u5c06\u53d8\u91cf\u4e58\u4ee5 2\uff0c\u5e76\u4e14\u5728\u8fd9\u4e24\u79cd\u60c5\u51b5\u4e0b\uff0c\u90fd\u4f1a\u5c06\u5176\u5206\u914d\u7ed9 b\u3002 <br \/> \u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u66ff\u4ee3\u65b9\u6848\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>let a = 10\nlet b = a === 10 ? a * 5 : a * 2\n<\/pre>\n<p>\u5982\u60a8\u6240\u89c1\uff0c\u4e3a\u8fd9\u6837\u7684\u57fa\u672c\u64cd\u4f5c\u7f16\u5199\u5355\u884c\u4ee3\u7801\u4f1a\u66f4\u65b9\u4fbf\u3002<\/p>\n<h2> \u5d4c\u5957\u6761\u4ef6 <\/h2>\n<p>\u6709\u65f6\u6211\u4eec\u5fc5\u987b\u5728\u5f7c\u6b64\u5185\u90e8\u4f7f\u7528\u591a\u4e2a if\/else \u6761\u4ef6\u3002\u4e09\u5143\u8fd0\u7b97\u7b26\u53ef\u7528\u4e8e\u94fe\u63a5\u6761\u4ef6\u3002<\/p>\n<pre>let a = 5\nif(a === 1){\n    console.log(\"1\")\n}else if(a === 2){\n    console.log(\"2\")\n}else{\n    console.log(\"a is not 1 or 2\")\n}\n<\/pre>\n<p>\u4e0a\u9762\u663e\u793a\u7684\u6761\u4ef6\u94fe\u53ef\u4ee5\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u8868\u793a\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>let a = 5\nconsole.log(a === 1 ? \"1\" : a === 2 ? \"2\" : \"a is not 1 or 2\")\n<\/pre>\n<p>\u6b63\u5982\u4f60\u6240\u9884\u6599\u7684\u90a3\u6837\uff0c\u8fd9\u5f88\u5bb9\u6613\u53d8\u5f97\u975e\u5e38\u6df7\u4e71\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4e0d\u9700\u8981\u5728\u590d\u6742\u7684\u6761\u4ef6\u8bed\u53e5\u4e2d\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u3002<\/p>\n<h2> react \u4e2d\u7684\u4e09\u5143 <\/h2>\n<p>\u5982\u679c\u60a8\u4e4b\u524d\u6784\u5efa\u8fc7 react \u5e94\u7528\u7a0b\u5e8f\uff0c\u60a8\u53ef\u80fd\u77e5\u9053\u6761\u4ef6\u6e32\u67d3\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u4e3b\u9898\u3002\u4e09\u5143\u8fd0\u7b97\u7b26\u4f7f\u8fd9\u4e2a\u64cd\u4f5c\u53d8\u5f97\u66f4\u5bb9\u6613\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b react \u5b98\u65b9\u9875\u9762\u7684\u793a\u4f8b\u3002<br \/> \u8fd9\u662f\u7f16\u5199\u58f0\u660e\u7684\u5e38\u89c4\u65b9\u5f0f\uff1a<\/p>\n<pre>if (ispacked) {\n  return &lt;li classname=\"item\"&gt;{name} &lt;\/li&gt;;\n}\nreturn &lt;li classname=\"item\"&gt;{name}&lt;\/li&gt;;\n<\/pre>\n<p>\u8fd9\u662f\u76f8\u540c\u7684\u8bed\u53e5\uff0c\u4f46\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u3002<\/p>\n<pre>return (\n  &lt;li className=\"item\"&gt;\n    {isPacked ? name + ' ' : name}\n  &lt;\/li&gt;\n);\n<\/pre>\n<p>\u6b63\u5982\u4f60\u6240\u770b\u5230\u7684\uff0c\u5b83\u770b\u8d77\u6765\u597d\u591a\u4e86\u3002\u56e0\u6b64\uff0c\u6709\u65f6\u4f7f\u7528\u4e09\u5143\u7f16\u5199\u8bed\u53e5\u662f\u66f4\u5e72\u51c0\u3001\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u5c24\u5176\u662f\u5728\u4f7f\u7528 react \u65f6\u3002\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e09\u5143\u8fd0\u7b97\u7b26\u4f1a\u4f7f\u4ee3\u7801\u66f4\u96be\u9605\u8bfb\u3002 <\/p>\n<p>\u60a8\u8ba4\u4e3a\u5728\u54ea\u4e9b\u5176\u4ed6\u60c5\u51b5\u4e0b\u6211\u4eec\u5fc5\u987b\u4f7f\u7528\u6216\u907f\u514d\u4e09\u5143\u8fd0\u7b97\u7b26\uff1f\u8bf7\u5728\u8bc4\u8bba\u4e2d\u8ba9\u6211\u77e5\u9053\u60a8\u7684\u60f3\u6cd5\uff01 <\/p>\n<p>\u611f\u8c22\u60a8\u7684\u9605\u8bfb\u3002<br \/> \u8bf7\u67e5\u770b\u8fd9\u4e9b\u94fe\u63a5\u4ee5\u8fdb\u4e00\u6b65\u9605\u8bfb\u3002<\/p>\n<ul>\n<li>\u6709\u5173\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u66f4\u591a\u4fe1\u606f\uff1a\u6761\u4ef6\uff08\u4e09\u5143\uff09\u8fd0\u7b97\u7b26 &#8211; mdn web \u6587\u6863 <\/li>\n<li>\u6709\u5173 react \u4e2d\u6761\u4ef6\u6e32\u67d3\u7684\u66f4\u591a\u4fe1\u606f\uff1a\u6761\u4ef6\u6e32\u67d3 &#8211; react <\/li>\n<\/ul>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u5427\uff01<\/p>\n<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664    <\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   Form-data \u6570\u636e\u4f20\u8f93\u4e2d\u7684 boundary \u662f\u7531\u6d4f\u89c8\u5668\u81ea\u52a8\u8bbe\u7f6e\u7684\u5417\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>JS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207 \u6536\u85cf \u6765\u5230\u7c73\u4e91\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300aJS \u4e2d\u7684\u4e09\u5143\u8fd0\u7b97\u7b26\uff1a\u60a8\u9700\u8981\u4e86\u89e3\u7684\u4e00\u5207\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01 \u4ec0\u4e48\u662f\u4e09\u5143\uff1f \u4e09\u5143\u8fd0\u7b97\u7b26\u662f\u4e00\u4e2a javascript \u8fd0\u7b97\u7b26\uff0c\u81ea 2015 \u5e74 7 \u6708\u8d77\u53ef\u8de8\u6d4f\u89c8\u5668\u4f7f\u7528\u3002\u5b83\u662f if\/else \u8bed\u53e5\u7684\u7b80\u5199\u66ff\u4ee3\u65b9\u6848\u3002\u8be5\u8fd0\u7b97\u7b26\u5e7f\u6cdb\u5e94\u7528\u4e8e java\u3001c\u3001python \u7b49\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u4f46\u672c\u6587\u7684\u91cd\u70b9\u5c06\u653e\u5728 javascript \u4e0a\u3002 \u8ba9\u6211\u4eec\u770b\u770b\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u4e00\u822c\u8bed\u6cd5\u3002 condition ? iftrue : iffalse \u4ece\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\u53ef\u4ee5\u770b\u5230\uff0c\u4e09\u5143\u8fd0\u7b97\u7b26\u76f8\u5e94\u5730\u66ff\u6362\u4e86 if \u548c else \u8bed\u53e5\uff0c\u7528 ?\u548c : \u7b26\u53f7\u3002\u5c06\u68c0\u67e5\u95ee\u53f7\u5de6\u4fa7\u7684\u6761\u4ef6\u3002\u5982\u679c\u4e3a true\uff0c\u5219\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4f4d\u4e8e ? \u4e4b\u95f4\u5e76\u4e14 : \u6807\u8bb0\u5c06\u88ab\u6267\u884c\u3002\u5982\u679c\u4e3a false\uff0c\u5219\u6267\u884c : \u7b26\u53f7\u540e\u9762\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002 \u5b83\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff1f \u4e3a\u4e86\u7406\u89e3\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u6211\u4eec\u5c06\u5176\u4e0e\u5e38\u89c4 if\/else \u8bed\u53e5\u8fdb\u884c\u6bd4\u8f83\u3002 \u4e0b\u9762\u7684 javascript \u4ee3\u7801\u5c06\u6709\u6761\u4ef6\u5730\u5c06\u5b57\u7b26\u4e32\u8bb0\u5f55\u5230\u63a7\u5236\u53f0\u3002 let a = 10 if(a == 10){ [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-53373","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=53373"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53373\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=53373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=53373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=53373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}