{"id":7218,"date":"2022-11-29T09:20:14","date_gmt":"2022-11-29T01:20:14","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7218"},"modified":"2023-11-28T15:58:47","modified_gmt":"2023-11-28T07:58:47","slug":"javascript-tong-bu-yi-bu","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2022\/11\/29\/javascript-tong-bu-yi-bu\/","title":{"rendered":"Javascript\u540c\u6b65\u5f02\u6b65"},"content":{"rendered":"

##JS\u4e09\u5ea7\u5927\u5c71
\n\"\"
\n\"\"<\/p>\n

\n

JavaScript\u662f\u4e00\u95e8\u5355\u7ebf\u7a0b\u7684\u8bed\u8a00\uff0c\u56e0\u6b64\uff0cJavaScript\u5728\u540c\u4e00\u4e2a\u65f6\u95f4\u53ea\u80fd\u505a\u4e00\u4ef6\u4e8b\uff0c\u5355\u7ebf\u7a0b\u610f\u5473\u7740\uff0c\u5982\u679c\u5728\u540c\u4e2a\u65f6\u95f4\u6709\u591a\u4e2a\u4efb\u52a1\u7684\u8bdd\uff0c\u8fd9\u4e9b\u4efb\u52a1\u5c31\u9700\u8981\u8fdb\u884c\u6392\u961f\uff0c\u524d\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\uff0c\u624d\u4f1a\u6267\u884c\u4e0b\u4e00\u4e2a\u4efb\u52a1<\/p>\n<\/blockquote>\n

###JavaScript\u7684\u5355\u7ebf\u7a0b\uff0c\u4e0e\u5b83\u7684\u7528\u9014\u662f\u6709\u5f88\u5927\u5173\u7cfb\uff0cJavaScript\u662f\u6d4f\u89c8\u5668\u7684\u811a\u672c\u8bed\u8a00<\/p>\n

###\u5f02\u6b65\u7684\u4ea7\u751f\u539f\u56e0
\n1\u3001\u5b9a\u65f6\u5668\u90fd\u662f\u5f02\u6b65\u64cd\u4f5c
\n2\u3001\u4e8b\u4ef6\u7ed1\u5b9a\u90fd\u662f\u5f02\u6b65\u64cd\u4f5c
\n3\u3001AJAX\u4e2d\u4e00\u822c\u6211\u4eec\u90fd\u91c7\u53d6\u5f02\u6b65\u64cd\u4f5c
\n4\u3001\u56de\u8c03\u51fd\u6570\u53ef\u4ee5\u7406\u89e3\u4e3a\u5f02\u6b65<\/p>\n

\/\/ \u540c\u6b65\u4ee3\u7801\nfunction fun1() {\n  console.log(1);\n}\nfunction fun2() {\n  console.log(2);\n}\nfun1();\nfun2();\n\n\/\/ \u8f93\u51fa\n1\n2\n\n<\/code><\/pre>\n
##\u8868\u767d\u7684\u6848\u4f8b
\n\"\"<\/p>\n
##\u540c\u6b65\u548c\u5f02\u6b65<\/p>\n
<\/span><\/a><\/h2>\n
\n
\u56e0\u4e3aJavaScript\u7684\u5355\u7ebf\u7a0b\uff0c\u56e0\u6b64\u540c\u4e2a\u65f6\u95f4\u53ea\u80fd\u5904\u7406\u540c\u4e2a\u4efb\u52a1\uff0c\u6240\u6709\u4efb\u52a1\u90fd\u9700\u8981\u6392\u961f\uff0c\u524d\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\uff0c\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u4f46\u662f\uff0c\u5982\u679c\u524d\u4e00\u4e2a\u4efb\u52a1\u7684\u6267\u884c\u65f6\u95f4\u5f88\u957f\uff0c\u6bd4\u5982\u6587\u4ef6\u7684\u8bfb\u53d6\u64cd\u4f5c\u6216ajax\u64cd\u4f5c\uff0c\u540e\u4e00\u4e2a\u4efb\u52a1\u5c31\u4e0d\u5f97\u4e0d\u7b49\u7740\uff0c\u62ffajax\u6765\u8bf4\uff0c\u5f53\u7528\u6237\u5411\u540e\u53f0\u83b7\u53d6\u5927\u91cf\u7684\u6570\u636e\u65f6\uff0c\u4e0d\u5f97\u4e0d\u7b49\u5230\u6240\u6709\u6570\u636e\u90fd\u83b7\u53d6\u5b8c\u6bd5\u624d\u80fd\u8fdb\u884c\u4e0b\u4e00\u6b65\u64cd\u4f5c\uff0c\u7528\u6237\u53ea\u80fd\u5728\u90a3\u91cc\u5e72\u7b49\u7740\uff0c\u4e25\u91cd\u5f71\u54cd\u7528\u6237\u4f53\u9a8c<\/p>\n<\/blockquote>\n
###\u540c\u6b65\u4efb\u52a1
\n\u540c\u6b65\u4efb\u52a1\u662f\u6307\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6392\u961f\u6267\u884c\u7684\u4efb\u52a1\uff0c\u53ea\u6709\u524d\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u5f53\u6211\u4eec\u6253\u5f00\u7f51\u7ad9\u65f6\uff0c\u7f51\u7ad9\u7684\u6e32\u67d3\u8fc7\u7a0b\uff0c\u6bd4\u5982\u5143\u7d20\u7684\u6e32\u67d3\uff0c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u540c\u6b65\u4efb\u52a1<\/p>\n
###\u5f02\u6b65\u4efb\u52a1
\n\u5f02\u6b65\u4efb\u52a1\u662f\u6307\u4e0d\u8fdb\u5165\u4e3b\u7ebf\u7a0b\uff0c\u800c\u8fdb\u5165\u4efb\u52a1\u961f\u5217\u7684\u4efb\u52a1\uff0c\u53ea\u6709\u4efb\u52a1\u961f\u5217\u901a\u77e5\u4e3b\u7ebf\u7a0b\uff0c\u67d0\u4e2a\u5f02\u6b65\u4efb\u52a1\u53ef\u4ee5\u6267\u884c\u4e86\uff0c\u8be5\u4efb\u52a1\u624d\u4f1a\u8fdb\u5165\u4e3b\u7ebf\u7a0b\uff0c\u5f53\u6211\u4eec\u6253\u5f00\u7f51\u7ad9\u65f6\uff0c\u50cf\u56fe\u7247\u7684\u52a0\u8f7d\uff0c\u97f3\u4e50\u7684\u52a0\u8f7d\uff0c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u5f02\u6b65\u4efb\u52a1<\/p>\n
##\u5f02\u6b65
\n\u5f02\u6b65\uff08Asynchronous, async\uff09
\n\u540c\u6b65\uff08Synchronous, sync\uff09
\n\"\"<\/p>\n
function fun1() {\n  console.log(1);\n}\nfunction fun2() {\n  console.log(2);\n}\nfunction fun3() {\n  console.log(3);\n}\nfun1();\nsetTimeout(function(){\n  fun2();\n},0);\nfun3();\n \n\/\/ \u8f93\u51fa\n<\/code><\/pre>\n
###\u5f02\u6b65\u673a\u5236<\/p>\n
    \n
  1. \u6240\u6709\u540c\u6b65\u4efb\u52a1\u90fd\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\uff0c\u884c\u6210\u4e00\u4e2a\u6267\u884c\u6808<\/li>\n
  2. \u4e3b\u7ebf\u7a0b\u4e4b\u5916\uff0c\u8fd8\u5b58\u5728\u4e00\u4e2a\u4efb\u52a1\u961f\u5217\uff0c\u53ea\u8981\u5f02\u6b65\u4efb\u52a1\u6709\u4e86\u7ed3\u679c\uff0c\u5c31\u4f1a\u5728\u4efb\u52a1\u961f\u5217\u4e2d\u653e\u7f6e\u4e00\u4e2a\u4e8b\u4ef6<\/li>\n
  3. \u4e00\u65e6\u6267\u884c\u6808\u4e2d\u7684\u6240\u6709\u540c\u6b65\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u7cfb\u7edf\u5c31\u4f1a\u8bfb\u53d6\u4efb\u52a1\u961f\u5217\uff0c\u770b\u770b\u91cc\u9762\u8fd8\u6709\u54ea\u4e9b\u4e8b\u4ef6\uff0c\u90a3\u4e9b\u5bf9\u5e94\u7684\u5f02\u6b65\u4efb\u52a1\uff0c\u4e8e\u662f\u7ed3\u675f\u7b49\u5f85\u72b6\u6001\uff0c\u8fdb\u5165\u6267\u884c\u6808\uff0c\u5f00\u59cb\u6267\u884c<\/li>\n
  4. \u4e3b\u7ebf\u7a0b\u4e0d\u65ad\u7684\u91cd\u590d\u4e0a\u9762\u7684\u7b2c\u4e09\u6b65<\/li>\n<\/ol>\n
    \"\"<\/p>\n
    \"\"<\/p>\n
    ###JS \u5f02\u6b65\u7f16\u7a0b\u8fdb\u5316\u53f2
    \n\"\"<\/p>\n
    \n
    async\/await\u53ef\u4ee5\u8bf4\u662f\u5f02\u6b65\u7ec8\u6781\u89e3\u51b3\u65b9\u6848\u4e86<\/p>\n<\/blockquote>\n
    ##\u5f02\u6b65\u7f16\u7a0b
    \n###\u56de\u8c03\u51fd\u6570(callback)
    \nAJAX\u3002\u3002\u3002
    \nsetTimeout
    \n\"\"<\/p>\n
    setTimeout(() => {\n    task();\n},3000)\nconsole.log('\u6267\u884cconsole');\n\/\/ \u6267\u884cconsole \n\/\/ task()\n \u2043 \nsetTimeout(() => {\n    task()\n},3000)\nsleep(10000000)\n \u2043 \nconsole.log('\u5148\u6267\u884c\u8fd9\u91cc');\nsetTimeout(() => {\n    console.log('\u6267\u884c\u5566')\n},0);\n\/\/ \u5148\u6267\u884c\u8fd9\u91cc\n\/\/ \u6267\u884c\u5566\n<\/code><\/pre>\n
    ###\u56de\u8c03\u4e0d\u4e00\u5b9a\u662f\u5f02\u6b65<\/p>\n
    function A(callback){\n    console.log("A");\n    callback();  \/\/\u8c03\u7528\u8be5\u51fd\u6570\n}\nfunction B(){\n   console.log("B");\n}\nA(B); \n\n<\/code><\/pre>\n
    <\/blockquote>\n
    ####\u56de\u8c03\u51fd\u6570\u7684\u4f18\u70b9\u662f\u7b80\u5355\u3001\u5bb9\u6613\u7406\u89e3\u548c\u90e8\u7f72
    \n####\u7f3a\u70b9\u662f\u4e0d\u5229\u4e8e\u4ee3\u7801\u7684\u9605\u8bfb\u548c\u7ef4\u62a4\uff0c\u5404\u4e2a\u90e8\u5206\u4e4b\u95f4\u9ad8\u5ea6\u8026\u5408\uff08Coupling\uff09\uff0c\u6d41\u7a0b\u4f1a\u5f88\u6df7\u4e71\uff0c\u800c\u4e14\u6bcf\u4e2a\u4efb\u52a1\u53ea\u80fd\u6307\u5b9a\u4e00\u4e2a\u56de\u8c03\u51fd\u6570<\/p>\n
    ##Promise<\/p>\n
    \n
    JavaScript\u5904\u7406\u5f02\u6b65\u90fd\u662f\u4ee5callback\u7684\u65b9\u5f0f\uff0c\u5728\u524d\u7aef\u5f00\u53d1\u9886\u57dfcallback\u673a\u5236\u51e0\u4e4e\u6df1\u5165\u4eba\u5fc3\uff0c\u8fd1\u51e0\u5e74\u968f\u7740JavaScript\u5f00\u53d1\u6a21\u5f0f\u7684\u9010\u6e10\u6210\u719f\uff0cCommonJS\u89c4\u8303\u987a\u52bf\u800c\u751f\uff0c\u5176\u4e2d\u5c31\u5305\u62ec\u63d0\u51fa\u4e86Promise\u89c4\u8303\uff0cPromise\u5b8c\u5168\u6539\u53d8\u4e86js\u5f02\u6b65\u7f16\u7a0b\u7684\u5199\u6cd5\uff0c\u8ba9\u5f02\u6b65\u7f16\u7a0b\u53d8\u5f97\u5341\u5206\u7684\u6613\u4e8e\u7406\u89e3\uff0c\u540c\u65f6Promise\u4e5f\u5df2\u7ecf\u7eb3\u5165\u4e86ES6\uff0c\u800c\u4e14\u9ad8\u7248\u672c\u7684chrome\u3001firefox\u6d4f\u89c8\u5668\u90fd\u5df2\u7ecf\u539f\u751f\u5b9e\u73b0\u4e86Promise<\/p>\n<\/blockquote>\n
    \"\"<\/p>\n\n\n\n\n\n\n\n
    \u4f18\u70b9<\/th>\n\u7f3a\u70b9<\/th>\n<\/tr>\n<\/thead>\n
    \u89e3\u51b3\u56de\u8c03<\/td>\n\u65e0\u6cd5\u68c0\u67e5\u8fdb\u884c\u72b6\u6001<\/td>\n<\/tr>\n
    \u94fe\u5f0f\u8c03\u7528<\/td>\n\u5efa\u7acb\u4e14\u6267\u884c\u65e0\u6cd5\u53d6\u6d88<\/td>\n<\/tr>\n
    \u51cf\u5c11\u5d4c\u5957<\/td>\n\u5185\u90e8\u9519\u8bef\u65e0\u6cd5\u6355\u6349<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n