{"id":3946,"date":"2021-10-21T14:54:00","date_gmt":"2021-10-21T06:54:00","guid":{"rendered":"http:\/\/123.57.164.21\/?p=3946"},"modified":"2021-10-21T14:54:00","modified_gmt":"2021-10-21T06:54:00","slug":"nodejs%e4%b8%ad%e7%9a%84promise","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=3946","title":{"rendered":"nodejs\u4e2d\u7684promise"},"content":{"rendered":"\n

\u4e00\u62798oz\u7684\u7ea2\u9152\u676f\u5728\u7ecf\u5386\u4e86\u6c34\u8f6c\u5370\u540e\uff0c\u88ab\u9001\u4e0a\u4e86\u5305\u88c5\u6d41\u6c34\u7ebf\uff0c\u5305\u88c5\u5b8c\u6210\u540e\uff0c\u5c31\u53ef\u4ee5\u9001\u53bb\u6fc0\u5149\u6253\u6807\u4e86\u3002\u56e0\u6b64\u5728\u5305\u88c5\u7ebf\u4e0a\u6211\u4eec\u9700\u8981\u505a\uff1a<\/p>\n\n\n\n

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function pick(){\n    setTimeout(()=>{\n        console.log('\u6311\u62e3\u5b8c\u6210',new Date());\n    },500);\n}\nfunction groundMouth(){\n    setTimeout(()=>{\n        console.log('\u78e8\u53e3\u5b8c\u6210',new Date());\n    },400);\n}\nfunction blow(){\n    setTimeout(()=>{\n        console.log('\u5439\u6c14\u5b8c\u6210',new Date());\n    },300);\n}\nfunction PEbag(){\n    setTimeout(()=>{\n        console.log('\u5df2\u5957PE\u888b',new Date());\n    },200);\n}\nfunction pack(){\n    setTimeout(()=>{\n        console.log('\u88c5\u7bb1\u7ed3\u675f',new Date());\n    },100);\n}\npick();\ngroundMouth();\nblow();\nPEbag();\npack();<\/pre>\n\n\n\n
\u7ed3\u679c\u8f93\u51fa\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\u88c5\u7bb1\u7ed3\u675f 2018-04-14T07:52:23.230Z\n\u5df2\u5957PE\u888b 2018-04-14T07:52:23.339Z\n\u5439\u6c14\u5b8c\u6210 2018-04-14T07:52:23.437Z\n\u78e8\u53e3\u5b8c\u6210 2018-04-14T07:52:23.532Z\n\u6311\u62e3\u5b8c\u6210 2018-04-14T07:52:23.633Z<\/pre>\n\n\n\n
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function start(){\n    setTimeout(()=>{\n        console.log('\u6311\u62e3\u5b8c\u6210',new Date());\n        setTimeout(()=>{\n            console.log('\u78e8\u53e3\u5b8c\u6210',new Date());\n            setTimeout(()=>{\n                console.log('\u5439\u6c14\u5b8c\u6210',new Date());\n                setTimeout(()=>{\n                    console.log('\u5df2\u5957PE\u888b',new Date());\n                    setTimeout(()=>{\n                        console.log('\u88c5\u7bb1\u7ed3\u675f',new Date());\n                    },100);\n                },200);\n            },300);\n        },400);\n    },500);\n}\nstart();<\/pre>\n\n\n\n
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\u6311\u62e3\u5b8c\u6210 2018-04-14T08:06:54.464Z\n\u78e8\u53e3\u5b8c\u6210 2018-04-14T08:06:54.873Z\n\u5439\u6c14\u5b8c\u6210 2018-04-14T08:06:55.174Z\n\u5df2\u5957PE\u888b 2018-04-14T08:06:55.376Z\n\u88c5\u7bb1\u7ed3\u675f 2018-04-14T08:06:55.477Z\n<\/pre>\n\n\n\n
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<\/pre>\n\n\n\n
function pick(next){\n    setTimeout(()=>{\n        console.log('\u6311\u62e3\u5b8c\u6210',new Date());\n        next();\n    },500);\n}\nfunction groundMouth(next){\n    setTimeout(()=>{\n        console.log('\u78e8\u53e3\u5b8c\u6210',new Date());\n        next();\n    },400);\n}\nfunction blow(next){\n    setTimeout(()=>{\n        console.log('\u5439\u6c14\u5b8c\u6210',new Date());\n        next();\n    },300);\n}\nfunction PEbag(next){\n    setTimeout(()=>{\n        console.log('\u5df2\u5957PE\u888b',new Date());\n        next();\n    },200);\n}\nfunction pack(){\n    setTimeout(()=>{\n        console.log('\u88c5\u7bb1\u7ed3\u675f',new Date());\n    },100);\n}\n\npick(()=>{\n    groundMouth(()=>{\n        blow(()=>{\n            PEbag(()=>{\n                pack();\n            });\n        });\n    });\n});<\/pre>\n\n\n\n
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\u63a5\u4e0b\u6765\u6211\u4eec\u7684promise\u5c31\u8981\u51fa\u573a\u4e86\u3002\u4ed6\u5c06\u63d0\u4f9b\u4e00\u79cd\u66f4\u52a0\u4f18\u96c5\u7684\u65b9\u6cd5\uff0c\u8ba9\u6211\u4eec\u5199\u56de\u8c03\u51fd\u6570<\/p>\n\n\n\n
function pick(){\n    var p=new Promise((resolve,reject)=>{\n        setTimeout(()=>{\n            console.log('\u6311\u62e3\u5b8c\u6210',new Date());\n            resolve();\n        },500);\n    });\n    return p;\n}\nfunction groundMouth(){\n    var p=new Promise((resolve,reject)=>{\n        setTimeout(()=>{\n            console.log('\u78e8\u53e3\u5b8c\u6210',new Date());\n            resolve();\n        },400);\n    });\n    return p;\n}\nfunction blow(){\n    var p=new Promise((resolve,reject)=>{\n        setTimeout(()=>{\n            console.log('\u5439\u6c14\u5b8c\u6210',new Date());\n            resolve();\n        },300);\n    });\n    return p;\n}\nfunction PEbag(){\n    var p=new Promise((resolve,reject)=>{\n        setTimeout(()=>{\n            console.log('\u5df2\u5957PE\u888b',new Date());\n            resolve();\n        },200);\n    });\n    return p;\n}\nfunction pack(){\n    var p=new Promise((resolve,reject)=>{\n        setTimeout(()=>{\n            console.log('\u88c5\u7bb1\u7ed3\u675f',new Date());\n            resolve();\n        },100);\n    });\n    return p;\n}\n\npick()\n.then(function(data){\n    return groundMouth();\n})\n.then(function(data){\n    return blow();\n})\n.then(function(data){\n    return PEbag();\n})\n.then(function(data){\n    return pack();\n})<\/pre>\n\n\n\n
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