{"id":199782,"date":"2020-11-08T06:05:39","date_gmt":"2020-11-07T22:05:39","guid":{"rendered":"http:\/\/4563.org\/?p=199782"},"modified":"2020-11-08T06:05:39","modified_gmt":"2020-11-07T22:05:39","slug":"vue3-composition-api-%e5%8f%98%e9%87%8f%e7%b1%bb%e5%9e%8b%e6%8e%a8%e6%96%ad%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=199782","title":{"rendered":"vue3 Composition api \u53d8\u91cf\u7c7b\u578b\u63a8\u65ad\u95ee\u9898"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  vue3 Composition api \u53d8\u91cf\u7c7b\u578b\u63a8\u65ad\u95ee\u9898               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : webberone <\/span>  <span><i><\/i> 3<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\">                        \u7528 vue3 + ts \u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u7528 const root = ref(null)\u521b\u5efa\u4e00\u4e2a\u6a21\u677f\u5f15\u7528\uff0c\u7f16\u8bd1\u5668\u4f1a\u63d0\u793a\u521b\u5efa\u51fa\u6765\u7684 root \u7c7b\u578b\u662f Ref(null)\uff0c\u4f46\u662f\u6709\u7684\u9879\u76ee\u63d0\u793a\u7c7b\u578b\u662f Ref(any)\uff0c\u8fd9\u662f\u4ec0\u4e48\u539f\u56e0\u5440      <\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>2<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"4264497\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : 9ki <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             &#8220;`typescript<br \/>export declare function ref&lt;T extends object&gt;(value: T): T extends Ref ? T : Ref&lt;UnwrapRef&lt;T&gt;&gt;;<\/p>\n<p>export declare function ref&lt;T&gt;(value: T): Ref&lt;UnwrapRef&lt;T&gt;&gt;;<\/p>\n<p>export declare function ref&lt;T = any&gt;(): Ref&lt;T | undefined&gt;;<br \/>&#8220;`<br \/>\u4e0a\u9762\u662f vue3 ref \u7684\u7c7b\u578b\u58f0\u660e <br \/>\u5982\u679c\u4f60\u5728 `tsconfig.json` \u5f00\u542f\u4e86 `strictNullChecks ` \u5219 ts \u4f1a\u533a\u5206 null \u548c undefined\uff0c\u5426\u5219\u5219\u4e0d\u533a\u5206\uff0c\u800c\u662f\u5f53\u6210 any \u5904\u7406 <br \/>\u6240\u4ee5\uff1a\u5982\u679c\u4f60\u6ca1\u6709\u5f00\u542f\uff0c\u90a3\u4e48\u4f20\u4e86 null \u5219\u4f1a\u5339\u914d\u5230<br \/> &#8220;` export declare function ref&lt;T extends object&gt;(value: T): T extends Ref ? T : Ref&lt;UnwrapRef&lt;T&gt;&gt;; &#8220;`<\/p>\n<p>\u6240\u4ee5\u6700\u7ec8\u4e3a any                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"4264498\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : webberone <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @9ki \u4e86\u89e3\u4e86\uff0c\u7070\u5e38\u611f\u8c22                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>vue3 Composition &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/199782"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=199782"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/199782\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=199782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=199782"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=199782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}