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OFFLINE")]),s._v("\n枚举和数组使用方式差不多"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 可以使用下标方式取值\nStatus"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("===")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token constant"}},[s._v("OFFLINE")]),s._v("\nStatus"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("===")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token constant"}},[s._v("ONLINE")]),s._v("\nStatus"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token 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punctuation"}},[s._v(".")]),s._v("d"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("ts 文件\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2.")]),s._v(" 在 "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("d"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("ts 文件中使用 declare 关键字定义全局变量或函数或对象\n    declare "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("var")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function-variable function"}},[s._v("$")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token function-variable function"}},[s._v("param")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" 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