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219.b99343b6.js

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非 Prop 的 Attribute")]),t._v(" "),s("p",[s("a",{attrs:{href:"https://cn.vuejs.org/v2/guide/components-props.html#%E9%9D%9E-Prop-%E7%9A%84-Attribute",target:"_blank",rel:"noopener noreferrer"}},[t._v("API"),s("OutboundLink")],1)]),t._v(" "),s("p",[t._v("当子组件没有定义对应的Prop来接收父组件传来的值时，这个值将会出现在组件根元素的"),s("code",[t._v("Attribute")]),t._v("上面。")]),t._v(" "),s("h3",{attrs:{id:"用处"}},[s("a",{staticClass:"header-anchor",attrs:{href:"#用处"}},[t._v("#")]),t._v(" 用处")]),t._v(" "),s("p",[t._v("例如，想象一下你通过一个 Bootstrap 插件使用了一个第三方的 "),s("code",[t._v("<bootstrap-date-input>")]),t._v(" 组件，这个插件需要在其 "),s("code",[t._v("<input>")]),t._v(" 上用到一个 "),s("code",[t._v("data-date-picker")]),t._v(" attribute。我们可以将这个 attribute 添加到你的组件实例上：")]),t._v(" "),s("div",{staticClass:"language-html line-numbers-mode"},[s("pre",{pre:!0,attrs:{class:"language-html"}},[s("code",[s("span",{pre:!0,attrs:{class:"token tag"}},[s("span",{pre:!0,attrs:{class:"token tag"}},[s("span",{pre:!0,attrs:{class:"token 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    2.