ion-back-button
单击后退按钮可在应用的历史记录中导航回来。仅当导航堆栈中有历史记录时才显示，除非设置了 defaultHref。后退按钮根据模式显示不同的文本和图标，但这可以自定义。
¥The back button navigates back in the app's history when clicked. It is only displayed when there is history in the navigation stack, unless defaultHref is set. The back button displays different text and icon based on the mode, but this can be customized.
基本用法
¥Basic Usage
自定义后退按钮
¥Custom Back Button
默认情况下，后退按钮将显示文本 "Back"，在 ios 上显示 "chevron-back" 图标，在 md 上显示 "arrow-back-sharp" 图标。可以通过设置 icon 或 text 属性来自定义每个后退按钮组件。或者，可以使用全局配置中的 backButtonIcon 或 backButtonText 属性进行全局设置。请参阅 配置文档 了解更多信息。
¥By default, the back button will display the text "Back" with a "chevron-back" icon on ios, and an "arrow-back-sharp" icon on md. This can be customized per back button component by setting the icon or text properties. Alternatively, it can be set globally using the backButtonIcon or backButtonText properties in the global config. See the Config docs for more information.
默认返回历史记录
¥Default Back History
有时，应用可能需要显示后退按钮并在没有历史记录时导航回来。这可以通过将后退按钮上的 defaultHref 设置为路径来完成。为了使用 defaultHref，应用必须包含已设置路径的路由。
¥Occasionally an app may need to show the back button and navigate back when there is no history. This can be done by setting the defaultHref on the back button to a path. In order to use defaultHref, the app must contain a router with paths set.
属性
¥Properties
color
| Description | The color to use from your application's color palette. Default options are: "primary", "secondary", "tertiary", "success", "warning", "danger", "light", "medium", and "dark". For more information on colors, see theming. |
| Attribute | color |
| Type | "danger" ｜ "dark" ｜ "light" ｜ "medium" ｜ "primary" ｜ "secondary" ｜ "success" ｜ "tertiary" ｜ "warning" ｜ string ｜ undefined |
| Default | undefined |
defaultHref
| Description | The url to navigate back to by default when there is no history. |
| Attribute | default-href |
| Type | string ｜ undefined |
| Default | undefined |
disabled
| Description | If true, the user cannot interact with the button. |
| Attribute | disabled |
| Type | boolean |
| Default | false |
icon
| Description | The built-in named SVG icon name or the exact src of an SVG file to use for the back button. |
| Attribute | icon |
| Type | null ｜ string ｜ undefined |
| Default | undefined |
mode
| Description | The mode determines which platform styles to use. |
| Attribute | mode |
| Type | "ios" ｜ "md" |
| Default | undefined |
routerAnimation
| Description | When using a router, it specifies the transition animation when navigating to another page. |
| Attribute | undefined |
| Type | ((baseEl: any, opts?: any) => Animation) ｜ undefined |
| Default | undefined |
text
| Description | The text to display in the back button. |
| Attribute | text |
| Type | null ｜ string ｜ undefined |
| Default | undefined |
type
| Description | The type of the button. |
| Attribute | type |
| Type | "button" ｜ "reset" ｜ "submit" |
| Default | 'button' |
事件
¥Events
No events available for this component.
方法
¥Methods
No public methods available for this component.
CSS 阴影部分
¥CSS Shadow Parts
| Name | Description |
|---|---|
icon | The back button icon (uses ion-icon). |
native | The native HTML button element that wraps all child elements. |
text | The back button text. |
CSS 自定义属性
¥CSS Custom Properties
| Name | Description |
|---|---|
--background | Background of the button |
--background-focused | Background of the button when focused with the tab key |
--background-focused-opacity | Opacity of the button background when focused with the tab key |
--background-hover | Background of the button on hover |
--background-hover-opacity | Opacity of the background on hover |
--border-radius | Border radius of the button |
--color | Text color of the button |
--color-focused | Text color of the button when focused with the tab key |
--color-hover | Text color of the button on hover |
--icon-font-size | Font size of the button icon |
--icon-font-weight | Font weight of the button icon |
--icon-margin-bottom | Bottom margin of the button icon |
--icon-margin-end | Right margin if direction is left-to-right, and left margin if direction is right-to-left of the button icon |
--icon-margin-start | Left margin if direction is left-to-right, and right margin if direction is right-to-left of the button icon |
--icon-margin-top | Top margin of the button icon |
--icon-padding-bottom | Bottom padding of the button icon |
--icon-padding-end | Right padding if direction is left-to-right, and left padding if direction is right-to-left of the button icon |
--icon-padding-start | Left padding if direction is left-to-right, and right padding if direction is right-to-left of the button icon |
--icon-padding-top | Top padding of the button icon |
--margin-bottom | Bottom margin of the button |
--margin-end | Right margin if direction is left-to-right, and left margin if direction is right-to-left of the button |
--margin-start | Left margin if direction is left-to-right, and right margin if direction is right-to-left of the button |
--margin-top | Top margin of the button |
--min-height | Minimum height of the button |
--min-width | Minimum width of the button |
--opacity | Opacity of the button |
--padding-bottom | Bottom padding of the button |
--padding-end | Right padding if direction is left-to-right, and left padding if direction is right-to-left of the button |
--padding-start | Left padding if direction is left-to-right, and right padding if direction is right-to-left of the button |
--padding-top | Top padding of the button |
--ripple-color | Color of the button ripple effect |
--transition | Transition of the button |
插槽
¥Slots
No slots available for this component.