bootstrap之popover插件使用

bootstrap可以说是后台管理前端的一个很不错的框架，应用也特别广泛，但笔者认为bootstrap的一些开发文档却不是很足，有时查个东西得找半天。

一般情况下，开源软件的官网是资料最全主要是准确的地方，下面直接进入bootstrap的主页：

要看popover插件的js代码就需要进入JavaScript页面查找，下面是popover的一段内容：

$('#example').popover(options)

配置参数：

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-animation="".

Name	Type	Default	Description
animation	boolean	true	Apply a CSS fade transition to the popover
container	string \| false	false	Appends the popover to a specific element. Example: `container: 'body'`. This option is particularly useful in that it allows you to position the popover in the flow of the document near the triggering element - which will prevent the popover from floating away from the triggering element during a window resize.
content	string \| function	''	Default content value if `data-content` attribute isn't present. If a function is given, it will be called with its `this` reference set to the element that the popover is attached to.
delay	number \| object	0	Delay showing and hiding the popover (ms) - does not apply to manual trigger type If a number is supplied, delay is applied to both hide/show Object structure is: `delay: { "show": 500, "hide": 100 }`
html	boolean	false	Insert HTML into the popover. If false, jQuery's `text` method will be used to insert content into the DOM. Use text if you're worried about XSS attacks.
placement	string \| function	'right'	How to position the popover - top \| bottom \| left \| right \| auto. When "auto" is specified, it will dynamically reorient the popover. For example, if placement is "auto left", the popover will display to the left when possible, otherwise it will display right. When a function is used to determine the placement, it is called with the popover DOM node as its first argument and the triggering element DOM node as its second. The `this` context is set to the popover instance.
selector	string	false	If a selector is provided, popover objects will be delegated to the specified targets. In practice, this is used to enable dynamic HTML content to have popovers added. See this and an informative example.
template	string	`'<div class="popover" role="tooltip"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'`	Base HTML to use when creating the popover. The popover's `title` will be injected into the `.popover-title`. The popover's `content` will be injected into the `.popover-content`. `.arrow` will become the popover's arrow. The outermost wrapper element should have the `.popover` class.
title	string \| function	''	Default title value if `title` attribute isn't present. If a function is given, it will be called with its `this` reference set to the element that the popover is attached to.
trigger	string	'click'	How popover is triggered - click \| hover \| focus \| manual. You may pass multiple triggers; separate them with a space. `manual` cannot be combined with any other trigger.
viewport	string \| object \| function	{ selector: 'body', padding: 0 }	Keeps the popover within the bounds of this element. Example: `viewport: '#viewport'` or `{ "selector": "#viewport", "padding": 0 }` If a function is given, it is called with the triggering element DOM node as its only argument. The `this` context is set to the popover instance.

Data attributes for individual popovers

Options for individual popovers can alternatively be specified through the use of data attributes, as explained above.

Methods

`$().popover(options)`

Initializes popovers for an element collection.

`.popover('show')`

Reveals an element's popover. Returns to the caller before the popover has actually been shown (i.e. before the shown.bs.popover event occurs). This is considered a "manual" triggering of the popover. Popovers whose both title and content are zero-length are never displayed.

$('#element').popover('show')

`.popover('hide')`

Hides an element's popover. Returns to the caller before the popover has actually been hidden (i.e. before the hidden.bs.popover event occurs). This is considered a "manual" triggering of the popover.

$('#element').popover('hide')

`.popover('toggle')`

Toggles an element's popover. Returns to the caller before the popover has actually been shown or hidden (i.e. before the shown.bs.popover or hidden.bs.popover event occurs). This is considered a "manual" triggering of the popover.

$('#element').popover('toggle')

`.popover('destroy')`

Hides and destroys an element's popover. Popovers that use delegation (which are created using the selector option) cannot be individually destroyed on descendant trigger elements.

$('#element').popover('destroy')

Events

Event Type	Description
show.bs.popover	This event fires immediately when the `show` instance method is called.
shown.bs.popover	This event is fired when the popover has been made visible to the user (will wait for CSS transitions to complete).
hide.bs.popover	This event is fired immediately when the `hide` instance method has been called.
hidden.bs.popover	This event is fired when the popover has finished being hidden from the user (will wait for CSS transitions to complete).
inserted.bs.popover	This event is fired after the `show.bs.popover` event when the popover template has been added to the DOM.

$('#myPopover').on('hidden.bs.popover', function () {// do something…
})

下面给出笔者的应用场景：

popover弹出内容为html，而不是普通文本，但是这样要确保html内容不含有xss攻击代码

<div class="formula-hint" title="提示"
data-container="body" data-toggle="popover" data-placement="top"
data-content="<div>xxxxx</div><div>xxxxx</div>">

</div>

$("#element").popover({
placement:"top",
html:true
});

$("#element").popover("show");

这样就可以在popover显示html内容，比普通文本显示更丰富些