SVGStringList | Web API

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SVG string list interface
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方法
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SVG string list interface

SVGStringList defines a list of DOMString 对象。

An SVGStringList object can be designated as read only, which means that attempts to modify the object will result in an exception being thrown.

Interface overview

Also implement	None
方法	`void clear()` `DOMString` `initialize(in DOMString newItem )` `DOMString` `getItem(in unsigned long index )` `DOMString` `insertItemBefore(in DOMString newItem , in unsigned long index )` `DOMString` `replaceItem(in DOMString newItem , in unsigned long index )` `DOMString` `removeItem(in unsigned long index )` `DOMString` `appendItem(in DOMString newItem )`
特性	readonly unsigned long `numberOfItems` readonly unsigned long `length`
Normative document	SVG 1.1 (2nd Edition)

特性

名称	类型	描述
`numberOfItems`	`unsigned long`	The number of items in the list.
`length`	`unsigned long`	A mirror of the value in `numberOfItems` , for consistency with other interfaces.

方法

Name & Arguments	返回	描述
`clear ()`	void	Clears all existing current items from the list, with the result being an empty list. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only.
`initialize (in DOMString newItem )`	`DOMString`	Clears all existing current items from the list and re-initializes the list to hold the single item specified by the parameter. If the inserted item is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. The return value is the item inserted into the list. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only.
`getItem (in unsigned long index )`	`DOMString`	Returns the specified item from the list. The returned item is the item itself and not a copy. Any changes made to the item are immediately reflected in the list. The first item is number 0. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only.
`insertItemBefore (in DOMString newItem , in unsigned long index )`	`DOMString`	Inserts a new item into the list at the specified position. The first item is number 0. If `newItem` is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. If the item is already in this list, note that the index of the item to insert before is before the removal of the item. If the `index` is equal to 0, then the new item is inserted at the front of the list. If the index is greater than or equal to `numberOfItems` , then the new item is appended to the end of the list. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only.
`replaceItem (in DOMString newItem , in unsigned long index )`	`DOMString`	Replaces an existing item in the list with a new item. If `newItem` is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. If the item is already in this list, note that the index of the item to replace is before the removal of the item. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only. a `DOMException` with code `INDEX_SIZE_ERR` is raised if the index number is greater than or equal to `numberOfItems` .
`removeItem (in unsigned long index )`	`DOMString`	Removes an existing item from the list. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only. a `DOMException` with code `INDEX_SIZE_ERR` is raised if the index number is greater than or equal to `numberOfItems` .
`appendItem (in DOMString newItem )`	`DOMString`	Inserts a new item at the end of the list. If `newItem` is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. Exceptions: a `DOMException` with code `NO_MODIFICATION_ALLOWED_ERR` is raised when the list corresponds to a read only attribute or when the object itself is read only.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SVGStringList`	Chrome Yes	Edge 12	Firefox 12 12 Since version 13, `SVGStringList` is indexable like Array which is a non-standard behavior.	IE 9	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 14 14 `SVGStringList` is indexable like Array which is a non-standard behavior.	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`length` 非标	Chrome Yes	Edge ≤79	Firefox 13	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android 14	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes

图例

完整支持
兼容性未知 ?
非标。预期跨浏览器支持较差。

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SVG string list interface

Interface overview

特性

方法

浏览器兼容性

图例

相关话题