createFragment 方法
- String? html,
- {NodeValidator? validator,
- NodeTreeSanitizer? treeSanitizer}
override
从 HTML 片段创建 DocumentFragment 并确保其遵循由 validator 或 treeSanitizer 指定的清理规则。
如果默认验证行为过于严格,则应创建一个新的 NodeValidator,要么扩展默认验证器,要么将其包装并覆盖验证 API。
treeSanitizer 用于遍历生成的节点树并进行清理。也可以提供一个自定义的 treeSanitizer 来执行特殊的验证规则,但由于该 API 实现较为复杂,不推荐这样做。
返回的树保证仅包含由提供的 validator 允许的节点和属性。
另请参阅
实现
DocumentFragment createFragment(String? html,
{NodeValidator? validator, NodeTreeSanitizer? treeSanitizer}) {
if (Range.supportsCreateContextualFragment) {
return super.createFragment(html,
validator: validator, treeSanitizer: treeSanitizer);
}
// IE9 workaround which does not support innerHTML on Table elements.
var fragment = new DocumentFragment();
var section = new TableElement()
.createFragment(html,
validator: validator, treeSanitizer: treeSanitizer)
.nodes
.single;
fragment.nodes.addAll(section.nodes);
return fragment;
}