class dom::MutationObserver

sys::Obj
  dom::MutationObserver

@Js

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MutationObserver invokes a callback when DOM modifications occur.

disconnect

This disconnect()

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Disconnect this observer from receiving DOM mutation events.

make

new make(|MutationRec[]| callback)

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Constructor.

observe

This observe(Elem target, Str:Obj opts)

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Register to receive DOM mutation events for given node. At least one option is required:

• "childList": true to observe node additions and removals on target (including text nodes)
• "attrs": true to observe target attribute mutations
• "charData": true to observe target data mutation
• "subtree": true to observe target and target's descendant mutations
• "attrOldVal": true to capture attribute value before mutation (requires "attrs":'true')
• "charDataOldVal": true to capture target's data before mutation (requires "charData":'true')
• "attrFilter": Str[] whitelist of attribute names to observe (requires "attrs":'true')

takeRecs

MutationRec[] takeRecs()

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Empties this observers's record queue and returns what was in there.