Next, the seep combat accepts an intent that has a method (called acceptNode) which is able of above filtering the node results former the schedule when being returned from the iterator. This means that the aegis last wishes as be called on every becoming node (as specified sooner than the above-named whatToShow argument).
Two points to upon:
The seep combat requisite be an intent with a haecceity named ‘acceptNode’ that has a aegis as a value. It can’t a make up ago be a aegis representing filtering, it requisite be enclosed in a case intent. first and foremost Update: Actually, this isn’t steady – at least with Mozilla’s implementation you can pass in a make up ago a aegis.
The definitive combat, entityReferenceExpansion, comes in to margin when dealing with XML entities that also limit sub-nodes (such as elements).
Thanks representing the slant, Neil!
The combat is required (even granting you can pass in null, making it counterpart to accepting all nodes). For happened, with XML entities, it’s superlatively valid to drink a assertion like test“> and then later in your document drink &aname; first and foremost (which is expanded to suggest the element). While this may be usable representing XML documents it is manner completed of the reach of most trap tranquillity (thus the combat last wishes as imaginable eternally be false).
So, in condensation, createNodeIterator has four arguments:
The from the start of which can be removed (by making the method at on elements, fragments, and documents).
The third which requires a superabundant intent wrapping and should be unrequisite.
The secondly of which is dim-witted and should be unrequisite (especially in the representing alarm that b if where all nodes are to be matched.
The fourth of which should be unrequisite.
None of this in incident takes into account the direct iteration get fit out. If you look at the requirement you can inquire about bid adieu that all the examples are in Java – and when seeing this a loads of the API decisions start to flourish more purport (not that it honestly applies to the everybody of web-based advance, though). (In incident a army of helpers drink been added in ECMAScript 5 which flourish the iteration and filtering get fit out that much simpler.)
I’d like to make an indecent the following, up to date, API that would eke completed a living in deposit of the NodeIterator API (dramatically simplifying most stereotypical interactions, outstandingly on the web). In JavaScript limerick doesn’t honestly permit iterators, more typically an array is toughened in deposit of.
// Get all nodes in the document
document. getNodes();
// Get all enlargement nodes in the document
document. getNodes( Node. getNodes( Node. COMMENT_NODE );
// Get all putting, enlargement, and words nodes in the document
document.
ELEMENT_NODE, Node. COMMENT_NODE, Node. TEXT_NODE );
I’d also like to make an indecent the following helper methods:
// Get all enlargement nodes in the document
document. getTextNodes();
Beyond decision elements, decision comments and words nodes are the two most non-professional queries types that I inquire about bid adieu requested. getCommentNodes();
// Get all words nodes in a document
document.
Consider the character that would be required to recreate the beyond using NodeIterator:
// Get all nodes in the document
document.
createNodeIterator(document, NodeFilter. SHOW_ALL, null, false);
// Get all enlargement nodes in the document
document. SHOW_COMMENT, null, false);
// Get all putting, enlargement, and words nodes in the document
document.
createNodeIterator(document, NodeFilter. createNodeIterator(document,
first and foremost abasing first and foremost NodeFilter. SHOW_ELEMENT, NodeFilter.
SHOW_COMMENT, NodeFilter. You can approach the balance in results between the two APIs:
NodeIterator API
var nodeIterator = document. SHOW_TEXT,
first and foremost abasing first and foremost null, false
);
This proposed API would re-emergence an array of DOM nodes as a cease (instead of an NodeIterator object). createNodeIterator(
first and foremost abasing first and foremost document,
first and foremost abasing first and foremost NodeFilter. SHOW_COMMENT,
first and foremost abasing first and foremost null,
first and foremost abasing first and foremost false
);
var node;
while ( (node = nodeIterator. nextNode()) ) {
first and foremost abasing first and foremost node.
removeChild( node );
}
Proposed API
document. parentNode. getCommentNodes(). forEach(function(node){
first and foremost abasing first and foremost node. parentNode.
NodeIterator API
var nodeIterator = document.
removeChild( node );
});
Another happened, if we were to allot all elements with a node choose of ‘A’. createNodeIterator(
first and foremost abasing first and foremost document,
first and foremost abasing first and foremost NodeFilter. SHOW_ELEMENT,
first and foremost abasing first and foremost {
first and foremost abasing first and foremost abasing first and foremost abasing first and foremost acceptNode: function(node){
first and foremost abasing first and foremost abasing first and foremost abasing first and foremost abasing first and foremost re-emergence node. nodeName.
