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esdispatch
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Readme
Trigger events based on esquery selectors during a traversal of a SpiderMonkey format AST.
npm install --save esdispatch
var counter = 0, dispatcher = new ESDispatcher;
dispatcher.on(
'UpdateExpression[operator="++"] > Identifier[name=i]',
function(node, ancestors) { ++counter; }
);
dispatcher.observe(spidermonkeyAST, function() {
counter; // 4
});
new ESDispatcher
→ ESDispatcher instanceThe ESDispatcher constructor takes no arguments.
ESDispatcher::addListener(selector, listener)
→ voidInvoke listener
whenever esdispatch walks over a node that matches
selector
. listener
is given two arguments: the node that matched the
selector, and a list containing the ancestors of that node. listener
may also
be an object containing an enter
and, optionally, a leave
function. In that
case, the enter
function will be called in pre-order, and the leave
function will be called in post-order. Aliased as ESDispatcher::on
.
ESDispatcher::once(selector, listener)
→ voidAdds a listener that is invoked only the first time selector
matches.
ESDispatcher::observe(ast, onFinished)
→ voidBegin a traversal using the given SpiderMonkey AST, triggering any listeners
associated with matching queries. onFinished
, if given, is called with no
arguments once the traversal is completed.
FAQs
trigger events based on esquery selectors during a traversal of a SpiderMonkey format AST
The npm package esdispatch receives a total of 4 weekly downloads. As such, esdispatch popularity was classified as not popular.
We found that esdispatch demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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