37 lines
900 B
JavaScript
37 lines
900 B
JavaScript
module.exports = {
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setDispatch,
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dispatch,
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dispatcher
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}
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// Memoize most of our event handlers, which are functions in the form
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// () => dispatch(<args>)
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// ... this prevents virtual-dom from updating every listener on every update()
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var _dispatchers = {}
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var _dispatch = () => {}
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function setDispatch (dispatch) {
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_dispatch = dispatch
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}
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// Get a _memoized event handler that calls dispatch()
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// All args must be JSON-able
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function dispatcher (...args) {
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var json = JSON.stringify(args)
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var handler = _dispatchers[json]
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if (!handler) {
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_dispatchers[json] = (e) => {
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// Don't click on whatever is below the button
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e.stopPropagation()
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// Don't regisiter clicks on disabled buttons
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if (e.target.classList.contains('disabled')) return
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_dispatch.apply(null, args)
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}
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}
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return handler
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}
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function dispatch (...args) {
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_dispatch.apply(null, args)
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}
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