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javascript - What is the difference between these two ways of binding custom events? Which one is better?
javascript - What is the difference between these two ways of binding custom events? Which one is better?
The first way is to store custom events directly in __onfireEvents
<code>var __onfireEvents = {};
function _bind(eventName, callback, is_one, context) {
if (typeof eventName !== string_str || typeof callback !== function_str) {
throw new Error('args: '+string_str+', '+function_str+'');
}
if (! hasOwnKey(__onfireEvents, eventName)) {
__onfireEvents[eventName] = {};
}
__onfireEvents[eventName][++__cnt] = [callback, is_one, context];
return [eventName, __cnt];
}
function on(eventName, callback, context) {
return _bind(eventName, callback, 0, context);
}
</code>The second way is to store custom events, but the difference is that they are bound to elements. Is it necessary? Are there any advantages here?
<code>$customSubMap = {};
subscribeEvent = function ( $collection, event_name, fn ) {
$collection.on( event_name, fn );
if ( ! $customSubMap[ event_name ] ) {
$customSubMap[ event_name ] = $collection;
}
else {
$customSubMap[ event_name ]
= $customSubMap[ event_name ].add( $collection );
}
};</code>Reply content:
The first way is to store custom events directly in __onfireEvents
<code>var __onfireEvents = {};
function _bind(eventName, callback, is_one, context) {
if (typeof eventName !== string_str || typeof callback !== function_str) {
throw new Error('args: '+string_str+', '+function_str+'');
}
if (! hasOwnKey(__onfireEvents, eventName)) {
__onfireEvents[eventName] = {};
}
__onfireEvents[eventName][++__cnt] = [callback, is_one, context];
return [eventName, __cnt];
}
function on(eventName, callback, context) {
return _bind(eventName, callback, 0, context);
}
</code>The second way is to store the custom event, but the difference is that it is bound to the element. Is it necessary? Are there any advantages here?
<code>$customSubMap = {};
subscribeEvent = function ( $collection, event_name, fn ) {
$collection.on( event_name, fn );
if ( ! $customSubMap[ event_name ] ) {
$customSubMap[ event_name ] = $collection;
}
else {
$customSubMap[ event_name ]
= $customSubMap[ event_name ].add( $collection );
}
};</code>
It seems that the second one is more readable.
Actually, I think there is essentially no difference between the two, just like the relationship between products and categories. You can say {Product1:[Category1, Category2]} or {Category1: [Product1, Product2]}
My personal feeling is second
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