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tick.js
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tick.js
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import { getOptions } from './options.js';
let prevTime = new Date().getTime();
export function setPrevTime(value){
prevTime = value;
}
export function getPrevTime(value){
return prevTime;
}
/**
* Triggers the callback once per scroll wheel action.
* Based on scrolling speed delay.
*/
export const oncePerScroll = (function() {
var canTriggerEvent = true;
var prevWheelTime = new Date().getTime();
var result;
return function(scrollTrigger, callback){
var currentTime = new Date().getTime();
var timeThreshold = scrollTrigger === 'wheel' ? getOptions().scrollingSpeed : 100;
canTriggerEvent = currentTime - prevWheelTime >= timeThreshold;
if(canTriggerEvent){
result = callback();
prevWheelTime = currentTime;
}
return typeof result !== 'undefined' ? result : true;
};
})();