momentum.js.html
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<title>Code coverage report for src/util/momentum.js</title>
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<a href="../../index.html">all files</a> / <a href="index.html">src/util/</a> momentum.js
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<span class="strong">93.33% </span>
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<span class="strong">68.75% </span>
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<span class="strong">100% </span>
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<span class="strong">93.33% </span>
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<span class='fraction'>14/15</span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">export function momentum(current, start, time, lowerMargin, upperMargin, wrapperSize, options) {
let distance = current - start
let speed = Math.abs(distance) / time
let {deceleration, itemHeight, swipeBounceTime, wheel, swipeTime} = options
let duration = swipeTime
let rate = wheel ? <span class="branch-0 cbranch-no" title="branch not covered" >4 </span>: 15
let destination = current + speed / deceleration * (distance < 0 ? -1 : 1)
<span class="missing-if-branch" title="if path not taken" >I</span>if (wheel && <span class="branch-1 cbranch-no" title="branch not covered" >itemHeight)</span> {
<span class="cstat-no" title="statement not covered" > destination = Math.round(destination / itemHeight) * itemHeight</span>
}
if (destination < lowerMargin) {
destination = wrapperSize ? Math.max(lowerMargin - wrapperSize / 4, lowerMargin - (wrapperSize / rate * speed)) : <span class="branch-1 cbranch-no" title="branch not covered" >lowerMargin</span>
duration = swipeBounceTime
} else if (destination > upperMargin) {
destination = wrapperSize ? Math.min(upperMargin + wrapperSize / 4, upperMargin + wrapperSize / rate * speed) : <span class="branch-1 cbranch-no" title="branch not covered" >upperMargin</span>
duration = swipeBounceTime
}
return {
destination: Math.round(destination),
duration
}
}
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Code coverage
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