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49 lines
1.5 KiB
HTML
49 lines
1.5 KiB
HTML
5 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>Double tap</title>
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<meta charset="UTF-8">
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<meta name="date" content="2019-09-25">
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<meta name="author" content="Rita Graca">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link rel="icon" href="">
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<link rel="stylesheet" type="text/css" href="reset.css">
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<link rel="stylesheet" type="text/css" href="style.css">
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<script src="https://hammerjs.github.io/dist/hammer.js"></script>
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</head>
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<body>
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<div id="myElement"></div>
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</body>
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<script>
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var myElement = document.getElementById('myElement');
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// We create a manager object, which is the same as Hammer(), but without the presetted recognizers.
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var mc = new Hammer.Manager(myElement);
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// Tap recognizer with minimal 2 taps
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mc.add( new Hammer.Tap({ event: 'doubletap', taps: 2 }) );
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// Single tap recognizer
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mc.add( new Hammer.Tap({ event: 'singletap' }) );
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// we want to recognize this simulatenous, so a quadrupletap will be detected even while a tap has been recognized.
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mc.get('doubletap').recognizeWith('singletap');
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// we only want to trigger a tap, when we don't have detected a doubletap
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mc.get('singletap').requireFailure('doubletap');
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mc.on("doubletap", function(ev) {
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// myElement.textContent += ev.type +" ";
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var backColor = myElement.style.backgroundImage;
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myElement.style.backgroundImage = backColor === 'linear-gradient(pink, red)' ? "linear-gradient(red, pink)" : "linear-gradient(pink, red)";
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});
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</script>
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</html>
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