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four layers carry it: the page's envelope, the driver's unwrap, the runner's count check and the verifier's decode. each has a unit test and only a run proves they compose. goes red both ways, decoding an absent value as null and dropping the envelope.
19 lines
592 B
HTML
19 lines
592 B
HTML
<!doctype html>
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<html>
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<body>
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<!-- One control and one counter. The spec's other two extractors look for
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ids that are not here, which is the shape a route-scoped extractor has
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on every step it is off its own screen. -->
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<div id="app">
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<button id="go" style="width:200px;height:80px">go</button>
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<div id="count">0</div>
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</div>
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<script>
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let taps = 0;
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document.getElementById("go").addEventListener("click", function () {
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document.getElementById("count").textContent = String(++taps);
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});
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</script>
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</body>
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</html>
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