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96 lines
3.1 KiB
96 lines
3.1 KiB
<!doctype html> |
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<html> |
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<head> |
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<meta charset="utf-8"> |
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<meta http-equiv="X-UA-Compatible" content="IE=edge"> |
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<meta name="viewport" content="width=device-width, initial-scale=1"> |
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<title>My Learning Website</title> |
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<link href="/styles/styles.css" rel="stylesheet" type="text/css"> |
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<link href="/webdevelopment/styles/styles.css" rel="stylesheet" type="text/css"> |
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<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> |
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<![endif]--> |
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</head> |
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<body> |
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<h1 class="courselink">JavaScript Essential Training</h1> |
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<h2 class="lecturer">LinkedIn Learning : Morten Rand-Hendriksen</h2> |
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<h1 class="episodetitle">Code Samples</h1> |
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<article> |
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<h2 class="sectiontitle">Code Sample 1</h2> |
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<p>This is the JavaScript code for 08_10 in the exercise files. </p> |
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<h2 class="sectiontitle">Callback Function</h2> |
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<pre class="codesample"> |
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/** |
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* Using a callback function. |
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* @link https://developer.mozilla.org/en-US/docs/Glossary/Callback_function |
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*/ |
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// Helper function to format currency numbers. Used by tipCalculator |
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const formatter = (locale = "en-US", currency = "USD", value) => { |
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let formattedValue = new Intl.NumberFormat(locale, { |
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style: "currency", |
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currency: currency, |
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}).format(value); |
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return formattedValue; |
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}; |
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// Callback receives finalTip object, creates and outputs table on the DOM. |
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const printHTML = (finalTip) => { |
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const tipTable = document.createElement("table"); |
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tipTable.innerHTML = ` |
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<tr> |
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<td>Sum before tip:</td> |
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<td>${finalTip.sum}</td> |
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</tr> |
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<tr> |
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<td>Tip percentage:</td> |
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<td>${finalTip.percentage}</td> |
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</tr> |
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<tr> |
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<td>Tip:</td> |
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<td>${finalTip.tip}</td> |
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</tr> |
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<tr> |
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<td>Total:</td> |
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<td>${finalTip.total}</td> |
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</tr> |
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`; |
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document.querySelector("main").append(tipTable); |
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}; |
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// Create a finalTip object with all the data. Send it to the printHTML callback. |
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const tipCalculator = (sum, percentage, locale, currency) => { |
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let tip = sum * (percentage / 100); |
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let total = sum + tip; |
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const finalTip = { |
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sum: formatter(locale, currency, sum), |
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percentage: percentage + "%", |
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tip: formatter(locale, currency, tip), |
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total: formatter(locale, currency, total), |
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}; |
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}; |
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tipCalculator(29.95, 18, "de-DE", "EUR");</pre> |
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</article> |
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<div class="btngroup"> |
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<button class="button" onclick="window.location.href='javascriptessentialtraining2021.html'"> |
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Course Contents |
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</button> |
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<button class="button" onclick="window.location.href='/webdevelopment/webdevelopment.html'"> |
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Web Development Page |
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</button> |
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<button class="button" onclick="window.location.href='/index.html'"> |
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Home |
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</button> |
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</div> |
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</body> |
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</html> |