<header>
<h2 class="title">Object.prototype.toString()</h2>
<p class="description">Визначає точний тип об'єкта в JavaScript</p>
</header>
<main>
<div class="result">
<select id="dataTypeSelector">
<option value="[]">Масив</option>
<option value="new Date()">Дата</option>
<option value="{}">Об'єкт</option>
</select>
<button onclick="detectType()">Визначити тип</button>
<p id="output"></p>
</div>
</main>
body {
font-size: 16px;
line-height: 1.5;
font-family: monospace;
}
header {
background-color: #f1f1f1;
margin-bottom: 25px;
padding: 15px;
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}
header h2.title {
padding-bottom: 15px;
border-bottom: 1px solid #999;
}
header p.description {
font-style: italic;
color: #222;
}
.result {
background-color: #f8f8f8;
padding: 15px;
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}
#dataTypeSelector {
margin-right: 10px;
}
function detectType() {
const selector = document.getElementById('dataTypeSelector');
const selectedValue = new Function(`return ${selector.value}`)();
const type = Object.prototype.toString.call(selectedValue).slice(8, -1);
document.getElementById('output').textContent = `Обраний тип: ${type}`;
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.