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QuerySelector.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Query Selectors</title>
</head>
<body>
<div>Open the console log.</div>
<div id="main">
<div class="pictureContainer">
<img class="theimage" src="http://placekitten.com.s3.amazonaws.com/homepage-samples/96/139.jpg" />
</div>
<div class="pictureContainer">
<img class="theimage" src="http://placekitten.com.s3.amazonaws.com/homepage-samples/200/139.jpg" />
</div>
<div class="pictureContainer">
<img class="theimage" src="http://placekitten.com.s3.amazonaws.com/homepage-samples/200/140.jpg" />
</div>
<div class="pictureContainer">
<img class="theimage" src="http://placekitten.com.s3.amazonaws.com/homepage-samples/200/286.jpg" width="100%" />
</div>
</div>
<script>
// https://www.kirupa.com/html5/finding_elements_dom_using_querySelector.htm
// Tt Really is the CSS Selector Syntax
const main = document.querySelector("#main"); // Get by id
console.log(main);
// Returns a node list (like an array but not really)
let images = document.querySelectorAll(".theimage"); // Get by class
console.log(images);
images.forEach(i => console.log(i.src));
for (var i = 0; i < images.length; i++) {
var image = images[i];
console.log(image.getAttribute("src"));
}
images = document.querySelectorAll("img[width='100%']"); // element with attribute selector
console.log("100%: " + images[0].src);
// Query starting at specific node
const nodes = main.querySelectorAll("img");
console.log(nodes);
</script>
</body>
</html>