code-differently · nsatinover · Jan 26, 2021
diff --git a/getPicture.js b/getPicture.js
@@ -0,0 +1,40 @@
+
+//GetPicture_OnClick();
+
+function GetPicture_OnClick() {
+    const emptyDiv = document.getElementById('emptyDiv');
+    const dogURL = `https://picsum.photos/400`;
+    const proxy = 'https://cors-anywhere.herokuapp.com/';
+    const xhr = new XMLHttpRequest();
+
+    emptyDiv.innerHTML = "";
+
+    xhr.open('GET', proxy + dogURL, true);
+    xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
+
+    xhr.onreadystatechange = function () {
+        if (xhr.readyState === 4) {
+
+            console.log('status 4');
+
+            if (xhr.status === 200) {
+
+                console.log('status 200');
+
+                const dogImage = document.createElement("img");
+                dogImage.src = xhr.responseURL;
+                emptyDiv.appendChild(dogImage);
+
+            }
+        }
+        else if (xhr.status === 499) {
+            console.log('... waiting for thumbnail');
+            retryAfter5s(); // implementation of retry loop is not important there
+        }
+        else {
+            console.log('Image not found');
+        }
+    };
+
+    xhr.send();
+}
diff --git a/index.html b/index.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div id="main">
+        <h2>Image Will Appear Below</h2>
+        <button type="submit" onclick="GetPicture_OnClick()">Get Picture</button>
+        <div id="emptyDiv">
+        </div>
+    </div>
+
+    <script src="getPicture.js"></script>
+</body>
+</html>
diff --git a/schools.js b/schools.js
@@ -0,0 +1,21 @@
+const xmlhttp = new XMLHttpRequest();
+const url = "https://dog.ceo/api/breeds/image/random";
+
+xmlhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+        const returnArr = JSON.parse(this.responseText);
+        ParseImage(returnArr);
+    }
+};
+xmlhttp.open("GET", url, true);
+xmlhttp.send();
+
+function ParseImage(arr) {
+    const out = "";
+    let i;
+    for(i = 0; i < arr.length; i++) {
+        out += '<img src="' + arr[i].url + '">' +
+        arr[i].display + '</img><br>';
+    }
+    document.getElementById("emptyDiv").innerHTML = out;
+}