1.5 KiB
1.5 KiB
About
Postman delivers the assets of a web page. The library is typically paired with a progress bar that reports progress to the client.
Examples
Progress bar
The following example delivers fonts, scripts, images and stylesheets with the help of a progress bar. The progress bar is removed once the delivery is complete:
index.html
<!DOCTYPE html>
<head>
<title>Postman</title>
<script type="module" src="/postman.js"></script>
</head>
<body>
<div class="postman loader">
<progress value="0" max="100"></progress>
<span class="percentage"></span>
</div>
</div>
</body>
</html>
postman.js
import postman, { item } from "postman";
const progressBar = document.querySelector("progress")
const span = document.querySelector(".percentage");
postman(
item.font("Kanit Regular", "url(/fonts/kanit-regular.ttf)"),
item.script("/js/app.js"),
item.image("/images/app.png"),
item.css("/css/app.css"),
item.progress((percent) => {
progressBar.value = percent;
span.innerText = `${percent}%`;
})
).fetch()
.then((package) => {
/* Add page assets */
package.fonts.forEach((font) => documents.fonts.add(font));
package.scripts.forEach((script) => document.body.appendChild(script));
package.css.forEach((css) => document.head.appendChild(css));
/* Replace progress bar */
progressBar.remove();
span.remove();
})