Ajax

Ajax is the static HTTP-request utility class of maptalks. It wraps common network requests such as get/post/getJSON/getArrayBuffer/getImage/jsonp. It is never instantiated — every method is called on the class itself — and is used to load tiles, GeoJSON data, images, and other remote resources.

import { Ajax } from "maptalks";

Ajax.getJSON("https://example.com/data.json", (json) => {
  console.log(json);
});

Ajax.get("https://example.com/data.txt", { mimeType: "text/plain" }, (text) => {
  console.log(text);
});

Constructor

None. Ajax is a purely static utility class and cannot be instantiated.

options

No independent configuration options. Each method accepts request options (such as mimeType, timeout, headers) via its options argument.

Methods

• Ajax.get(url, options?, cb?) — Issue a GET request; options is optional request config and cb an optional callback receiving the response.
• Ajax.post(url, options?, cb?) — Issue a POST request; options may contain the data to submit, cb an optional callback.
• Ajax.getJSON(url, options?, cb?) — Issue a GET request and parse the JSON result; cb receives the parsed data.
• Ajax.getArrayBuffer(url, options?, cb?) — Issue a GET request and get the response as an ArrayBuffer, for binary data.
• Ajax.getImage(img, url, options?) — Load the image at url into the given img (an HTMLImageElement); the image's onload/onerror fire on success or failure.
• Ajax.jsonp(url, callback) — Issue a JSONP request with callback as the global callback, for cross-origin data retrieval.

Static Methods

Ajax methods are themselves static (see the Methods above).

Events

None.