Incorporating TypeScript with jQuery for efficient AJAX operations

I recently added jQuery typings to my TypeScript project. I am able to type $.ajax(...) without encountering any compile errors in VS Code. However, when I test it on localhost, I receive an error stating that "$ is not defined." In an attempt to address this issue, I tried importing jQuery using the following syntax:

 import * as jQuery from "jquery"

I followed a similar method to import express, and it worked successfully.

In VS Code, when I begin typing "jquery.", the editor suggests "ajax" as a method, indicating recognition of my import. Despite this, upon testing on localhost again, I am informed that jquery.ajax is not a function.

This is how I structured my test ajax call:

jquery.ajax("test.html", {
            success: function () {
                alert("success");
            },
            error: function () {
                alert("error");
            }
        });

How can one properly execute an ajax call with jQuery in TypeScript?

Answer №1

Typings in TypeScript help define which methods are safe to use with a specific JavaScript file that is not written in TypeScript. Think of them like C++ header files. However, you still need to import the actual code into your webpage. One common way to do this is by adding a script tag in the head section of your HTML:

<script src="scripts/jquery.js"></script>

If you are not using a module system like CommonJS or AMD (which requires manual setup), it may be best to remove the import statement to avoid confusion.

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