The above link takes you to the branch called 4_api_call_with_fetch. However, jQuery is still very common out in the wild - so it's good to know about these methods, too.Įxample GitHub Repo for API Project with fetch() There aren't any advantages of using jQuery over fetch() or XMLHttpRequest objects - in fact, we'd generally recommend against using jQuery for this kind of thing, mainly because other libraries such as React are better tools than jQuery for working with the DOM. We will not cover them in this section, but if you'd like to explore them further, check out the jQuery.get() and jQuery.ajax() methods.
As thats not how JavaScript fetch() API has been designed. JQuery also provides some useful methods for making API calls as well. Why java script fetch() API gives OK response, even though the URL returned 404 or 500 or. Just make sure you get plenty of opportunity to practice both! The more practice you get with different ways of dealing with asynchrony, the stronger you'll be as a coder.
Fetch javascript full#
Use fetch() if you don't want to worry about dealing with XMLHttpRequest objects and want any advantages that come with streaming the data instead of waiting for the full response.Use XMLHttpRequest objects and promises if you want full control over being able to reject a promise.Here's a quick guide to consider which one you might want to use in different situations: Ultimately, even if you prefer using fetch(), it's still important to have a good understanding of XMLHttpRequest objects and promises because fetch() relies on both. You may choose to use either on this section's independent project. While the fetch() method is very useful, some developers prefer using XMLHttpRequest objects. There's potential for confusion because the parameter is named response - but that's just the name we gave it. If there isn't, we are just grabbing the message property from a JavaScript Error object. If there's a successful API call, we are parsing the body of the API response. It's important to emphasize that we are grabbing properties from two completely different things in the callback above. JavaScript Error objects have a handy message property so we can get the message via ssage. This function lets you load another URL and then add its. However, if the previous promise returns an error, that error will be passed into the response of getElements(). That sounds complicated, but with modern JavaScript, using AJAX means calling the fetch() function. In this case, if there's a main property we can go ahead and display the humidity and temperature. Remember, this main property is unique to responses from the OpenWeather API - we'd have to format our conditional differently for the response body of other APIs. If there isn't an error, the response will have a main property, which means if (response.main) will be truthy. Our callback has a conditional designed to display different content in the DOM depending on whether there was an error. Here's a basic GET request to the Open Weather API with fetch(): fetch(`$`) In other words, we can use fetch() instead of manually creating both promises and XMLHttpRequest objects.
In addition to using XMLHttpRequest under the hood, the fetch() method also returns a promise. It is not called the Fetch API because it is used to make API calls. Remember, that's all an API is: an application programming interface. Note that the Fetch API is called an API because it provides a simple interface we can use in our applications. In this lesson, we'll focus on the Fetch API, which will allow us to make a basic API call with a single line of code. While XMLHttpRequest objects get the job done, there are other methods that use XMLHttpRequest objects under the hood while making our lives easier as developers.
Fetch javascript code#
The second argument is optional and the default settings are all we need for a basic HTTP request so I will skip it.Now that we have experience creating and using XMLHttpRequest objects to make API calls, let's simplify our code even further.
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