JSX stands for JavaScript XML. With React, it's an extension for XML-like code for elements and components. Per the React docs and as you mentioned:

JSX is a XML-like syntax extension to ECMAScript without any defined semantics

From the quote above, you can see that JSX doesn't have defined semantics, it's just an extension to JavaScript that allows to write XML-like code for simplicity and elegance, and then you transpile the JSX into pure JavaScript function calls with React.createElement. Per the React tutorial:

JSX is a preprocessor step that adds XML syntax to JavaScript. You can definitely use React without JSX but JSX makes React a lot more elegant.

Just like XML, JSX tags have a tag name, attributes, and children. If an attribute value is enclosed in quotes, the value is a string. Otherwise, wrap the value in braces and the value is the enclosed JavaScript expression.

Any code in JSX is transformed into plain JavaScript/ECMAScript. Consider a component called Login. Now we render it like so with JSX:

<Login foo={...} bar={...} />

As you can see, JSX just allows you to have XML-like syntax for tags, representing components and elements in React. It's transpiled into pure JavaScript:

React.createElement(Login, { foo: ..., bar: ... });

You can read more at the docs.

Introducing JSX – React, is a XML-like syntax extension to ECMAScript without any defined semantics. It is called JSX, and it is a syntax extension to JavaScript. We recommend using it with React to describe what the UI should look like. JSX may remind you of a 

JSXJavaScript stand for syntax extension.It's similar to XML. You can use a simple JSX syntactic transform with React.

jsx react native, JSX may remind you of a template language, but it comes with the full power of JavaScript. JSX produces React “elements”. We will explore rendering them to the DOM in the next section. Below, you can find the basics of JSX necessary to get you started. This funny tag syntax is neither a string nor HTML. It is called JSX, and it is a syntax extension to JavaScript. We recommend using it with React to describe what 

JSX - JavaScript Syntax Extension A preprocessor step that adds XML syntax to JavaScript

jsx wiki, JSX may refer to: JSX (airline) · Jakarta Stock Exchange · JSX (JavaScript) or JavaScript XML, an XML-like syntax extension of JavaScript 

JSX stand for Javascript with XML like syntax

 eg.
<div>
</div>
or <td>
</td>

same like XML format put it in return form in class defined

jsx without react, React Without JSX. JSX is not a requirement for using React. Using React without JSX is especially convenient when you don’t want to set up compilation in your build environment. Each JSX element is just syntactic sugar for calling React.createElement (component, props, children). lets you write xml structures in javascript and apply your own meaning to them.