It means that the value of a constant variable cannot be changed. What are Constants in ES6?Ĭonstants are also referred to as Immutable variables. Let us move to the next ES6 Interview Questions. Babel is a popular javascript transpiler used for this purpose, allowing ES-6 code to convert into an ES-5 script to support all the browsers.
To convert into a pre-ES6 script, we required transpilers like Babel. How do you use ES6, or the best way to use ES6 in a project?Īs mentioned, all the browsers do not support ES6, so to use the ES6 script, we need to convert it into the ES5 script, which is supported by all the browsers.
Refer to the introduction part for the definition of ES6. Define ES6 and mention the new features of ES6? This first part covers basic ES6 Interview Questions and Answers. These questions are divided into two parts are as follows: Part 1 – ES6 Interview Questions (Basic) The rectified myHiFiRectangle.js file looks like below: import Rectangle from './rectangle.Web development, programming languages, Software testing & others Every class has to be exported as a module when it has to be used from a different place. Import MyHiFiRectangle from './scripts/myHiFirectangle.js' Įxport default statement was missing in myHiFiRectangle.js file. Here is how the head tag now looks in the test.html file after fixing this error: I was referring to myHiFiRectancle.js like a regular JS file using src tag as: src="Scripts/myHiFiRectangle.js" While referring to JS modules, the script type should be module instead. By the way, I was able to fix the issue without involving additional script.js file: I will point out the errors in precise sequential manner in the original code files. I'm also adding an answer after getting hint from ter's answer in this thread. I'm trying to check the native support of export/import class and module constructs in Vanilla JS and how it works. Note: To be clear again, I'm not using any transpilers like Babel. I tried reordering the JS files which are referred in the head tag of the HTML file but it had no impact. ReferenceError: MyHiFiRectangle is not defined Synta圎rror: import declarations may only appear at top level Synta圎rror: export declarations may only appear at top level of a Uncaught Synta圎rror: Unexpected token export The result is different on different browsers. Then, I tried loading test.html in browser.
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