ES6 Modules and Onclick Function Accessibility
When importing functions from ES6 modules for use in onclick event handlers, it's important to consider the scoping nature of modules. By default, modules create a separate scope to prevent name collisions.
In the provided code example, the issue arises because the imported hello function is defined within the module scope, and is therefore not directly accessible in the onclick handler.
To resolve this, there are two recommended approaches:
Using Event Listeners:
This approach involves using the addEventListener method to bind the imported function to the onclick event. Here's a modified version of the code:
<button type="button">
Exposing Functions to the Window Object (Not Recommended):
Another approach, although not recommended, is to explicitly expose the imported function to the window object. However, this practice can lead to potential naming conflicts.
import {hello} from './test.js' window.hello = hello
By exposing the function to the window object, it becomes accessible as an onclick handler. However, this method is not advised as it can pollute the global namespace and hinder debugging efforts.
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